文献类型：期刊文献

中文题名：嵌段聚氨酯脲的形态与性能——软链段结构和分子量的影响

英文题名：Morphology-Property Relationship of Segmented Polyurethaneurea——Influences of Soft Segment Structure and Molecular Weight

作者：修玉英[1];王得宁[1];胡春圃[1];应圣康[1];高永琪[2];李俊贤[2]

机构：[1]华东化工学院材料科学研究所;[2]化工部黎明化工研究院

年份：1993

卷号：19

期号：4

起止页码：461

中文期刊名：华东化工学院学报

外文期刊名：JOURNAL OF APPLIED POLYMER SCIENCE

收录：;国家哲学社会科学学术期刊数据库;EI(收录号：1994051256897);Scopus;WOS:【SCI-EXPANDED(收录号:WOS:A1993KX50000011)】；CSCD:【CSCD2011_2012】；

基金：国家自然科学基金

语种：中文

中文关键词：聚氨酯脲;嵌段;共聚;分子量

外文关键词：polyurethaneurea; blockcopolymer; reaction injection moulding; phase separation; structure and properties

摘要：合成了不同软链段长度的聚醚型、聚酯型嵌段聚氨酯脲弹性体,以及聚醚-聚酯软链段聚氨酯脲弹性体(PUU)。借助SEM、DSC以及拉伸试验机分析其结构、形态对力学性能的影响。研究表明,相分离程度随软链段分子量的提高而提高。在软链段分子量相同时,聚醚为基础的PUU的相分离程度较聚酯为基础的PUU高。以聚醚-聚酯为软链段的PUU呈现了聚醚型和聚酯型PUU的各自形态,有较大的相区尺寸和较明显的相界面。力学性能数据证实了形态研究的结果。
The relations of the morphology and property of several series of segmented PUU were studied in film form by using SME, DSC and tensile stress-strain data. The polyether-based and polyester-based PUU block copolymers were synthesized by using PPO-EO polyether or PBA polyester with different molecular weights, MDI and DETDA. Especially, the polyether-ester-based PUU were synthesized. The extent of phase separation inscreases with increasing molecular weight of soft segment. The polyether-based PUU shows the better phase separation than polyester-based with the same molecular weight of soft segment. The polyether-ester-based PUU shows the morphology of both polyether-based and polyesterbased PUU and with larger domain size and interface.