Method for evaluating compatibility of abs resin

Abstract

The application relates to the technical field of resin performance testing, in particular to an evaluation method for the compatibility of ABS resin. SAN‑PB ; formula (I), wherein the compatibility parameter X SAN‑PB is smaller, the better the compatibility between the matrix resin and the dispersed phase in the ABS resin is. The method can quickly and accurately reflect the pros and cons of the compatibility between the dispersed phase and the matrix resin of the ABS resin, and the testing and evaluation method is simple and convenient.

Description

Technical Field

[0001] This invention relates to the field of resin performance testing technology, and specifically to a method for evaluating the compatibility of ABS resin. Background Technology

[0002] ABS resin is a plastic with excellent comprehensive performance. Its unique molecular structure endows it with good surface gloss, excellent mechanical properties, easy surface spraying, and electroplating characteristics, making it widely used. Its matrix resin is a highly polar polystyrene-acrylonitrile (SAN) component, and the dispersed phase is a polybutadiene rubber phase (PB). The multiphase composite structure of these two components gives ABS resin its excellent performance characteristics. The compatibility between the matrix resin and the dispersed phase of ABS resin refers to the strength of the interaction force between the dispersed phase (rubber phase) and the matrix resin. If the compatibility between the matrix resin and the rubber phase is poor, the ABS resin obtained from them will have poor macroscopic properties, and its toughness and strength will be relatively poor. Especially during long-term use, poor compatibility between the two phases can cause problems such as phase morphology changes, additive migration and precipitation, and a sharp deterioration in macroscopic performance.

[0003] Therefore, in the research and development and use of ABS resin, how to evaluate the compatibility between the matrix resin SAN and the dispersed phase PB is an important indicator for measuring the long-term stability and macroscopic performance of the final product.

[0004] However, current methods for evaluating the compatibility between the rubber phase and the matrix resin of ABS resin generally only involve preparing parts, conducting macroscopic performance tests or long-term performance tests, and observing cross-sectional morphology using SEM. There is a lack of rapid and accurate evaluation methods. If ABS resins from different manufacturers and of different types are available, it becomes difficult to compare the compatibility between their rubber phase and the matrix resin, posing challenges to performance evaluation and material development. Summary of the Invention

[0005] As mentioned above, the existing method for evaluating the compatibility of ABS resin is to conduct macroscopic performance tests or long-term service performance tests, and then use SEM tests to observe the cross-sectional morphology to determine the compatibility. If ABS resin that has not undergone long-term use is broken by chemical methods, and then the cross-section is directly subjected to SEM tests to observe the cross-sectional morphology, the compatibility of ABS resin cannot be accurately determined. Therefore, it can only be used as a reference.

[0006] Based on this, in order to overcome the problem of existing technologies lacking the ability to directly, quickly and accurately characterize the compatibility between the rubber phase and the matrix resin in ABS resin, the present invention provides a method for evaluating the compatibility of ABS resin, the method comprising: calculating the compatibility parameter X using the formula shown in equation (I). SAN-PB ; Formula (I), In equation (I), T g0 The peak value of the characteristic glass transition temperature of the rubber phase of ABS resin is taken as T. g1 The peak value of the characteristic glass transition temperature of the rubber phase of ABS resin Y is determined; T g0 and T g1 All units are in °C; W Tg0 The peak width values ​​for the characteristic glass transition behavior of the rubber phase of ABS resin are given by W. Tg1 The peak width values ​​for the characteristic glass transition behavior of the rubber phase of ABS resin Y are selected; W Tg0 and W Tg1 All units are in °C; H0 represents the surface hardness value of ABS resin, and H1 represents the surface hardness value of ABS resin Y; the units of H0 and H1 are both N / mm. 2 ; C0 is the impact strength value of ABS resin, and C1 is the impact strength value of ABS resin Y; the units of C0 and C1 are both J / m. Among them, ABS resin Y is obtained by compatibility degradation treatment of ABS resin.

[0007] Through the above technical solution, the present invention has at least the following beneficial effects: The method in this invention can quickly and accurately reflect the compatibility between the dispersed phase of ABS resin and the matrix resin, and the testing and evaluation method is simple and convenient. Attached Figure Description

[0008] Figure 1 This is an SEM image of the impact fracture surface of ABS resin A in Example 1 after long-term performance testing; Figure 2 This is an SEM image of the impact fracture surface of ABS resin B in Example 1 after long-term performance testing; Figure 3 This is an SEM image of the impact fracture surface of ABS resin C in Example 2 after long-term performance testing; Figure 4 This is an SEM image of the impact fracture surface of ABS resin D after long-term performance testing in Example 2; Figure 5 This is an SEM image of the impact fracture surface of ABS resin E in Example 3 after long-term performance testing; Figure 6 This is an SEM image of the impact fracture surface of ABS resin F in Example 3 after long-term performance testing; Figure 7 This is an SEM image of the impact fracture surface of ABS resin G in Example 4 after long-term performance testing. Figure 8 This is an SEM image of the impact fracture surface of ABS resin H in Example 4 after long-term performance testing; Figure 9 This is an SEM image of the impact fracture surface of ABS resin I in Example 5 after long-term performance testing; Figure 10 This is an SEM image of the impact fracture surface of ABS resin J in Example 5 after long-term performance testing; Figure 11 This is an SEM image of the impact fracture surface of ABS resin A in Comparative Example 1 without long-term performance testing. Figure 12 This is an SEM image of the impact fracture surface of ABS resin B in Comparative Example 1 without long-term performance testing. Detailed Implementation

[0009] The endpoints and any values ​​of the ranges disclosed herein are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of the various ranges, the endpoint values ​​of the various ranges and individual point values, and individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed herein.

[0010] This invention provides a method for evaluating the compatibility of ABS resin, the method comprising: The compatibility parameter X is calculated using the formula shown in equation (I). SAN-PB ; Formula (I), In equation (I), T g0 The peak value of the characteristic glass transition temperature of the rubber phase of ABS resin is taken as T. g1 The peak value of the characteristic glass transition temperature of the rubber phase of ABS resin Y is determined; T g0 and T g1 All units are in °C; W Tg0 The peak width values ​​for the characteristic glass transition behavior of the rubber phase of ABS resin are given by W. Tg1 The peak width values ​​for the characteristic glass transition behavior of the rubber phase of ABS resin Y are selected; W Tg0 and W Tg1 All units are in °C; H0 represents the surface hardness value of ABS resin, and H1 represents the surface hardness value of ABS resin Y; the units of H0 and H1 are both N / mm. 2 ; C0 is the impact strength value of ABS resin, and C1 is the impact strength value of ABS resin Y; the units of C0 and C1 are both J / m. Among them, ABS resin Y is obtained by compatibility degradation treatment of ABS resin.

[0011] The inventors conducted dynamic mechanical analysis, room temperature impact performance testing, and surface hardness testing on ABS resin and ABS resin obtained by compatibility degradation treatment (i.e., ABS resin Y), respectively, and obtained the corresponding results data. The researchers studied and obtained the above-mentioned calculation formula for evaluating the compatibility of ABS resin. This calculation formula can calculate the compatibility parameter between the dispersed phase of ABS resin and the matrix resin. The smaller the parameter, the better the compatibility between the matrix resin and the dispersed phase in ABS resin. This parameter can accurately reflect the quality of the compatibility between the dispersed phase and the matrix resin of ABS resin.

[0012] According to one embodiment of the present invention, the compatibility parameter X SAN-PB The smaller the value, the better the compatibility between the matrix resin and the dispersed phase in the ABS resin.

[0013] According to one embodiment of the present invention, the compatibility parameter X SAN-PB Less than 500. The compatibility parameter X calculated by the formula in this invention... SAN-PB The smaller the value, the better the compatibility between the matrix resin and the dispersed phase in the ABS resin. Preferably, the compatibility parameter X is... SAN-PB When the value is less than 500, the compatibility between the matrix resin and the dispersed phase in the ABS resin is good. In addition, when selecting ABS resin to prepare corresponding products, if it is necessary to select an ABS resin with good compatibility, a suitable ABS resin can be quickly screened according to the evaluation formula described above in this invention.

[0014] The compatibility degradation treatment in this invention refers to disrupting the compatibility between the matrix resin and the dispersed phase of the ABS resin, thereby worsening their compatibility. As long as the objective of this invention is achieved, the treatment method is not particularly limited. According to one embodiment of this invention, a plasticizing agent is adsorbed inside the matrix of the ABS resin Y, and both the matrix resin and the dispersed phase of the ABS resin Y have physical adsorption interactions with the plasticizing agent. The plasticizing agent is dispersed at the interface of the matrix resin and the interface of the dispersed phase, enabling resin plasticization and reducing the intermolecular forces between the matrix resin and the dispersed phase in the ABS resin Y, thereby disrupting the original compatibility between the matrix resin and the dispersed phase in the ABS resin.

[0015] According to one embodiment of the present invention, the mass ratio of the plasticizer to ABS resin is 0.001-0.1:1, for example, 0.001:1, 0.005:1, 0.01:1, 0.015:1, 0.03:1, 0.05:1, 0.07:1, 0.08:1, or 0.1:1. According to the present invention, when the compatibility degradation treatment method involves melt extrusion of ABS resin in the presence of the plasticizer, the mass ratio of the plasticizer to ABS resin in ABS resin Y is the ratio of the amount of plasticizer added to the amount of ABS resin added.

[0016] ABS resin is treated with a plasticizing agent to obtain ABS resin Y. Compared with ABS resin, the compatibility of ABS resin Y is compromised, resulting in plasticization of ABS resin Y and a reduction in the intermolecular forces between the matrix resin and the dispersed phase in ABS resin Y. According to one embodiment of the present invention, the plasticizing agent is selected from at least one of mineral oil, isoparaffin, polysiloxane, and epoxy fatty acid ester. The plasticizing agents in the present invention are all common chemical substances that can be obtained directly from commercial sources.

[0017] Plasticizing additives have good polarity, flowability and solubility, and can be dispersed at the interface between the matrix resin and the dispersed phase through physical adsorption, and have good compatibility with the interface.

[0018] According to one embodiment of the present invention, the mineral oil is selected from at least one of paraffin oil, kerosene and white oil.

[0019] According to one embodiment of the present invention, the isoalkanes are selected from C11-C14 isoalkanes. They can be isoalkanes containing aromatic rings or straight-chain isoalkanes, such as isopentylbenzene, 2-methylundecane, 2-methyltridecane, etc.

[0020] According to one embodiment of the present invention, the polysiloxane is selected from dimethyl silicone oil and / or amino silicone oil. The polysiloxane can be obtained directly from commercial sources, and there are no particular limitations on the number-average molecular weight of the polysiloxane, as long as the purpose of the present invention can be achieved.

[0021] According to one embodiment of the present invention, the epoxidized fatty acid ester is selected from epoxidized fatty acid methyl ester and / or epoxidized soybean oil.

[0022] According to one embodiment of the present invention, the method for compatibility degradation treatment includes: impregnating, melt extruding or mixing ABS resin in the presence of plasticizing agents, preferably melt extruding.

[0023] According to the present invention, melt extrusion is a conventional technique in the field. As long as the purpose of the present invention can be achieved, there are no special restrictions on the conditions of melt extrusion. The melt extrusion in the present invention adopts screw extrusion.

[0024] According to the present invention, intensive mixing is a conventional technique in the field, and there are no special restrictions on the conditions for intensive mixing as long as the purpose of the present invention can be achieved.

[0025] According to the present invention, impregnation involves thoroughly immersing the ABS resin in a plasticizing agent followed by surface drying, i.e., wiping the resin dry after immersion. There are no particular limitations on the temperature and time of impregnation, as long as the objective of the present invention is achieved. Impregnation in this invention is carried out at room temperature, and the impregnation time can be adjusted according to actual conditions. Furthermore, there are no particular limitations on the amount of plasticizing agent added, as long as the ABS resin is completely immersed. After surface drying, a portion of the plasticizing agent disperses at the interface between the matrix resin and the dispersed phase through physical adsorption.

[0026] According to one embodiment of the present invention, the characteristic peak of the glass transition behavior of the rubber phase is located between -100 and -30 °C. Dynamic mechanical analysis tests analyze the dynamic modulus and mechanical loss of materials under cyclic stress or strain. The glass transition temperature of polymer-based composite materials is detected by the changes of multiple parameters such as storage modulus, loss modulus, and loss factor with temperature. The present invention records the characteristic peak representing the glass transition behavior of the rubber phase, i.e., the characteristic peak located between -100 and -30 °C, through the loss modulus E''-temperature curve. The response characteristics of each component of ABS resin to temperature are studied based on the characteristic peak of the phase glass transition behavior.

[0027] In this invention, the starting temperature, peak temperature, ending temperature, and peak width obtained from dynamic mechanical analysis tests of ABS resin and ABS resin Y are all in degrees Celsius.

[0028] According to one embodiment of the present invention, the onset temperature T of the characteristic peak is obtained by dynamic mechanical analysis of the ABS resin. g0-ini The characteristic peak value T is taken as follows: g0 The termination temperature T of the characteristic peak g0-end In formula (I), the W Tg0 = T g0-end - T g0-ini This invention calculates the peak width of the characteristic peak based on the characteristic peak start temperature and characteristic peak end temperature of ABS resin.

[0029] According to one embodiment of the present invention, the onset temperature T of the characteristic peak is obtained by dynamic mechanical analysis of the ABS resin Y. g1-ini The characteristic peak value T is taken as follows: g1 The termination temperature T of the characteristic peak g1-end In formula (I), the W Tg1 = T g1-end - T g1-iniThis invention calculates the peak width of the characteristic peak based on the characteristic peak start temperature and characteristic peak end temperature of ABS resin Y.

[0030] The standard GB / T 40396-2021 is the Dynamic Mechanical Analysis (DMA) test method for the glass transition temperature of polymer-based composite materials. The Dynamic Mechanical Analysis method detects the glass transition temperature of polymer-based composite materials by measuring the changes of multiple parameters such as storage modulus, loss modulus, and loss factor with temperature. This standard can also be used as a reference for materials such as resins and plastics.

[0031] In this invention, a dynamic mechanical testing instrument is used to test ABS resin and ABS resin Y in accordance with standard GB / T 40396-2021. According to one embodiment of this invention, the dynamic mechanical analysis test is performed in accordance with standard GB / T 40396-2021.

[0032] Standard GB / T 40440-2021 specifies the requirements and test methods for impact-modified acrylonitrile-styrene copolymer (ABS, AEPDS, and ASA) extruded sheets. The room temperature impact performance test method in this invention is carried out with reference to this standard. According to one embodiment of this invention, the impact strength of the ABS resin and the impact strength of the ABS resin Y are each tested according to standard GB / T 40440-2021.

[0033] According to one embodiment of the present invention, the impact strength of the ABS resin and the impact strength of the ABS resin Y are obtained by testing at room temperature. In this invention, the impact strength of both the ABS resin and the ABS resin Y are expressed in J / m.

[0034] The standard GB / T 3398.1-2008 is for testing the hardness of plastics, Part 1: ball indentation method. The surface hardness test method in this invention is carried out with reference to this standard. According to one embodiment of this invention, the surface hardness of the ABS resin and the surface hardness of the ABS resin Y are each tested according to the standard GB / T 3398.1-2008.

[0035] In this invention, the surface hardness of both ABS resin and ABS resin Y is expressed in N / mm. 2 Units.

[0036] Unless otherwise specified, the following examples and comparative examples all employ conventional methods; the reagents and materials used are commercially available unless otherwise specified. Dynamic mechanical analysis and testing were conducted in accordance with standard GB / T 40396-2021; The room temperature impact performance was tested in accordance with the standard GB / T 40440-2021; Surface hardness was tested in accordance with standard GB / T 3398.1-2008.

[0037] Example 1 (1) Dynamic mechanical analysis tests were performed on ABS resin A and ABS resin B respectively using a dynamic mechanical testing instrument in accordance with standard GB / T 40396-2021. From the loss modulus E''-temperature curve of ABS resin A, the characteristic peak representing the glass transition behavior of the rubber phase was recorded, and the onset temperature T of the characteristic peak was recorded. g0A-ini The peak temperature T of this characteristic peak g0A The termination temperature T of this characteristic peak g0A-end From the loss modulus E''-temperature curve of ABS resin B, record the characteristic peak representing the glass transition behavior of the rubber phase, and record the onset temperature T of this characteristic peak. g0B-ini The peak temperature of this characteristic peak is T. g0B The termination temperature T of this characteristic peak g0B-end ; (2) Room temperature impact performance tests were conducted on ABS resin A and ABS resin B according to standard GB / T 40440-2021. The room temperature impact strength C of ABS resin A was measured. 0A The room temperature impact strength C of ABS resin B 0B ; (3) The surface hardness of ABS resin A and ABS resin B were tested according to standard GB / T 3398.1-2008. The surface hardness H of ABS resin A was measured. 0A The surface hardness H of ABS resin B 0B ; (4) Plasticizing agent [dimethyl silicone oil, 2-methyl undecane and white oil mixed in a mass ratio of 1:1:1] and ABS resin A are melt-extruded at 190-210℃ in a mass ratio of 0.05:1 to obtain ABS resin A1. In ABS resin A1, the mass ratio of plasticizing agent to ABS resin A is 0.05:1. Plasticizing agent [dimethyl silicone oil, 2-methylundecane and white oil mixed in a mass ratio of 1:1:1] and ABS resin B are added at a mass ratio of 0.05:1 and melt extruded at 190-210℃ to obtain ABS resin B1. In ABS resin B1, the mass ratio of plasticizing agent to ABS resin B is 0.05:1. (5) Dynamic mechanical analysis tests were performed on ABS resin A1 and ABS resin B1 respectively using a dynamic mechanical testing instrument in accordance with standard GB / T 40396-2021. The characteristic peak representing the glass transition behavior of the rubber phase was recorded from the loss modulus E''-temperature curve of ABS resin A1, and the onset temperature T of the characteristic peak was recorded. g1A-iniThe peak temperature T of this characteristic peak g1A The termination temperature T of this characteristic peak g1A-end From the loss modulus E''-temperature curve of ABS resin B1, record the characteristic peak representing the glass transition behavior of the rubber phase, and record the onset temperature T of this characteristic peak. g1B-ini The peak temperature of this characteristic peak is T. g1B The termination temperature T of this characteristic peak g1B-end ; (6) The room temperature impact properties of ABS resin A1 and ABS resin B1 were tested according to standard GB / T 40440-2021. The room temperature impact strength C of ABS resin A1 was measured. 1A The room temperature impact strength C of ABS resin B1 1B ; (7) The surface hardness of ABS resin A1 and ABS resin B1 was tested according to standard GB / T 3398.1-2008. The surface hardness H of ABS resin A1 was measured. 1A The surface hardness H of ABS resin B1 1B ; (8) Calculate the compatibility parameter X using the formula shown in equation (I). SAN-PB-A and X SAN-PB-B , Formula (I), In equation (I), T g0 T g1 W Tg0 W Tg1 H0, H1, C0, and C1 are all values ​​of the corresponding test data.

[0038] The test data are shown in Table 1, where X SAN-PB-A Less than X SAN-PB-B This indicates that, compared to ABS resin B, ABS resin A has better compatibility between the rubber phase and the matrix resin.

[0039] The impact fracture surface SEM images of ABS resin A and ABS resin B after long-term performance testing are shown below. Figure 1 and Figure 2 As shown, Figure 1 In the impact fracture surface of ABS resin A, the deformation area under impact stress is more uneven, indicating that the rubber phase and the matrix resin have good compatibility under impact stress, resulting in a larger range of deformation area. Figure 2 In the impact fracture surface of ABS resin B, the deformation area under impact stress is very flat, indicating that the rubber phase and the matrix resin have poor compatibility under impact stress, resulting in a smaller deformation area. In other words, the compatibility between the rubber phase and the matrix resin of ABS resin A is better than that of ABS resin B.

[0040] This demonstrates that the method for evaluating the compatibility of ABS resin in this invention is accurate.

[0041] Long-term performance test: Place the ABS resins (ABS resin A and ABS resin B) in an oven and leave them at 80 °C for 14 days.

[0042] Example 2 (1) Dynamic mechanical analysis tests were performed on ABS resin C and ABS resin D using a dynamic mechanical testing instrument in accordance with standard GB / T 40396-2021. The characteristic peak representing the glass transition behavior of the rubber phase was recorded from the loss modulus E''-temperature curve of ABS resin C, and the onset temperature T of the characteristic peak was recorded. g0C-ini The peak temperature T of this characteristic peak g0C The termination temperature T of this characteristic peak g0C-end From the loss modulus E''-temperature curve of ABS resin D, record the characteristic peak representing the glass transition behavior of the rubber phase, and record the onset temperature T of this characteristic peak. g0D-ini The peak temperature of this characteristic peak is T. g0D The termination temperature T of this characteristic peak g0D-end ; (2) The room temperature impact properties of ABS resin C and ABS resin D were tested according to standard GB / T 40440-2021. The room temperature impact strength C of ABS resin C was measured. 0C The room temperature impact strength C of ABS resin D 0D ; (3) The surface hardness of ABS resin C and ABS resin D was tested according to standard GB / T 3398.1-2008. The surface hardness H of ABS resin C was measured. 0C The surface hardness H of ABS resin D 0D ; (4) Plasticizing agent (paraffin oil and kerosene mixed in a mass ratio of 2:1) and ABS resin C are melt-extruded at 190-210℃ in a mass ratio of 0.015:1 to obtain ABS resin C1. In ABS resin C1, the mass ratio of plasticizing agent to ABS resin C is 0.015:1. Plasticizing agent (paraffin oil and kerosene mixed in a mass ratio of 2:1) and ABS resin D are added at a mass ratio of 0.015:1 and melt extruded at 190-210℃ to obtain ABS resin D1. In ABS resin D1, the mass ratio of plasticizing agent to ABS resin D is 0.015:1. (5) Dynamic mechanical analysis tests were performed on ABS resin C1 and ABS resin D1 respectively using a dynamic mechanical testing instrument in accordance with standard GB / T 40396-2021. The characteristic peak representing the glass transition behavior of the rubber phase was recorded from the loss modulus E''-temperature curve of ABS resin C1, and the onset temperature T of the characteristic peak was recorded. g1C-ini The peak temperature T of this characteristic peak g1C The termination temperature T of this characteristic peak g1C-end From the loss modulus E''-temperature curve of ABS resin D1, record the characteristic peak representing the glass transition behavior of the rubber phase, and record the onset temperature T of this characteristic peak. g1D-ini The peak temperature of this characteristic peak is T. g1D The termination temperature T of this characteristic peak g1D-end ; (6) The room temperature impact properties of ABS resin C1 and ABS resin D1 were tested according to standard GB / T 40440-2021. The room temperature impact strength C of ABS resin C1 was measured. 1C The room temperature impact strength C of ABS resin D1 1D ; (7) The surface hardness of ABS resin C1 and ABS resin D1 was tested according to standard GB / T 3398.1-2008. The surface hardness H of ABS resin C1 was measured. 1C The surface hardness H of ABS resin D1 1D ; (8) Calculate the compatibility parameter X using the formula shown in equation (I). SAN-PB-C and X SAN-PB-D , Formula (I), In equation (I), T g0 T g1 W Tg0 W Tg1 H0, H1, C0, and C1 are all values ​​of the corresponding test data.

[0043] The test data are shown in Table 1, where X SAN-PB-C Greater than X SAN-PB-D This indicates that, compared to ABS resin C, ABS resin D has better compatibility between the rubber phase and the matrix resin.

[0044] The SEM images of the impact fracture surfaces of ABS resin C and ABS resin D after long-term performance testing are shown below. Figure 3 and Figure 4 As shown, Figure 3In the impact fracture surface of ABS resin C, the deformation area under impact stress is relatively flat, indicating that the rubber phase and the matrix resin have poor compatibility under impact stress, resulting in a smaller range of deformation area. Figure 4 In the impact fracture surface of ABS resin D, the deformation area under impact stress is more uneven, indicating that the rubber phase and the matrix resin have good compatibility under impact stress, resulting in a larger deformation area. Therefore, the compatibility between the rubber phase and the matrix resin of ABS resin D is better than that of ABS resin C.

[0045] This demonstrates that the method for evaluating the compatibility of ABS resin in this invention is accurate.

[0046] Long-term performance test: Place the ABS resins (ABS resin C and ABS resin D) in an oven and leave them at 80 °C for 14 days.

[0047] Example 3 (1) Dynamic mechanical analysis tests were performed on ABS resin E and ABS resin F respectively using a dynamic mechanical testing instrument in accordance with standard GB / T 40396-2021. From the loss modulus E''-temperature curve of ABS resin E, the characteristic peak representing the glass transition behavior of the rubber phase was recorded, and the onset temperature T of the characteristic peak was recorded. g0E-ini The peak temperature T of this characteristic peak g0E The termination temperature T of this characteristic peak g0E-end From the loss modulus E''-temperature curve of ABS resin F, record the characteristic peak representing the glass transition behavior of the rubber phase, and record the onset temperature T of this characteristic peak. g0F-ini The peak temperature of this characteristic peak is T. g0F The termination temperature T of this characteristic peak g0F-end ; (2) The room temperature impact properties of ABS resin E and ABS resin F were tested according to standard GB / T 40440-2021. The room temperature impact strength C of ABS resin E was measured. 0E The room temperature impact strength C of ABS resin F 0F ; (3) The surface hardness of ABS resin E and ABS resin F were tested according to standard GB / T 3398.1-2008. The surface hardness H of ABS resin E was measured. 0E The surface hardness H of ABS resin F 0F ; (4) White oil and ABS resin E are added at a mass ratio of 0.001:1 and melt extruded at 190-210℃ to obtain ABS resin E1. In ABS resin E1, the mass ratio of plasticizing agent to ABS resin E is 0.001:1. ABS resin F1 is obtained by melt extrusion of white oil and ABS resin F at a mass ratio of 0.001:1 at 190-210℃. In ABS resin F1, the mass ratio of plasticizing agent to ABS resin F is 0.001:1. (5) Dynamic mechanical analysis tests were performed on ABS resin E1 and ABS resin F1 respectively using a dynamic mechanical testing instrument in accordance with standard GB / T 40396-2021. The characteristic peak representing the glass transition behavior of the rubber phase was recorded from the loss modulus E''-temperature curve of ABS resin E1, and the onset temperature T of the characteristic peak was recorded. g1E-ini The peak temperature T of this characteristic peak g1E The termination temperature T of this characteristic peak g1E-end From the loss modulus E''-temperature curve of ABS resin F1, record the characteristic peak representing the glass transition behavior of the rubber phase, and record the onset temperature T of this characteristic peak. g1F-ini The peak temperature of this characteristic peak is T. g1F The termination temperature T of this characteristic peak g1F-end ; (6) The room temperature impact properties of ABS resin E1 and ABS resin F1 were tested according to standard GB / T 40440-2021. The room temperature impact strength C of ABS resin E1 was measured. 1E The room temperature impact strength C of ABS resin F1 1F ; (7) The surface hardness of ABS resin E1 and ABS resin F1 was tested according to standard GB / T 3398.1-2008. The surface hardness H of ABS resin E1 was measured. 1E The surface hardness H of ABS resin F1 1F ; (8) Calculate the compatibility parameter X using the formula shown in equation (I). SAN-PB-E and X SAN-PB-F , Formula (I), In equation (I), T g0 T g1 W Tg0 W Tg1 H0, H1, C0, and C1 are all values ​​of the corresponding test data.

[0048] The test data are shown in Table 1, where X SAN-PB-E Greater than X SAN-PB-F This indicates that, compared to ABS resin E, ABS resin F has better compatibility between the rubber phase and the matrix resin.

[0049] The SEM images of the impact fracture surfaces of ABS resin E and ABS resin F after long-term performance testing are shown below. Figure 5 and Figure 6 As shown, Figure 5 In the impact fracture surface of ABS resin E, the deformation area under impact stress is very flat. Figure 6 In the impact fracture surface of ABS resin F, the deformation area under impact stress is more uneven. Therefore, the compatibility between the rubber phase and the matrix resin of ABS resin F is better than that of ABS resin E.

[0050] This demonstrates that the method for evaluating the compatibility of ABS resin in this invention is accurate.

[0051] Long-term performance test: Place the ABS resins (ABS resin E and ABS resin F) in an oven and leave them at 80 °C for 14 days.

[0052] Example 4 (1) Dynamic mechanical analysis tests were performed on ABS resin G and ABS resin H respectively using a dynamic mechanical testing instrument in accordance with standard GB / T 40396-2021. From the loss modulus E''-temperature curve of ABS resin G, the characteristic peak representing the glass transition behavior of the rubber phase was recorded, and the onset temperature T of the characteristic peak was recorded. g0G-ini The peak temperature T of this characteristic peak g0G The termination temperature T of this characteristic peak g0G-end From the loss modulus E''-temperature curve of ABS resin H, record the characteristic peak representing the glass transition behavior of the rubber phase, and record the onset temperature T of this characteristic peak. g0H-ini The peak temperature of this characteristic peak is T. g0H The termination temperature T of this characteristic peak g0H-end ; (2) The room temperature impact properties of ABS resin G and ABS resin H were tested according to standard GB / T 40440-2021. The room temperature impact strength C of ABS resin G was measured. 0G The room temperature impact strength C of ABS resin H 0H ; (3) The surface hardness of ABS resin G and ABS resin H were tested according to standard GB / T 3398.1-2008. The surface hardness H of ABS resin G was measured. 0G Surface hardness H of ABS resin 0H ; (4) Plasticizing agent (amino silicone oil, epoxidized soybean oil and kerosene mixed in a mass ratio of 1:2:1) and ABS resin G are added at a mass ratio of 0.1:1 and melt extruded at 190-210℃ to obtain ABS resin G1. In ABS resin G1, the mass ratio of plasticizing agent to ABS resin G is 0.1:1. Plasticizing agent (amino silicone oil, epoxidized soybean oil and kerosene mixed in a mass ratio of 1:2:1) and ABS resin H are added at a mass ratio of 0.1:1 and melt extruded at 190-210℃ to obtain ABS resin H1. In ABS resin H1, the mass ratio of plasticizing agent to ABS resin H is 0.1:1. (5) Dynamic mechanical analysis tests were performed on ABS resin G1 and ABS resin H1 respectively using a dynamic mechanical testing instrument in accordance with standard GB / T 40396-2021. The characteristic peak representing the glass transition behavior of the rubber phase was recorded from the loss modulus E''-temperature curve of ABS resin G1, and the onset temperature T of the characteristic peak was recorded. g1G-ini The peak temperature T of this characteristic peak g1G The termination temperature T of this characteristic peak g1G-end From the loss modulus E''-temperature curve of ABS resin H1, record the characteristic peak representing the glass transition behavior of the rubber phase, and record the onset temperature T of this characteristic peak. g1H-ini The peak temperature of this characteristic peak is T. g1H The termination temperature T of this characteristic peak g1H-end ; (6) The room temperature impact properties of ABS resin G1 and ABS resin H1 were tested according to standard GB / T 40440-2021. The room temperature impact strength C of ABS resin G1 was measured. 1G The room temperature impact strength C of ABS resin H1 1H ; (7) The surface hardness of ABS resin G1 and ABS resin H1 was tested according to standard GB / T 3398.1-2008. The surface hardness H of ABS resin G1 was measured. 1G The surface hardness H of ABS resin H1 1H ; (8) Calculate the compatibility parameter X using the formula shown in equation (I). SAN-PB-G and X SAN-PB-H , Formula (I), In equation (I), T g0 T g1 W Tg0 W Tg1 H0, H1, C0, and C1 are all values ​​of the corresponding test data.

[0053] The test data are shown in Table 1, where X SAN-PB-G Greater than X SAN-PB-H This indicates that, compared to ABS resin G, ABS resin H has better compatibility between the rubber phase and the matrix resin.

[0054] The SEM images of the impact fracture surfaces of ABS resin G and ABS resin H after long-term performance testing are shown below. Figure 7 and Figure 8 As shown, Figure 7 In the impact fracture surface of ABS resin G, the deformation area under impact stress is very flat. Figure 8 In the impact fracture surface of ABS resin H, the deformation area under impact stress is more uneven. Therefore, the compatibility between the rubber phase and the matrix resin of ABS resin H is better than that of ABS resin G.

[0055] This demonstrates that the method for evaluating the compatibility of ABS resin in this invention is accurate.

[0056] Long-term performance test: Place the ABS resins (ABS resin G and ABS resin H) in an oven and leave them at 80 °C for 14 days.

[0057] Example 5 (1) Dynamic mechanical analysis tests were performed on ABS resin I and ABS resin J using a dynamic mechanical testing instrument in accordance with standard GB / T 40396-2021. The characteristic peak representing the glass transition behavior of the rubber phase was recorded from the loss modulus E''-temperature curve of ABS resin I, and the onset temperature T of the characteristic peak was recorded. g0I-ini The peak temperature T of this characteristic peak g0I The termination temperature T of this characteristic peak g0I-end From the loss modulus E''-temperature curve of ABS resin J, record the characteristic peak representing the glass transition behavior of the rubber phase, and record the onset temperature T of this characteristic peak. g0J-ini The peak temperature of this characteristic peak is T. g0J The termination temperature T of this characteristic peak g0J-end ; (2) The room temperature impact performance of ABS resin I and ABS resin J was tested according to standard GB / T 40440-2021. The room temperature impact strength C of ABS resin I was measured. 0I The room temperature impact strength C of ABS resin J 0J ; (3) The surface hardness of ABS resin I and ABS resin J was tested according to standard GB / T 3398.1-2008. The surface hardness H of ABS resin I was measured. 0I The surface hardness H of ABS resin J 0J ; (4) The plasticizing agent [2-methyltridecane and epoxy fatty acid methyl ester mixed in a mass ratio of 1:3] and ABS resin I are melt-extruded at 190-210℃ in a mass ratio of 0.03:1 to obtain ABS resin I1. In ABS resin I1, the mass ratio of plasticizing agent to ABS resin I is 0.03:1. Plasticizing agent [2-methyltridecane and epoxy fatty acid methyl ester mixed in a mass ratio of 1:3] and ABS resin J are added at a mass ratio of 0.03:1 and melt extruded at 190-210℃ to obtain ABS resin J1. In ABS resin J1, the mass ratio of plasticizing agent to ABS resin J is 0.03:1. (5) Dynamic mechanical analysis tests were performed on ABS resin I1 and ABS resin J1 respectively using a dynamic mechanical testing instrument in accordance with standard GB / T 40396-2021. The characteristic peak representing the glass transition behavior of the rubber phase was recorded from the loss modulus E''-temperature curve of ABS resin I1, and the onset temperature T of the characteristic peak was recorded. g1I-ini The peak temperature T of this characteristic peak g1I The termination temperature T of this characteristic peak g1I-end From the loss modulus E''-temperature curve of ABS resin J1, record the characteristic peak representing the glass transition behavior of the rubber phase, and record the onset temperature T of this characteristic peak. g1J-ini The peak temperature of this characteristic peak is T. g1J The termination temperature T of this characteristic peak g1J-end ; (6) The room temperature impact performance of ABS resin I1 and ABS resin J1 was tested according to standard GB / T 40440-2021. The room temperature impact strength C of ABS resin I1 was measured. 1I The room temperature impact strength C of ABS resin J1 1J ; (7) The surface hardness of ABS resin I1 and ABS resin J1 was tested according to standard GB / T 3398.1-2008. The surface hardness H of ABS resin I1 was measured. 1I The surface hardness H of ABS resin J1 1J ; (8) Calculate the compatibility parameter X using the formula shown in equation (I). SAN-PB-I and X SAN-PB-J , Formula (I), In equation (I), T g0 T g1 W Tg0 W Tg1 H0, H1, C0, and C1 are all values ​​of the corresponding test data.

[0058] The test data are shown in Table 1, where X SAN-PB-I Greater than X SAN-PB-J This indicates that, compared to ABS resin I, ABS resin J has better compatibility between the rubber phase and the matrix resin.

[0059] The SEM images of the impact fracture surfaces of ABS resin I and ABS resin J after long-term performance testing are shown below. Figure 9 and Figure 10 As shown, Figure 9 In the impact fracture surface of ABS resin I, the deformation area under impact stress is very flat. Figure 10 In the impact fracture surface of ABS resin J, the deformation area under impact stress is more uneven. Therefore, the compatibility between the rubber phase and the matrix resin of ABS resin J is better than that of ABS resin I.

[0060] This demonstrates that the method for evaluating the compatibility of ABS resin in this invention is accurate.

[0061] Long-term performance test: Place the ABS resins (ABS resin I and ABS resin J) in an oven and leave them at 80 °C for 14 days.

[0062] Comparative Example 1 SEM images of the impact fracture surfaces of ABS resin A and ABS resin B, which have not undergone long-term performance testing, are shown below. Figure 11 and Figure 12 As shown in the figure, the deformation regions of ABS resin A and ABS resin B under impact stress are quite similar on the impact fracture surfaces that have not undergone long-term performance testing. Therefore, it is not possible to directly determine which ABS resin has better compatibility between the rubber phase and the matrix resin based on the SEM images of the impact fracture surfaces that have not undergone long-term performance testing.

[0063] Table 1

[0064] The preferred embodiments of the present invention have been described in detail above; however, the present invention is not limited thereto. Within the scope of the inventive concept, various simple modifications can be made to the technical solutions of the present invention, including combinations of various technical features in any other suitable manner. These simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention.

Claims

1. A method for evaluating the compatibility of ABS resin, characterized in that, The method includes: calculating the compatibility parameter X using the formula shown in equation (I). SAN-PB ; Equation (I), In equation (I), T g0 The peak value of the characteristic glass transition temperature of the rubber phase of ABS resin is taken as T. g1 The peak value of the characteristic glass transition temperature of the rubber phase of ABS resin Y is determined; T g0 and T g1 All units are in °C; W Tg0 The peak width values ​​for the characteristic glass transition behavior of the rubber phase of ABS resin are given by W. Tg1 The peak width values ​​for the characteristic glass transition behavior of the rubber phase of ABS resin Y are selected; W Tg0 and W Tg1 All units are in °C; H0 represents the surface hardness value of ABS resin, and H1 represents the surface hardness value of ABS resin Y; the units of H0 and H1 are both N / mm. 2 ; C0 is the impact strength value of ABS resin, and C1 is the impact strength value of ABS resin Y; the units of C0 and C1 are both J / m. Among them, ABS resin Y is obtained by compatibility degradation treatment of ABS resin.

2. The method according to claim 1, characterized in that, The compatibility parameter X SAN-PB The smaller the value, the better the compatibility between the matrix resin and the dispersed phase in the ABS resin.

3. The method according to claim 1, characterized in that, The matrix of the ABS resin Y contains adsorbed plasticizing agents, and the matrix resin and the dispersed phase of the ABS resin Y have physical adsorption interactions with the plasticizing agents.

4. The method according to claim 3, characterized in that, The mass ratio of the plasticizing agent to ABS resin is 0.001-0.1:

1.

5. The method according to claim 3, characterized in that, The plasticizing agent is selected from at least one of mineral oil, isoparaffin, polysiloxane, and epoxy fatty acid ester.

6. The method according to claim 5, characterized in that, The mineral oil is selected from at least one of paraffin oil, kerosene, and white oil; and / or The isoparaffin is selected from C11-C14 isoparaffins; and / or The polysiloxane is selected from dimethyl silicone oil and / or amino silicone oil; and / or The epoxidized fatty acid ester is selected from epoxidized fatty acid methyl ester and / or epoxidized soybean oil.

7. The method according to any one of claims 1-6, characterized in that, The method for compatibility degradation treatment includes: impregnating, melt extruding, or mixing ABS resin in the presence of plasticizing agents.

8. The method according to claim 1, characterized in that, The characteristic peak of the glass transition behavior of the rubber phase is located at -100 ~ -30 ℃.

9. The method according to claim 1, characterized in that, The characteristic peak onset temperature T was obtained by dynamic mechanical analysis of the ABS resin. g0-ini The characteristic peak value T is taken as follows: g0 The termination temperature T of the characteristic peak g0-end In formula (I), the W Tg0 = T g0-end - T g0-ini ; and / or The characteristic peak onset temperature T was obtained by dynamic mechanical analysis of the ABS resin Y. g1-ini The characteristic peak value T is taken as follows: g1 The termination temperature T of the characteristic peak g1-end In formula (I), the W Tg1 = T g1-end - T g1-ini .

10. The method according to claim 9, characterized in that, The dynamic mechanical analysis and testing were conducted in accordance with the standard GB / T 40396-2021.

11. The method according to claim 1, characterized in that, The impact strength of the ABS resin and the impact strength of the ABS resin Y are each tested according to standard GB / T 40440-2021; and / or The impact strength of the ABS resin and the impact strength of the ABS resin Y were obtained by testing at room temperature.

12. The method according to claim 1, characterized in that, The surface hardness of the ABS resin and the surface hardness of the ABS resin Y were each tested according to standard GB / T 3398.1-2008.

Images