The role of toughening agent?

塑料增韧剂的作用是改善高分子材料的高温韧性和低温抗冲击能力，及其材料拉伸、耐疲劳性，赋予塑料更高的物理-化学机械性能。

The effect of plastic toughening agent is to improve the high temperature toughness and low temperature impact resistance of the polymer, and the tensile and fatigue resistance of the material, and give the plastics higher physical and chemical mechanical properties.

增韧剂有哪些？

What are the toughening agents?

增韧剂功能的选择性这句话是什么意思呢，可以举例说明一下，大家就是会明白。可以从二个方面去理解。

What do you mean by the selectivity of the toughening agent? You can give an example. It can be understood from two aspects.

一．不同塑料（如PC,ABS,PBT,PET,PA ,PPO,PP等）使用的增韧剂类型是有所差异的（从最适合的角度上讲），或许说的有的增韧剂可以用在多个塑料中增韧，但是从性价比上不一定适合，而有的增韧剂是根本不适合应用在另一种塑料。这个很好理解。

1. The types of toughening agents used in different plastics (such as PC, ABS, PBT, PET, PA, PPO, PP, etc.) are different (from the most suitable point of view), and some of the toughening agents may be toughened in multiple plastics, but it is not necessarily suitable for the cost performance, while some toughening agents are not suitable for application in another kind of plastics. This is a good understanding.

二．某一塑料可以用多种增韧剂，但所起到的作用是有差异的，或许说某一塑料能用几种增韧剂是去增韧都可以，但从精细化角度考虑，我们应该想想是不是适合东西用在最适当的地方。这一点有的人或许有所忽略思考。

Two. A certain plastic can be used in a variety of toughening agents, but the effect is different. Perhaps a certain plastic can be toughened with several toughening agents, but from the fine point of view, we should consider whether it is suitable for things in the most suitable place. Some people may have neglected to think about it.