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Preparation method of super-tough polystyrene acrylonitrile copolymer/thermoplastic elastomer/rigid particle ternary blend

A technology of polystyrene acrylonitrile copolymer and polystyrene acrylonitrile, which is applied in the field of continuous edge-limiting pressure-induced flow processing and molding, can solve the problems of low processing efficiency and poor mechanical properties of SAN, and achieve high production efficiency, Effect of improved impact strength and low temperature

Inactive Publication Date: 2016-03-02
DALIAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problems of poor mechanical properties and low processing efficiency of SAN in the prior art, the present invention provides a continuous edge-limited pressure-induced flow molding method for polystyrene acrylonitrile copolymer / thermoplastic elastomer / rigid particle, through pressure induction Flow molding makes the polymer material produce a semi-solid flow under pressure, thereby producing a microscopic toughening structure. During the process of being impacted, each component in the system produces a synergistic toughening effect, and finally greatly toughens polystyrene acrylonitrile Copolymer

Method used

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  • Preparation method of super-tough polystyrene acrylonitrile copolymer/thermoplastic elastomer/rigid particle ternary blend
  • Preparation method of super-tough polystyrene acrylonitrile copolymer/thermoplastic elastomer/rigid particle ternary blend
  • Preparation method of super-tough polystyrene acrylonitrile copolymer/thermoplastic elastomer/rigid particle ternary blend

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] SBS / SAN / nano CaCO3 The specific steps of the pressure-induced flow molding method of the system are as follows:

[0032] (1) The linear SBS (where S / B is 4 / 6), SAN and nano-CaCO 3 Dry at 70-80°C for 5 hours, then weigh according to the mass ratio of SAN:SBS=85 / 15 and add 0.1% of the total mass of SAN and SBS nano-CaCO 3 to mix. The ternary system is uniformly blended by high-strength shearing of the building-block twin-screw, and the temperature of the fourth stage of the twin-screw is set within the range of 150-235°C (zone 1: 150°C, zone 2: 200°C, zone 3: 230°C ℃, four zones: 235℃), and extruded through different die heads, preformed into wire or plate parisons with uniform thickness, and directly transported to the limited edge rolling through the temperature-controlled tunnel (temperature control is 80-130℃) device.

[0033] (2) Press the plate parison with a thickness of 4mm and a width of 5mm at 100°C with compression ratios of 1.0, 1.2 and 1.7, respectively, w...

Embodiment 2

[0040] SBS / SAN / nano CaCO 3 The specific steps of the pressure-induced flow molding method of the system are as follows:

[0041] (1) Thermoplastic elastomer (SBS is linear, wherein the ratio of S / B is 4 / 6), SAN and nano-CaCO 3 Dry 5 hours under the condition of 70-80 ℃, be SAN by mass ratio then: thermoplastic elastomer=85 / 15 and add the nano-CaCO of SAN and thermoplastic elastomer gross mass 1% 3 to mix. The ternary system is uniformly blended by high-strength shearing through the building-block twin-screw, and the temperature of the fourth stage of the twin-screw is set within the range of 150-235°C (zone 1: 150°C, zone 2: 200°C, zone 3: 230°C, zone 4 Zone: 235°C), extruded through different die heads, preformed into wire or plate parisons with uniform thickness, and directly transported to the edge-limiting rolling device through a temperature-controlled tunnel (temperature control is 80-130°C).

[0042] (2) Compress the plate parison with a thickness of 4mm and a width ...

Embodiment 3

[0049] The difference between this embodiment and embodiment 1 is that the compression ratio and the rigid particles of the third component are different. The compression ratio of this embodiment is 1.7, and pure SAN, Cu powder (Cu powder is 200 mesh), nano MMT, nano SiO 2 , Nano CaCO 3 , Nano TiO 2 And zeolite is added to the SBS / SAN system as rigid particles. As shown in Table 3, the data obtained from the impact test of the material sample strip prepared under the condition of SBS / SAN (15 / 85) 0.1% rigid particle ternary system parison at 100°C and the compression ratio of 1.7.

[0050] Table 3 Effect of adding different rigid particles on the performance of SBS / SAN(15 / 85) ternary system

[0051]

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Abstract

Belonging to polymeric material physics and polymeric material processing field, the invention relates to a preparation method of a super-tough polystyrene acrylonitrile copolymer / thermoplastic elastomer / rigid particle ternary blend. The method includes: mixing a thermoplastic elastomer and a polystyrene acrylonitrile copolymer according to a mass ratio of (1-30):(70-100), adding rigid particles accounting for 0.1-3% of the total mass of the mixture, and performing blending to obtain a preformed parison, and carrying out pressing with an edge defined rolling device so as to obtain the super-tough polystyrene acrylonitrile copolymer / thermoplastic elastomer / rigid particle ternary blend. According to the invention, by means of the continuous edge defined pressure induced flow forming processing method, a high impact resistant microscopic lamellar structure can be formed, and the impact strength can be increased by more than 5 times; while the material toughness is greatly improved, the strength of the material itself is also enhanced, at the same time the heat resistant temperature is raised, and the processing properties of the prepared material are improved; and the continuous processing method has low energy consumption and high production efficiency, and is suitable for mass production.

Description

technical field [0001] The invention belongs to the field of polymer material physics and its processing, and in particular relates to a continuous boundary pressure-induced flow processing molding method of thermoplastic elastomer, polystyrene acrylonitrile copolymer and rigid particles of the third component. Background technique [0002] Polystyrene acrylonitrile copolymer (SAN for short) is a hard, colorless and transparent thermoplastic. The styrene component contained in it makes SAN hard, transparent and easy to process; the acrylonitrile component makes SAN chemically stable and thermally stable. Compared with polystyrene, it has higher impact strength, and improves heat resistance, oil resistance, chemical corrosion resistance and stress crack resistance, and has better resistance than acrylonitrile-butadiene-styrene (ABS). Weather resistance, the highest service temperature is 75-90°C, compared with general-purpose polystyrene (GPPS), it has good mechanical streng...

Claims

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Application Information

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IPC IPC(8): C08L25/12C08L53/02C08L55/02C08K3/26B29C69/02B29C47/00B29C43/24B29C43/52B29C43/58
CPCB29C43/24B29C43/52B29C43/58B29C48/00B29C69/02C08L25/12C08L2201/08C08L53/02C08K2003/265C08L55/02
Inventor 张森王世伟郭静宫玉梅张鸿夏英刘元法于跃拖晓航管福成王达王晓鹏关丽吴波赵园园
Owner DALIAN POLYTECHNIC UNIVERSITY
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