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
Synthesis and properties of main-chain liquid crystalline polyurethane elastomers with azoxybenzene
β Scribed by Xudong Jia; Xiangdong He; Xuehai Yu
- Publisher
- John Wiley and Sons
- Year
- 1996
- Tongue
- English
- Weight
- 865 KB
- Volume
- 62
- Category
- Article
- ISSN
- 0021-8995
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π SIMILAR VOLUMES
## Abstract Summary: The behavior of the complex shear modulus __G__β=β__Gβ²__β+βi__Gβ³__ of a main chain liquid crystalline elastomer film oriented with the director in the plane of the film is investigated for the first time by shearing the film in a direction perpendicular or parallel to the direc
## 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
## 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 Rigid anisotropic crosslinkers have been shown to decrease the nematic order and the transition temperatures of mainβchain liquid crystalline elastomers (MCLCEs). In order to look into this phenomenon, the state of order of an anisotropic crosslinker in an MCLCE was investigated separat