【摘要】 用13C NM R 考察了添加扩链剂进行反应性共混后PET/PBT 的结构变化。在共混初期,检测不到嵌段共聚物的存在,可能与其含量极少有关。随着共混时间的增加,开始出现酯交换反应,且酯交换度随共混时间和温度而增加。扩链剂的加入能促进酯交换反应,但扩链剂的用量对酯交换的影响并不大更多还原

【Abstract】 The main structure of reactive blends of PET/PBT embodied with chain extender was studied by means of 13 C NMR. Block copolymer was too little to be observed during the initial stage of blending. With prolonged blending time, the degree of transesterification increased gradually. The higher the blending temperature, the larger the degree of transesterification. This interchange reaction could be promoted by the addition of chain extender (PBO), but the amount of chain extender seems to have negligible effect on transesterification.更多还原