文献类型：期刊文献

中文题名：具有明确硬段结构的水性聚氨酯脲的研究

英文题名：STUDIES OF A WELL-DEFINED MODEL HARD SEGMENT AND WATERBORNE POLYURETHANEUREA

作者：杨冬亚[1];胡春圃[1];张志平[1];应圣康[1]

机构：[1]华东理工大学材料科学与工程学院超细材料制备与应用教育部重点实验室,上海200237

年份：2006

卷号：16

期号：3

起止页码：461

中文期刊名：高分子学报

外文期刊名：Acta Polymerica Sinica

收录：CSTPCD;;Scopus;WOS:【SCI-EXPANDED(收录号:WOS:000238403200017)】；北大核心:【北大核心2004】；CSCD:【CSCD2011_2012】；

基金：上海市科委纳米专项基础研究项目(项目号0212nm008)

语种：中文

中文关键词：分子设计;硬段模型化合物;序列结构;水性聚氨酯;耐水性

外文关键词：Molecular design, Model hard segment compound, Sequence distribution, Waterborne polyurethancurea, Water resistance

摘要：通过逐步反应由4,4′-二苯基甲烷二异氰酸酯、2,2-二羟甲基丙酸和1,4-丁二醇,合成了结构明确的硬段模型化合物.通过13C NMR对其序列结构进行了表征,并通过FTIR、DSC和WAXD对其形态结构进行了研究.进一步制备了具有这类规整结构硬段的水性聚氨酯脲,初步考察了水分散液及其成膜后的性能.实验结果表明,这类聚氨酯脲水分散液的粒径小于110nm,在室温下贮存期大于一年,成膜后具有优异的耐水性能以及表面疏水性能.
A well-defined model hard segment was synthesized with 4, 4＇-diphenylmethane diisocyanate, dimethylolpropionic acid and 1,4-butanediol by means of fractional steps. The sequence distribution of the model hard segment was measured by ^13 C-NMR and its structure and morphology were characterized by FT-IR, DSC and WAXD. A series of polyester based polyurethaneurea （PUU） aqueous dispersions with this well-defined hard segment were prepared. The physical properties of PUU aqueous dispersions and their films were measured. The experimental results showed that the particle size of the aqueous dispersions decreased with increasing the hard segment content from 110 nm to 72 nm, and they were very stable at ambient temperature （more than one year）. Furthermore, the films prepared with such PUU aqueous dispersions exhibited the excellent water resistance, i. e. low equilibrium water absorbing capacity （at around 5 wt% ） and high contact angle of water on the surface （more than 100°）.