Blends of liquid crystalline polyester-polyurethane and epoxy: Preparation and properties

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...

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Bibliographic Details
Published in:Journal of applied polymer science 2003-04, Vol.88 (3), p.783-787
Main Authors: Tan, Song Ting, Wei, Chun, Wang, Xia Yu, Zhang, Ming Qiu, Zeng, Han Mim
Format: Article
Language:English
Subjects:
Applied sciences
blends
Exact sciences and technology
liquid-crystalline polymers (LCP)
Organic polymers
Physicochemistry of polymers
Polymers with particular structures
Preparation, kinetics, thermodynamics, mechanism and catalysts
resins
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Summary: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
ISSN:0021-8995
1097-4628
DOI:10.1002/app.11553