| Synthesis of Bis(4'-hydroxyphenyl)-toluene-2, 4-diurethane for Main Chain Liquid Crystalline Poly(urethane-ester)s |
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| 引用本文： | Yan Qing LIAN, Ming Qi LI, Qi Xiang ZHOU, De Shan LIU(Institute of Polymer Science and Engineering,Department of Chemical Engineering,Tsinghua University,Beijing 100084). Synthesis of Bis(4'-hydroxyphenyl)-toluene-2, 4-diurethane for Main Chain Liquid Crystalline Poly(urethane-ester)s[J]. 中国化学快报, 1998, 0(5) |
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| 作者姓名： | Yan Qing LIAN Ming Qi LI Qi Xiang ZHOU De Shan LIU(Institute of Polymer Science and Engineering Department of Chemical Engineering Tsinghua University Beijing 100084) |
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| 作者单位： | Institute of Polymer Science and Engineering，Department of Chemical Engineering，Tsinghua University，Beijing 100084 |
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| 摘 要： | Intr0ducti0nLiquidcrystallinepoIyurethaneshaveattractedconsiderableinterestsinceIimura1andhiscoworkersobtainedtheminl98l.M0stofthep0lyurethanesthathaveappearedinliteraturewerebasedonasinglemes0gen(diisocyanateordiol),whichhadbeenreactedwith0nec0unterpart(di0l0rdiisocyanate)togiveap0lyurethane.Inprevi0usinvestigations'-',compoundsusedasmesogensallhadcompletemesogeniccores,whethertheyhadliquidcrystalpropertiesornot.Thisimpliesthatthemes0geniccoresexistedbeforetheformationoftheurethanegroupsorth…
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Synthesis of Bis(4'-hydroxyphenyl)-toluene-2, 4-diurethane for Main Chain Liquid Crystalline Poly(urethane-ester)s |
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| 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, 0(5) |
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| Authors: | Yan Qing LIAN Ming Qi LI Qi Xiang ZHOU De Shan LIU |
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| Abstract: | A new methodology was advanced that mesogenic cores appeared after theformation of urethane groups and during the monomer-to-polymer transition. A newdiphenol monomer, bis(4'-hydroxy-phenyl)-toluene-2 (BHPTU), was obtainedby the reaction of 2,4-tolulene diisocyanate with hydroquinone in dioxane or N,N-dimethyl-acetandde. The reaction process was monitored by FTIR, and the product was investigated bylH NMR and elemental analysis (EA). A liquid crystalline poly(urethane-ester) was obtainedusing the BHPTU monomer. |
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| Keywords: | liquid crystalline polymer poly(urethane-ester) synthesis |
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