ABS resin has good stability, electrical properties and wear resistance

ABS resin is currently the largest and most widely used polymer. It organically unifies the various properties of PS, SAN and BS, and has excellent mechanical properties with balanced toughness, hardness and rigidity. ABS engineering plastics have excellent comprehensive properties, excellent impact strength, good dimensional stability, electrical properties, abrasion resistance, chemical resistance, dyeing properties, and good molding and mechanical processing. ABS resin is resistant to water, inorganic salts, alkalis and acids, insoluble in most alcohols and hydrocarbon solvents, but easily soluble in aldehydes, ketones, esters and some chlorinated hydrocarbons.

ABS resin maintains the excellent electrical properties and easy processing and formability of styrene, and increases elasticity, strength (characteristics of butadiene), heat resistance and corrosion resistance (excellent properties of acrylonitrile), and has high surface hardness, resistance to It has good chemical properties, and at the same time, by changing the ratio of the above three components, various properties of ABS can be changed, so ABS engineering plastics have a wide range of uses, mainly used in machinery, electrical, textile, automobile and shipbuilding industries.

The performance of ABS is between general plastics and engineering plastics. It has good impact resistance, basically no notch sensitivity, excellent fluidity, and relatively cheap price, so it is widely used. However, its heat resistance and weather resistance are poor, and its mechanical properties are not ideal, so its application is limited. ABS can be obtained by various polymerization methods such as emulsion grafting, emulsion blending, emulsion bulk polymerization and continuous bulk polymerization.

The combined plastic of PC and ABS can overcome the shortcomings of the two raw materials and develop the advantages of each other. After blending the two, one can improve the heat resistance, impact and tensile strength of ABS, and the other can reduce the polycarbonate Melt viscosity, improve processability, reduce PC notch sensitivity, improve PC stress cracking condition, and reduce production cost. Especially because PC/ABS composite plastics provide better overall cost and excellent low temperature notched impact strength, PC/ABS composite plastics have been rapidly developed and applied, and their development speed has exceeded PC, ABS itself and other PC composite plastics development speed. The overall superior heat resistance, strength and processability are the reasons for the rapid development of PC/ABS composite plastics. Therefore, PC/ABS composite plastics with PC as a continuous phase have a broader application market.

The microstructure of PC/ABS composite plastics is very complex, which has three phases of PC, SAN and grafted butadiene rubber. If the PC content is high, the PC becomes a continuous phase surrounding the SAN, which in turn surrounds the grafted rubber phase, and the grafted rubber may contain the SAN phase. Rubber particles exist as stress concentration centers in composite plastics. When subjected to external force, they can induce crazing and shear bands. The generation and development of crazing and shear bands require energy absorption. The more the two are generated, the more energy The more absorption, at the same time, the rubber particles can inhibit the growth of the craze and prevent the craze from developing into destructive cracks, so the presence of the rubber phase can improve the impact strength of the material. As the ABS content in the composite plastic increases, the rubber phase content also increases, and the impact strength of the composite plastic also increases due to the reasons mentioned above; when the ABS content continues to increase and exceeds 50%, the blending system continues to become ABS, This is not conducive to the induction of shear bands, which leads to a decrease in impact strength.

Select PET as matrix material, ABS as reinforcing material, add the third component as compatibilizer, and prepare PET/ABS alloy material by twin-screw extrusion blending method or injection molding method. ABS/PET composite plastic can be more Widely meet the needs of the market.

PET and ABS are partially compatible systems. The effective means to obtain excellent comprehensive properties for incompatible plastics is to improve the interfacial compatibility. There have been many reports suggesting that some homopolymers, block copolymers or graft polymers are Can be effectively used as a polymer compatibilizer.