文献类型：期刊文献

英文题名：STUDY OF THE DOMAIN-STRUCTURE AND MECHANICAL-PROPERTIES OF THE ETHYLENE-OXIDE ENDCAPPED POLY(PROPYLENE OXIDE) POLYOL 4,4'-DIPHENYLMETHANE DIISOCYANATE ETHYLENEDIOL POLYURETHANE SYSTEM

作者：Wang, Gengchao[1]; Fang, Bin[1]; Zhang, Zhiping[1]

机构：[1] East China Univ of Chemical, Technology, Shanghai, China

年份：1994

卷号：35

期号：15

起止页码：3178

外文期刊名：POLYMER

收录：;EI(收录号：1994122403548);WOS:【SCI-EXPANDED(收录号:WOS:A1994NZ51500006)】；

语种：英文

外文关键词：POLYURETHANES; ELECTRON MICROSCOPY; DOMAIN STRUCTURE

摘要：Polyurethanes from a system consisting of ethylene oxide endcapped poly(propylene oxide) polyol (PPO-EO), 4,4'-diphenylmethane diisocyanate (MDI) and ethylenediol (EDO) have been synthesized using a one-step process. The morphology of these polyurethanes has been investigated by a variety of techniques. Hard-segment-rich spherulites, with sizes of 10 mum in diameter, consisting of scattering fibrils, have been observed. The melting points of these spherulites lie in the range 220-260-degrees-C. The degree of microphase separation and the crystallinity of the polyurethanes increases with an increase in the hard-segment content. In addition, a relationship between the microstructure and the mechanical properties of these materials has been found.