Premium
Blends of liquid crystalline polyester–polyurethane and epoxy: Preparation and properties
Author(s) -
Tan Song Ting,
Wei Chun,
Wang Xia Yu,
Zhang Ming Qiu,
Zeng Han Mim
Publication year - 2003
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.11553
Subject(s) - thermotropic crystal , materials science , epoxy , polyester , ultimate tensile strength , polyurethane , liquid crystal , composite material , glass transition , mesogen , izod impact strength test , polymer , liquid crystalline , optoelectronics
A novel liquid crystalline polyester–polyurethane (LCPU) that contains polyester mesogenic units was synthesized in the present work. Through a careful investigation of the structure and morphology of the LCPU, it was found that the home‐synthesized LCPU is a highly birefringent thermotropic nematic liquid crystal. After being blended with bisphenol‐A epoxy, the liquid crystalline polymer can, simultaneously, improve the impact strength and the glass transition temperature as well as the tensile strength and the tensile modulus of the blends. It was proved to be an efficient toughening agent for epoxy without the expense of other properties. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 88: 783–787, 2003