PC/PBT共混体系的研究 Ⅰ.PC、PBT熔融共混时的酯交换反应

Studies of PC/PBT Blend System (Ⅰ) The transesterification taking place in molten blends of PC and PBT

采用红外光谱、核磁共振等测试手段，系统地研究了ＰＣ、ＰＢＴ熔融共混时的酯交换反应，发现ＰＢＴ中残余的Ｔｉ催化剂会对酯交换反应起催化作用。通过加入能和Ｔｉ催化剂络合的添加剂，可以控制酯交换程度，这为控制ＰＣ／ＰＢＴ合金的性能提供了一个非常有效的方法。

In this paper, the transesterification taking place in molten blends of PC and PBT was systematiclly studied by IR and 1 H NMR. The transesterification can be catalyzed by the titanium resedue presented in PBT and can be stopped at various levels by some additives capable of complexing the titanium catalyst. This provides a very useful method of controlling the properties of PC/PBT blends .