Citation: Yan Qing LIAN, Ming Qi LI, Qi Xiang ZHOU, De Shan LIU. Synthesis of Bis(4'-hydroxyphenyl)-toluene-2, 4-diurethane for Main Chain Liquid Crystalline Poly(urethane-ester)s[J]. Chinese Chemical Letters, ;1998, 9(5): 439-442. shu

Synthesis of Bis(4'-hydroxyphenyl)-toluene-2, 4-diurethane for Main Chain Liquid Crystalline Poly(urethane-ester)s

Institute of Polymer Science and Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084

Received Date: 18 December 1997

A new methodology was advanced that mesogenic cores appeared after the formation of urethane groups and during the monomer-to-polymer transition. A new diphenol monomer, bis(4'-hydroxy-phenyl)-toluene-2,4-diurethane (BHPTU), was obtained by the reaction of 2,4-tolulene diisocyanate with hydroquinone in dioxane or N,N-dimethyl-acetamide. The reaction process was monitored by FTIR, and the product was investigated by ¹HNMR and elemental analysis (EA). A liquid crystalline poly(urethane-ester) was obtained using the BHPTU monomer.
- liquid crystalline polymer,
- poly(urethane-ester),
- synthesis
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