Composite material template prepared by utilizing recycled PC template and production process of composite material template

Abstract

The invention discloses a composite material template prepared from a recycled PC template and a production process of the composite material template, and belongs to the technical field of polycarbonate composite materials. The composite material template prepared from the recycled PC template comprises the following components in parts by weight: 5-15 parts of a PC template recycled material, 60-80 parts of polycarbonate, 5-10 parts of a compatilizer, 2-5 parts of MBS, 5-8 parts of butadiene rubber, 10-20 parts of modified glass fibers, 2-5 parts of a dispersing agent, 0.5-1 part of an antioxidant and 0.2-0.5 part of an optical stabilizer. Through the matching effect of the specific compatilizer, MBS, butadiene rubber and modified glass fiber, on one hand, on the basis that the specific compatilizer is added to improve the compatibility of the composite material, the mechanical property of the composite material is not lost; and on the other hand, butadiene rubber, MBS and modified glass fibers are matched to improve the mechanical property of the composite material, so that the PC template reclaimed material is fully utilized to prepare the composite material template with good performance.

Description

Technical Field

[0001] The present application relates to a composite template prepared from recycled PC templates and its production process, belonging to the technical field of polycarbonate composite materials. Background Art

[0002] Polycarbonate (PC) is a thermoplastic engineering plastic containing carbonate groups in its molecular chain, with excellent transparency and good impact toughness, and is widely used in the fields of electronics and electrical appliances, automotive industry, machinery, optics, medicine, etc. In recent years, the rapid growth of PC consumption has inevitably generated a large number of waste PC products. Although it is a valuable renewable resource, improper treatment will cause irreparable harm to the environment; therefore, the recycling and reuse of waste PC products have significant economic and social benefits.

[0003] With the development of technology, many people have proposed to use PC materials with excellent heat resistance, impact resistance, dimensional stability and processing fluidity to prepare building templates. The prepared building templates have the advantages of light weight, strong water resistance, smooth surface, not easy to rust and rot, hydrophobic cement, recyclable, etc. However, after PC is recycled and reprocessed many times, it is prone to degradation, and its mechanical properties, especially the notched impact strength, will decrease significantly, and there are also problems of poor compatibility.

[0004] In the prior art, compatibilizers are added to improve the problem of poor compatibility, and the dosage of compatibilizers to be added is also large, which reduces the overall mechanical strength and wear resistance of the material. Therefore, how to make good use of recycled PC templates is of great significance for resource conservation and environmental protection. Summary of the Invention

[0005] In order to solve the above problems, a composite template prepared from recycled PC templates and its production process are provided. The composite template prepared from recycled PC templates, through the combined action of specific compatibilizers, MBS, butadiene rubber, and modified glass fibers, on the one hand, on the basis of adding specific compatibilizers to improve the compatibility of the composite material, its mechanical properties will not be lost; on the other hand, the combined action of butadiene rubber, MBS, and modified glass fibers improves the mechanical properties of the composite material to fully utilize the recycled PC template materials to prepare composite templates with good performance.

[0006] According to one aspect of the present application, a composite template prepared from recycled PC templates is provided. By weight, it includes 5 - 15 parts of recycled PC template materials, 60 - 80 parts of polycarbonate, 5 - 10 parts of compatibilizer, 2 - 5 parts of MBS, 5 - 8 parts of butadiene rubber, 10 - 20 parts of modified glass fibers, 2 - 5 parts of dispersant, 0.5 - 1 part of antioxidant, and 0.2 - 0.5 part of optical stabilizer.

[0007] Specifically, the dispersant includes polyethylene glycol; the antioxidant includes antioxidant 1010 or antioxidant 168; the light stabilizer includes UV637 or UV981.

[0008] Optionally, the compatibilizer includes maleic anhydride grafted ABS and hyperbranched polyetheramine; the modified glass fiber is obtained by modification with phthalate coupling agent.

[0009] Specifically, in this application, maleic anhydride grafted ABS and hyperbranched polyetheramine are jointly used as the compatibilizer. The two act synergistically. The molecular chain of maleic anhydride grafted ABS has maleic anhydride functional groups, which have high reactivity and can chemically react with the active groups that may exist on the surface of PC template recycled material, polycarbonate, and other additives, playing a role of chemical bonding; hyperbranched polyetheramine has a highly branched molecular structure and many active end groups. On the one hand, it can act synergistically with maleic anhydride grafted ABS and react with other components through the end groups. On the other hand, its unique structure helps to improve the compatibility of the system, increase the mutual solubility and dispersibility between components, reduce the phase separation phenomenon, and make the entire composite material system more uniform and stable.

[0010] Optionally, the mass ratio of the maleic anhydride grafted ABS to the hyperbranched polyetheramine is (2 - 5):1.

[0011] Specifically, this application makes a specific limitation on the mass ratio of maleic anhydride grafted ABS to hyperbranched polyetheramine. The two cooperate with each other in a specific mass ratio. Maleic anhydride grafted ABS focuses on connecting different components through chemical reactions, while hyperbranched polyetheramine uses its structural characteristics to adjust the compatibility and fluidity of the system. The two act together to promote better mixing of PC template recycled material, polycarbonate, and other components, improve the interfacial bonding force, and thus improve the overall performance of the composite material.

[0012] Optionally, the preparation method of the modified glass fiber includes the following steps:

[0013] Dissolve the phthalate coupling agent in toluene, add glass fiber, and react fully under ultrasonic oscillation. After the reaction is completed, perform drying treatment to obtain the modified glass fiber.

[0014] Specifically, the carbonate coupling agent includes isopropyl tris(isostearoyl) titanate.

[0015] Specifically, the present application uses a phthalate coupling agent to modify glass fibers. On the surface of the modified glass fibers, a chemical reaction occurs between the phthalate coupling agent and active groups such as hydroxyl groups on the surface of the glass fibers, enabling the coupling agent to firmly adhere to the surface of the glass fibers. At the other end of the coupling agent molecule, it can have a good interaction with matrix polymers such as polycarbonate, enhancing the interfacial bonding force between the glass fibers and the matrix, improving the dispersibility of the glass fibers in the matrix, and thus significantly enhancing the mechanical properties of the composite material, such as tensile strength, flexural strength, etc. At the same time, the glass fibers can play a role in bearing and transmitting external forces in the material, enhancing the overall structural strength of the material.

[0016] Optionally, the mass of the phthalate coupling agent is 1-2% of the mass of the glass fibers, and the time of ultrasonic oscillation is 20-30 min.

[0017] Specifically, the present application has defined the modification method and parameters to obtain modified glass fibers with good modification effects.

[0018] Optionally, it further includes the step of graft-modifying butadiene rubber with acrylate monomers to obtain modified butadiene rubber.

[0019] Specifically, the present application also includes the step of graft-modifying butadiene rubber. After grafting, the molecular chain of the butadiene rubber carries acrylate polymer segments. These segments are more similar in chemical structure to matrix polymers such as polycarbonate, improving the compatibility, and can endow the material with some new properties, such as improving weather resistance, processing fluidity, etc., enabling the rubber to better exert its performance advantages such as elasticity and impact resistance in the composite material system.

[0020] Optionally, the preparation method of the modified butadiene rubber includes the following steps:

[0021] S1 Add butadiene rubber, acrylate monomers, and an initiator into a reaction kettle.

[0022] S2 Under the protection of nitrogen, react at 70-100 °C for 3-5 h. After the reaction is completed, cool down and discharge to obtain modified butadiene rubber.

[0023] Optionally, the acrylate monomers include methyl methacrylate or butyl acrylate; the initiator is azobisisobutyronitrile; the mass of the acrylate monomers is 10-20% of the mass of the butadiene rubber; the mass of the initiator is 0.5-1.5% of the mass of the acrylate monomers.

[0024] Specifically, the present application has specifically defined the preparation method and parameters of the modified butadiene rubber to enable the butadiene rubber to better exert its performance advantages.

[0025] According to another aspect of the present application, there is also provided a production process of the composite material template prepared by using the recycled PC template as described above, including the following steps:

[0026] (1) Place the recycled PC template material in a twin-screw extruder for extrusion granulation;

[0027] (2) Weigh the recycled PC template material, polycarbonate, compatibilizer, MBS, butadiene rubber, modified glass fiber, dispersant, antioxidant, and optical stabilizer according to parts by weight and add them to a high-speed mixer for uniform mixing to obtain a premix;

[0028] (3) Melt and extrude the premix through a twin-screw extruder for granulation to obtain a composite material prepared by using the recycled PC template;

[0029] (4) Inject mold the composite material prepared by using the recycled PC template obtained in step (3) to obtain a composite material template prepared by using the recycled PC template.

[0030] Specifically, the present application specifically defines the steps of the production process of the composite material template prepared by using the recycled PC template. First, the recycled PC template material is extruded and granulated to remove the impurity waste part therein to obtain the recycled PC template material; then, raw material mixing, extrusion granulation, and injection molding are carried out to obtain a composite material template prepared by using the recycled PC template.

[0031] Optionally, when granulating with the twin-screw extruder in steps (1) and (3), it is divided into a feeding section, a plasticizing section, and a metering section. The temperature of the feeding section is 190 - 220 °C, the temperature of the plasticizing section is 220 - 240 °C, and the temperature of the metering section is 240 - 260 °C; the temperature of injection molding in step (4) is 220 - 270 °C.

[0032] Specifically, the present application specifically defines the parameters of the production process to make full use of the recycled PC template to obtain a composite material template prepared by using the recycled PC template with excellent performance.

[0033] The beneficial effects of the present application include but are not limited to:

[0034] 1. For the composite material template prepared by using the recycled PC template according to the present application, through the combined action of specific compatibilizer, MBS, butadiene rubber, and modified glass fiber, on the one hand, based on adding a specific compatibilizer to improve the compatibility of the composite material, its mechanical properties will not be lost; on the other hand, the combined action of butadiene rubber, MBS, and modified glass fiber improves the mechanical properties of the composite material to make full use of the recycled PC template material to prepare a composite material template with good performance.

[0035] 2. The composite material template prepared by using the recycled PC template according to the present application uses maleic anhydride grafted ABS and hyperbranched polyetheramine together as compatibilizers. The two act synergistically. The molecular chain of maleic anhydride grafted ABS has maleic anhydride functional groups, and hyperbranched polyetheramine has a highly branched molecular structure and many active end groups. On the one hand, hyperbranched polyetheramine can act synergistically with maleic anhydride grafted ABS and react with other components through the end groups. On the other hand, the unique structure of hyperbranched polyetheramine helps to improve the compatibility of the system, increase the mutual solubility and dispersibility between components, reduce the phase separation phenomenon, and make the entire composite material system more uniform and stable.

[0036] 3. The composite material template prepared by using the recycled PC template according to the present application modifies the interfacial bonding force between the glass fiber reinforcement and the matrix, improves the dispersibility of the glass fiber in the matrix, thereby significantly enhancing the mechanical properties of the composite material. At the same time, the glass fiber in the material can play a role in bearing and transmitting external forces, enhancing the overall structural strength of the material.

[0037] 4. The production process of the composite material template prepared by using the recycled PC template according to the present application has simple steps and is convenient for popularization and utilization. Detailed Embodiments

[0038] The present application will be described in detail below with reference to the embodiments, but the present application is not limited to these embodiments.

[0039] Unless otherwise specified, the raw materials in the embodiments and comparative examples of the present application are purchased through commercial channels.

[0040] Unless otherwise specified, the methods used in the embodiments and comparative examples of the present application are conventional methods in the prior art.

[0041] The recycled PC template materials involved in the embodiments and comparative examples of the present application are obtained by pulverizing the PC-based templates recycled after multiple uses on the market.

[0042] Example 1

[0043] A production process of a composite material template prepared by using a recycled PC template includes the following steps:

[0044] (1) Place the recycled PC template material in a twin-screw extruder for extrusion granulation. When the twin-screw extruder granulates, it is divided into a feeding section, a plasticizing section, and a metering section. The temperature of the feeding section is 190 °C, the temperature of the plasticizing section is 220 °C, and the temperature of the metering section is 240 °C;

[0045] (2) Weigh 5 parts of recycled PC template material, 60 parts of polycarbonate, 5 parts of compatibilizer maleic anhydride grafted ABS and hyperbranched polyetheramine, 2 parts of MBS, 5 parts of butadiene rubber, 10 parts of modified glass fiber, 2 parts of dispersant polyethylene glycol, 0.5 part of antioxidant 1010 and 0.2 part of optical stabilizer UV637, and add them to a high-speed mixer to mix evenly. The mass ratio of maleic anhydride grafted ABS to hyperbranched polyetheramine is 2:1 to obtain a premix;

[0046] (3) Melt and extrude granulate the premix through a twin-screw extruder. When the twin-screw extruder granulates, it is divided into a feeding section, a plasticizing section and a metering section. The temperature of the feeding section is 190 °C, the temperature of the plasticizing section is 220 °C, and the temperature of the metering section is 240 °C to obtain a composite material prepared from recycled PC templates;

[0047] (4) Inject and mold the composite material prepared from recycled PC templates obtained in step (3). The temperature of injection molding is 220 °C to obtain a composite material template prepared from recycled PC templates;

[0048] Preparation of modified glass fiber:

[0049] Dissolve phthalate coupling agent isopropyl tris(isostearoyl) titanate in toluene, add glass fiber, and react fully under ultrasonic vibration. The mass of the phthalate coupling agent is 1% of the mass of the glass fiber, and the ultrasonic vibration time is 20 min. After the reaction, perform drying treatment to obtain modified glass fiber.

[0050] Example 2

[0051] A production process of a composite material template prepared from recycled PC templates, comprising the following steps:

[0052] (1) Place the recycled PC template material in a twin-screw extruder for extrusion granulation. When the twin-screw extruder granulates, it is divided into a feeding section, a plasticizing section and a metering section. The temperature of the feeding section is 220 °C, the temperature of the plasticizing section is 240 °C, and the temperature of the metering section is 260 °C;

[0053] (2) Weigh 15 parts of recycled PC template material, 80 parts of polycarbonate, 10 parts of compatibilizer maleic anhydride grafted ABS and hyperbranched polyetheramine, 5 parts of MBS, 8 parts of butadiene rubber, 20 parts of modified glass fiber, 5 parts of dispersant polyethylene glycol, 1 part of antioxidant 168 and 0.5 part of optical stabilizer UV981, and add them to a high-speed mixer to mix evenly to obtain a premix;

[0054] (3) The premix is melted and pelletized through a twin-screw extruder. When the twin-screw extruder is pelletizing, it is divided into a feeding section, a plasticizing section, and a metering section. The temperature of the feeding section is 220 °C, the temperature of the plasticizing section is 240 °C, and the temperature of the metering section is 260 °C, obtaining a composite material prepared using recycled PC templates.

[0055] (4) The composite material prepared using recycled PC templates obtained in step (3) is injection molded at a temperature of 270 °C to obtain a composite material template prepared using recycled PC templates.

[0056] Preparation of modified glass fiber:

[0057] The phthalate coupling agent isopropyltri(isostearoyl) titanate is dissolved in toluene, glass fiber is added, and the reaction is fully carried out under ultrasonic vibration. The mass of the phthalate coupling agent is 2% of the mass of the glass fiber, the ultrasonic vibration time is 30 min, and after the reaction is completed, drying treatment is carried out to obtain modified glass fiber.

[0058] Example 3

[0059] A production process of a composite material template prepared using recycled PC templates, comprising the following steps:

[0060] (1) The recycled PC template material is placed in a twin-screw extruder for extrusion granulation. When the twin-screw extruder is granulating, it is divided into a feeding section, a plasticizing section, and a metering section. The temperature of the feeding section is 200 °C, the temperature of the plasticizing section is 230 °C, and the temperature of the metering section is 250 °C;

[0061] (2) Weigh 10 parts of recycled PC template material, 70 parts of polycarbonate, 8 parts of compatibilizer maleic anhydride grafted ABS and hyperbranched polyetheramine, 3 parts of MBS, 7 parts of butadiene rubber, 15 parts of modified glass fiber, 4 parts of dispersant polyethylene glycol, 1 part of antioxidant 168, and 0.3 part of optical stabilizer UV637 by weight and add them to a high-speed mixer to mix evenly to obtain a premix;

[0062] (3) The premix is melted and pelletized through a twin-screw extruder. When the twin-screw extruder is pelletizing, it is divided into a feeding section, a plasticizing section, and a metering section. The temperature of the feeding section is 200 °C, the temperature of the plasticizing section is 230 °C, and the temperature of the metering section is 250 °C, obtaining a composite material prepared using recycled PC templates;

[0063] (4) The composite material prepared using recycled PC templates obtained in step (3) is injection molded at a temperature of 250 °C to obtain a composite material template prepared using recycled PC templates;

[0064] Preparation of modified glass fiber:

[0065] Dissolve isopropyl tris(isostearoyl) titanate, a phthalate coupling agent, in toluene, add glass fiber, and react fully under ultrasonic oscillation. The mass of the phthalate coupling agent is 1.5% of the mass of the glass fiber, and the ultrasonic oscillation time is 25 min. After the reaction, perform a drying treatment to obtain modified glass fiber.

[0066] Example 4

[0067] The difference between Example 4 and Example 3 is that Example 4 further includes a step of modifying butadiene rubber:

[0068] S1 Put butadiene rubber, acrylic ester monomer butyl acrylate, and initiator azobisisobutyronitrile into a reaction kettle. The mass of the acrylic ester monomer is 10% of the mass of the butadiene rubber; the mass of the initiator is 0.5% of the mass of the acrylic ester monomer.

[0069] S2 React at 70 °C for 3 h under the protection of nitrogen. After the reaction, cool down and discharge to obtain modified butadiene rubber.

[0070] Example 5

[0071] The difference between Example 5 and Example 3 is that Example 4 further includes a step of modifying butadiene rubber:

[0072] S1 Put butadiene rubber, acrylic ester monomer methyl methacrylate, and initiator azobisisobutyronitrile into a reaction kettle. The mass of the acrylic ester monomer is 20% of the mass of the butadiene rubber; the mass of the initiator is 1.5% of the mass of the acrylic ester monomer.

[0073] S2 React at 100 °C for 5 h under the protection of nitrogen. After the reaction, cool down and discharge to obtain modified butadiene rubber.

[0074] Example 6

[0075] The difference between Example 6 and Example 3 is that the compatibilizer only includes 8 parts of maleic anhydride grafted ABS, and the rest are the same.

[0076] Example 7

[0077] The difference between Example 7 and Example 3 is that the compatibilizer only includes 8 parts of hyperbranched polyetheramine, and the rest are the same.

[0078] Example 8

[0079] The difference between Example 8 and Example 3 is that the mass ratio of maleic anhydride grafted ABS to hyperbranched polyetheramine is 1:1, and the rest are the same.

[0080] Example 9

[0081] Example 9 is different from Example 3 in that glass fiber is modified with KH550, and the rest are the same.

[0082] Comparative Example 1

[0083] Comparative Example 1 is different from Example 3 in that the glass fiber is unmodified, and the rest are the same.

[0084] Comparative Example 2

[0085] Comparative Example 2 is different from Example 3 in that it does not include butadiene rubber, and the rest are the same.

[0086] Comparative Example 3

[0087] Comparative Example 3 is different from Example 3 in that it does not include modified glass fiber, and the rest are the same.

[0088] Experimental Example 1 Mechanical Property Test

[0089] The composite templates prepared from the recycled PC templates prepared in Examples 1-9 and Comparative Examples 1-3 were subjected to mechanical property tests. The test methods are as follows:

[0090] Tensile strength: Conducted in accordance with ISO 527 standard;

[0091] Flexural strength: Conducted in accordance with ISO 178 standard;

[0092] Izod impact strength: Conducted in accordance with ISO 179 standard;

[0093] The test results are shown in Table 1.

[0094] Table 1 Mechanical Property Test Results

[0095]

[0096] Experimental Example 2 Abrasion Resistance Test

[0097] The composite templates prepared from the recycled PC templates prepared in Examples 1-9 and Comparative Examples 1-3 were subjected to abrasion resistance tests. The test methods are as follows: Using a TABER wear testing machine, with a load of 500 g, setting the number of test circles, adjusting the rotation speed to 60 r / min for testing, observing once every 25 wipes, recording the number of friction times when wear, abrasion marks or color change appear on the test strip, testing and recording the test results. The test results are shown in Table 2;

[0098] Table 2 Abrasion Resistance Test Results

[0099]

[0100]

[0101] As can be seen from Table 1 and Table 2, the composite template prepared by using the recycled PC template provided in this application has good mechanical properties and wear resistance on the basis of making full use of the recycled PC template material, which is of great significance for cost control and environmental protection.

[0102] As described above, the above are only examples of this application. The protection scope of this application is not limited by these specific examples, but is determined by the claims of this application. For those skilled in the art, various changes and modifications can be made to this application. Any modification, equivalent replacement, improvement, etc. made within the technical idea and principle of this application shall be included within the protection scope of this application.

Claims

1. A composite material template prepared using recycled PC template, characterized in that: Calculated by weight, it includes 5-15 parts of PC template recycled material, 60-80 parts of polycarbonate, 5-10 parts of compatibilizer, 2-5 parts of MBS, 5-8 parts of butadiene rubber, 10-20 parts of modified glass fiber, 2-5 parts of dispersant, 0.5-1 part of antioxidant and 0.2-0.5 part of optical stabilizer.

2. The composite material template prepared by using recycled PC template according to claim 1, characterized in that: The compatibilizer comprises maleic anhydride grafted ABS and hyperbranched polyether amine; and the modified glass fiber is obtained by modification with a phthalate coupling agent.

3. The composite material template prepared by using recycled PC template according to claim 2, characterized in that: The mass ratio of the maleic anhydride grafted ABS to the hyperbranched polyetheramine is (2-5):

1.

4. The composite material template prepared by using recycled PC template according to claim 1, characterized in that: The preparation method of the modified glass fiber comprises the following steps: The phthalate coupling agent is dissolved in toluene, added into glass fiber, fully reacted under ultrasonic vibration, and dried after the reaction to obtain modified glass fiber.

5. The composite material template prepared by using recycled PC template according to claim 4, characterized in that: The mass of the phthalate coupling agent is 1-2% of the mass of the glass fiber, and the time of the ultrasonic oscillation is 20-30 minutes.

6. The composite material template prepared by using recycled PC template according to claim 1, characterized in that: The method also includes the step of using acrylic ester monomers to graft-modify butadiene rubber to obtain modified butadiene rubber.

7. The composite material template prepared by using recycled PC template according to claim 6, characterized in that: The preparation method of the modified butadiene rubber comprises the following steps: S1: adding butadiene rubber, acrylic monomer and initiator into a reaction kettle; Under the protection of nitrogen, S2 is reacted at 70-100°C for 3-5h. After the reaction is completed, the temperature is lowered and the material is discharged to obtain modified butadiene rubber.

8. The composite material template prepared by using recycled PC template according to claim 7, characterized in that: The acrylic acid ester monomer includes methyl methacrylate or butyl acrylate; the initiator is azobisisobutyronitrile; the mass of the acrylic acid ester monomer is 10-20% of the mass of the butadiene rubber; the mass of the initiator is 0.5-1.5% of the mass of the acrylic acid ester monomer.

9. The production process of a composite material template prepared by using recycled PC template according to any one of claims 1 to 8, characterized in that: The following steps are involved: (1) placing the PC template recycled material in a twin-screw extruder for extrusion granulation; (2) Weighing PC template recycled material, polycarbonate, compatibilizer, MBS, butadiene rubber, modified glass fiber, dispersant, antioxidant and optical stabilizer according to weight parts, adding them into a high-speed mixer and mixing them evenly to obtain a premix; (3) melting and extruding the premixed material through a twin-screw extruder to obtain a composite material prepared using the recycled PC template; (4) injection molding the composite material prepared using the recycled PC template obtained in step (3) to obtain a composite material template prepared using the recycled PC template.

10. The production process of composite material templates prepared by using recycled PC templates according to claim 9, characterized in that: In step (1) and step (3), the twin-screw extruder is divided into a feeding section, a plasticizing section and a metering section when performing granulation. The temperature of the feeding section is 190-220° C., the temperature of the plasticizing section is 220-240° C., and the temperature of the metering section is 240-260° C.; the temperature of the injection molding in step (4) is 220-270° C.

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