Synthesis and properties of liquid crystalline polyurethanes
β Scribed by Haobo Xin; Yunfeng Zhang; Zheng Xing
- Book ID
- 107373479
- Publisher
- Higher Education Press and Springer
- Year
- 2006
- Tongue
- English
- Weight
- 508 KB
- Volume
- 1
- Category
- Article
- ISSN
- 1673-3495
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Novel type of mesogenic chain extenders used in this study are N,NΠ-bis(4hydroxyphenyl)-3,4,3Π,4Π-biphenyldicarboxyimide (BPDI) and N, NΠ-bis[4-(6-hydroxyhexyloxy) phenyl]-3,4,3Π,4Π-biphenyldicarboxyimide (BHDI). BHDI has a flexible spacer of 6-methylene units but BPDI does not. The liquid crystalli
## SYNOPSIS Four series of thermotropic polyurethane elastomers (TPUEs) were synthesized in this study. The hard segments were formed by using 4,4'-methylenedicyclohexyl diisocyanate (H,,MDI) reacted with various mesogenic units, such as benzene-1,4-di(4-iminophenoxyn-hexanol), benzene-1,4-di(4-im
## Abstract Sideβchain liquidβcrystalline (SCLC) polyurethane elastomers with methoxybiphenyl mesogens pendant on the chain extenders were synthesized by the conventional prepolymer technique and condensation reaction. Two SCLC polyurethanes with mesogens having spacers of six and eight methylene u