永久抗静电PC/ASA材料的耐水解性分析研究

Study on hydrolysis resistance of permanent antistatic PC/ASA material

PC/ASA材料属于聚碳酸酯合金类,兼具PC和ASA的特性,表现为抗冲击、耐热、光泽度优良,且还具有优异的耐候性和耐化学品性,被广泛应用于汽车、商用机器设备、消费电子产品等方面。随着PC/ASA合金应用范围的扩大,对PC/ASA合金提出了功能化、高性能化的要求。永久抗静电性能就是汽车行业对其提出的一个要求。但是,由于聚碳酸酯(PC)和丙烯腈-苯乙烯‐丙烯酸酯接枝共聚物(ASA)含有大量的酯基高极性基团,且抗静电剂是一种亲水性聚合物,故在温度较高和相对湿度较大时,水与聚合物分子链的极性基团发生反应从而引起材料降解。发生水解的PC/ASA合金则会失去抗静电性能,甚至导致颜色变化、机械性能严重下降等。

As polycarbonate alloy,PC/ASA material which has the characteristics of PC and ASA,showing shock resistance,heat resistance,good gloss,and also has excellent weather and chemical resistance,is widely used in automobiles,commercial equipment and consumer electronic products.With the expansion of the application range of PC/ASA alloy,the requirement of functionalization and high performance for PC/ASA alloy has been put forward.Permanent antistatic property is a requirement of automobile industry.However,because of polycarbonate（PC） and acrylonitrile-styrene-acrylate graft copolymer（ASA） containing a large number of ester high polar group,and the antistatic agent is a hydrophilic polymer,when the temperature and the relative humidity is higher,the water reacts with the polar group of the polymer chain,which leads to the degradation of the material.Hydrolysis of PC/ASA alloy will lose antistatic properties,and even leads to color changes or a serious decline in mechanical properties.