Application and development of PC and its alloys Application and development of PC and its alloys Abstract: This paper briefly describes the performance and application of PC and several common alloys. The performance, technology and development direction of PC/ABS alloy are introduced in detail. Keywords: PC PC/ABS performance alloy application development Polycarbonate (PC) is a general engineering plastic with excellent comprehensive performance. Its output and consumption are second only to nylon (PA). PC has excellent properties such as high impact strength, good creep resistance and dimensional stability, good heat resistance (130℃), chemical resistance, transparency, low water absorption, excellent dielectric properties, strong low-temperature impact resistance, and good cold resistance (brittle temperature up to -100℃). Therefore, it is widely used in automobiles, aircraft, electronics, electrical, household appliances, information, machinery and other fields. The finished products include automobile dashboards, decorative panels, deflectors, wheel covers, instrument covers, headlight covers, household appliance parts, lighting fixtures, computer housings, terminal blocks, brackets, coil skeletons, instrument housings, sockets, optical discs (CD, DVD), washers, sleeves, printed circuit boards, optical machinery (medical equipment), bearings, gears, electric meter drums, aircraft cockpit covers, camera parts, switches, handles, buttons, helmets, signs, beverage utensils, etc. However, due to the high rigidity and large steric hindrance of the PC molecular chain, it has a high melt viscosity, so it is difficult to process and difficult to make large products. The residual stress of the products is large and stress cracking is prone to occur. In addition, PC has poor solvent resistance and wear resistance, and its price is high. These shortcomings limit its application in many fields. Therefore, it is very necessary to modify PC. The modification of PC includes chemical modification and physical modification. Chemical modification is to change the molecular structure through grafting, copolymerization and other methods to change the performance of PC; physical modification is to use mechanical blending to blend other polymers or modifiers with PC to achieve a relatively uniform single-phase or multi-phase system at the microscopic level, thereby enhancing the performance of PC. Physical modification is increasingly widely used due to its low investment, quick results, and simplicity. Common physical modification methods include: enhancement modification, flame retardant modification, heat resistance modification, and blending modification with other polymers. PC blending alloy is an important method for PC modification, which can make its performance complement each other and be more perfect and be more widely used. ……
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