新型超支化聚合物聚氨酯的合成

研究了由丁二酸酐和二乙醇胺为起始原料合成超支化聚合物的方法；采用分步反应合成出了几种聚氨酯类超支化聚合物。考察了反应时间、带水剂、封端剂及其配比对反应结果的影响。试验结果表明，第1步反应时间为3h，第2步缩和脱水反应时间为8h(甲苯为带水剂)，第3步用脱水剂封端脱水为48h；甲苯为较好的带水剂；带水剂、封端剂及其配比对产品粘度、溶解性、颜色等影响不大；产物的比浓对数粘度在0．02dL/g左右。

Synthesis of New Hyperbranced Polymers Polyurethane

It was studied that the synthesis process of hyperbranched polymers from succinic anhydride and diethanolanmine. Several polymers of polyurethane were synthesized using synthesis method of several steps. The effects of time-reaction, water-taking agent , capping agent and their ratio on reaction were investigated. The results showed that it took 3 h for the first step, 8 h for the second step (condensating-dehydrating toluene as water-taking agent) and 48h for the third step (capping-dehydrating using dehydrating agent). Toluene was suitable water-taking agent. Water-taking agent, capping agent and their ratio didn't largely affect the viscosity, solubility and colourity of product. And the inherent viscosity of product was about 0.02 dL/g.