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《Chemical Research and Application》 2008-09
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Synthesis of p-PEPB liquid crystalline epoxy and modification study on bisphenol-A epoxy resin

ZHANG Xiao na,GAO Jun gang,LIU Xiao dan,ZHAO Hong chi (College of Chemistry & Environment Science,Hebei University,Baoding 071002 China)  
In this article,a novel liquid crystalline p-phenylene di[4-(2,3-epoxypropyl) benzoate](p-PEPB) was synthesized from P-phenylene di-4-(allyloxy) benzoate(p-PDAB),using M-choroperoxybenzoic acid(MCPBA) as oxidant.Its structure and liquid crystalline behavior were characterized by DSC,1H NMR,FTIR,POM and WXD.The results of XRD and POM are shown that this compound is nematic liquid crystal texture.The temperature range of liquid crystalline is 180-250oC.The mixture of p-PEPB with bisphenol-A epoxy resin(BPAER) was cured with a cured agent of 4,4-diamino-diphenyl ether(DDE) and the technology themperatures,Ti,Tp and Tf of curing process was obtained.The Tgs were determined by torsional braid analysis(TBA).The relationship of Ea with the conversion α was found by the isoconversional method of Ozawa.
【Fund】: 河北省自然科学基金资助项目(B2005000108)
【CateGory Index】: TQ323.5
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