摘要
为提高水性聚氨酯涂层的力学性能及耐水性能,制备了一系列可紫外光固化的水性端丙烯酸酯基聚氨酯。以甲苯-2,4-二异氰酸酯(TDI)、聚乙二醇(PEG)、2,2-二羟甲基丙酸(DMPA)和甲基丙烯酸-β-羟乙酯(HEMA)为原料,采用1H-NMR(核磁共振)分析,表明仅有15%以下的异氰酸酯基参与了副反应。采用动态光散射技术分析,表明聚氨酯分散体的粒径随DMPA含量的增加而减小。测试了紫外固化涂层的玻璃化转变温度、硬度及耐水性。结果表明,固化涂层的耐水性能很好,且随聚氨酯中端丙烯酸酯基含量的增加,固化涂层的热性能和力学性能均有提高。
A series of waterborne UV curable acrylated polyurethanes were synthesized with the objective to improve their mechanical properties and resistance to water. Toluene 2, 4 diisocyanate （TDI）, polyethylene glycol （PEG）, 2, 2-dimethylolpropionic acid （DMPA）, and βhydroxyethyl methacrylate （HEMA） were used as the raw materials. ^1H-NMR analysis shows that less than 15% of the isocyanate groups participated in side reactions during the synthesis reaction. Dynamic light scattering measurements show that the particle size in the dispersions decreased with increasing DMPA content in the polymers. The resistance to water of the cured coatings is better than that of uncured coatings. Both the glass transition temperature and the hardness of the cured coatings increased with increasing acrylate group content in the polymers.
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2007年第6期867-869,884,共4页
Journal of Tsinghua University(Science and Technology)
基金
黑龙江省自然科学基金资助项目(D2005-13)
关键词
水性聚氨酯
端丙烯酸酯基
紫外光固化
涂料
waterborne polyurethane
terminal acrylate group
UV-curing
coating
作者简介
王浩（1981-），男（汉），河北，硕士研究生。
通讯联系人：唐黎明，副教授，E—mail；tanglm@mail．tsinghua．edu．cn
