发泡PP中ZnO及注塑工艺对AC分解的影响

The Effect of ZnO and Injection Technics for AC Decomposability in Foaming PP

对发泡PP产品进行热重分析，提出了一种测量AC分解率的新方法。研究并讨论ZnO的加入量、注塑温度、冷却时间、背压等工艺参数对AC分解的影响。结果表明：AC含量在0．4％-0．7％时ZnO与AC的质量比为1：1；AC含量在0．7％～1．0％时ZnO与AC的质量比为1：2，此时AC的分解效果很好。提高注塑温度、延长冷却时间和增大背压可以使AC的分解率提高，反之则降低。

TG analyse for foamed PP, received a new method of measure AC decomposability, and then studied and discussed quality of ZnO,injection temperature,cooling time,back press for effect of AC decomposability, Results showed that the quality of ZnO ：AC was 1： 1 when AC was between 0.4% and 0.7%, the quality of ZnO： AC was 1： 2 when AC was between 0.7% and 1.0%, effect of AC decomposability is good. AC decomposability could be increased through heighten injection temperature, prolong cooling time and augment back press, the opposition was reduced.