保定市清苑区模板加工厂

pp粘度高，流动性好，对压力较敏感，收缩率大．abs具有吸湿性，加工温度较高，对各种工艺变化比较敏感，对模温有一定要求． ABS是由丙烯腈、丁二烯和苯乙烯三种化学单体合成。每种单体都具有不同特性： 丙烯腈有高强度、热稳定性及化学稳定性；丁二烯具有坚韧性、抗冲击特性； 苯乙烯具有易加工、高光洁度及高强度。从形态上看，ABS是非结晶性材料。 三中单体的聚合产生了具有两相的三元共聚物，一个是苯乙烯-丙烯腈的连续相， 另一个是聚丁二烯橡胶分散相。

PP has high viscosity, good fluidity, pressure sensitivity, high shrinkage,.Abs has hygroscopicity, high processing temperature, is sensitive to various process changes, and has certain requirements for mould temperature..ABS is synthesized from three chemical monomers of acrylonitrile, butadiene and styrene. Each monomer has different characteristics: acrylonitrile has high strength, thermal stability and chemical stability; butadiene is tough and impact resistant; styrene is easy to process, high gloss and high strength. In terms of morphology, ABS is a non crystalline material. The polymerization of the three middle monomers produces a three - phase copolymer of two phases, one is a continuous phase of styrene - acrylonitrile, and the other is a polybutadiene rubber dispersion phase.