酯交换抑制剂对PC/PBT合金性能的影响研究  

The Effects of Transesterification Inhibitor on the Properties of PC/PBT Alloy

作　　者：初立秋[1] 刘建叶[1] 张师军[1] 邓起垚 CHU Li-qiu;LIU Jian-ye;ZHANG Shi-jun(Sinopec Beijing Research Institute of Chemical Industry,Beijing 100013,China)

机构地区：[1]中国石油化工股份有限公司北京化工研究院,北京100013 [2]不详

出　　处：《塑料工业》2021年第S01期143-148,共6页China Plastics Industry

摘　　要：通过添加磷酸二氢钠(NaH_(2)PO_(4))或六偏磷酸钠((NaPO_(3))_(6))制备了不同酯交换抑制剂含量的聚碳酸酯/聚对苯二甲酸丁二醇酯(PC/PBT)合金,并对其力学性能、动态力学性能、耐热性能、相形态以及流变性能进行了研究。结果表明:二者均具有酯交换抑制作用,其中,NaH_(2)PO_(4)对PC/PBT合金酯交换的抑制效果较好。NaH_(2)PO_(4)对断裂伸长率、模量及热变形温度变化不大,冲击强度有所增加,当质量分数为0.25%时,PC富相的T_(g1)为105.94℃,对合金的流变性能没有很大影响。(NaPO_(3))_(6)则会降低断裂伸长率,增大共混物的黏度。Polycarbonate(PC)/polybutylene terephthalate(PBT)alloys with different contents of transesterification inhibitor were prepared by addition of sodium dihydrogen phosphate(NaH_(2)PO_(4))or sodium hexametaphosphate((NaPO_(3))_(6)).Mechanical properties,dynamic mechanical analysis,phase morphology and rheological properties were investigated.The results show that both NaH_(2)PO_(4) and(NaPO_(3))_(6)have the inhibition function of transesterification,and NaH_(2)PO_(4) is better.The effects of NaH_(2)PO_(4)on elongation at break,modulus and heat deflection temperature are weak,but could enhance impact strength.The glass transition temperature(T_(g1))of PC phase reaches 105.94℃when the amount of NaH_(2)PO_(4)is 0.25%.There is little effect on rheological properties of PC/PBT alloy with NaH_(2)PO_(4)as inhibitor.(NaPO_(3))_(6)could decrease elongation at break and increase viscosity of the blends.

关 键 词：PC/PBT 酯交换 相形态 力学性能 

分 类 号：TQ323.41[化学工程—合成树脂塑料工业]