文献类型：期刊文献

中文题名：嵌段聚氨酯脲的序列分布研究

英文题名：STUDY ON THE SEQUENCE DISTRIBUTION OF SEGMENTED POLYURETHANEUREA

作者：修玉英[1];罗钟瑜[1];王得宁[1];张志平[1];应圣康[1]

机构：[1]华南理工大学材料科学研究所,华东理工大学材料科学研究所

年份：1994

卷号：22

期号：6

起止页码：94

中文期刊名：华南理工大学学报（自然科学版）

外文期刊名：Journal of South China University of Technology(Natural Science Edition)

收录：CSTPCD;;EI(收录号：1995072803730);Scopus;CSCD:【CSCD2011_2012】；

基金：国家自然科学基金

语种：中文

中文关键词：嵌段共聚物;NMR;PUU;聚氨酯脲

外文关键词：s: polyurethane; sequences, block copolymers, nuclear magneticresonance

摘要：用高分辩１３ＣＮＭＲ技术研究了不同硬段浓度的聚醚型嵌段聚氨酯脲（ＰＵＵ）弹性体的序列长度和序列分布。结果表明，ＰＵＵ的硬段平均序列长度随ＰＵＵ中聚脲的摩尔浓度增加而增加；嵌段ＰＵＵ内软硬段的链结构也随聚脲摩尔浓度的增加由交替共聚向嵌段共聚变化，硬段浓度愈高，嵌入的硬段长度也愈大。
Segmented Polyurethaneureas (PUUs) were prepared from linear poly(Propylene oxide) polyether, 4, 4 '-diphenylmethane diisocyanate (MDI) anddiethyltoluene diamine (DETDA) by the two-step solution polymerhation. 13C NMRspectra of the PUUs were measured and the mean sequence lengths ofpolyurethane block and polyurea block were estimated from the signals ofaromatic carbons. The mean sequence lengths of hard segments increased withthe increasing molar fraction of polyurea. Also, the blockness increased withthe increasing hard segment concentration.