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研究了醋酸锌、草酸钛钾和二氧化钛三种催化剂对聚醚聚酯嵌段共聚合反应的催化作用,以及对共聚物热稳定性的影响。发现二氧化钛不仅对共缩聚反应具有良好的催化作用,且对提高共聚物的热稳定性亦有贡献。
The catalysis of three kinds of catalysts such as zinc acetate, potassium titanyl oxalate and titanium dioxide on the block copolymerization of polyether polyesters was studied, and the influence on the thermal stability of the copolymers was also studied. It is found that titanium dioxide not only has a good catalytic effect on the copolycondensation reaction, but also contributes to improving the thermal stability of the copolymer.