期刊论文

中文

南华大学学报(自然科学版)

1673-0062

2013

27

2

58-62,71

10.19431/j.cnki.1673-0062.2013.02.012

国家自然科学基金资助项目（21104031）； 湖南省自然科学基金资助项目（08JJ4024）；

本校为第一机构

以混合二异氰酸酯和聚醚二元醇为单体、N-甲基二乙醇胺为亲水扩链剂,合成了一种阳离子型水性聚氨酯.其固含量可达46.70%,合成的乳液具有二元分散粒径分布,其成膜的吸水性仅为3.665%,断裂伸长率高达1 512.88%,TG分析表明该膜在250℃开始降解,在460℃已完全失重.结果表明所合成的水性聚氨酯固含量较高,同时具有良好的力学性能和综合性能.

One kind of cationic waterborne polyurethane was prepared by the step-growth polyaddition process of mixed diisocyanates and polyether dibasic alcohol with N - methyl diethanolamine as hydrophilic chain extender. Its solid content was up to 46.70%. The particle size distribution of the emulsion had bimodal particle size distribution. The water absorption of its membrane form was as low as 3. 665% while the breaking elongation the film can reach 1512.88%. TG analysis degradate at 250 ℃ and became completely showed that the formed membrane began...