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A Novel Diamine,4'-Phenyiphenyi 4-(3",5"-Diaminobenzoyioxy)-benzoate and Longer Side-chain Polyimide

Chinese Chemical Letters 2005年第9期16卷 1151-1154页

作者： Jin YANG Li Gang REN Xiang Yang LIU Yi GU State Key Laboratory of Polymeric materials Engineering College of Polymer Science and Engineering Sichuan University Chengdu 610065

This is a part of our systematic research work on polyimides with mesogenic unit side chain. In this study, a new 4＇-phenylpbenyl 4-（3＂,5＂-diaminobenzoyloxy）benzoate and polyimide were synthesized, and characterized by FTIR, ^1H-NMR, inherent viscosity, mechanical properties, and solubility measurements. The diamine composed with mesogenic unit aryl ester groups and bipbenyl group with longer L/D ratio, was synthesized by two key steps. Firstly, the hydroxy group of 4-hydroxybenzoic acid was protected by acetoxy group for avoiding self- polymerization of 4-hydroxybenzoic acid, and then selectively hydrolyzed after esterification of carboxyl. Secondly, a selective catalysis hydrogenation was adopted to prevent the aryl ester from deoxidation. Based on this diamine, a novel polyimide was prepared by polycondensation of 4＇-phenylphenyl 4-（3＂, 5＂-diaminobenzoyloxy）benzoate and 4-aminophenyl ether（ODA） with 4, 4＇-oxydiphthalic anhydride（ODPA） in N-methyl-2-pyrrolidone （NMP）. The resulting polyimide with longer side chain showed better solubility and more regular structure. Its inherent viscosity is lower than that without side chains, but its modulus and strength not only maintained, even improved.

关键词： Polyimide film materials side-chain synthesis

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Fabrication and characterization of tunable wettability surface on copper substrate by poly(ionic liquid) modification via surface initiated nitroxide-mediated radical polymerization

Fabrication and characterization of tunable wettability surf...

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甘肃省化学会第二十七届年会暨第九届甘肃省中学化学教学经验交流会

作者： Fei Wan,Wu Yang~*,Hao Guo,Xiaoyan He,Jie Ren,Jinzhang Gao (Key Laboratory of Eco-environment Related Polymer materials of MOE,College of Chemistry and Chemical Engineering,Northwest Normal University,Lanzhou 730070)

Metals,such as copper,as very important engineering materials,have had many practical and potential applications,for example,in architecture,auto,aviation,and power transmission fields. But effective protection and anticorrosion of the material surfaces have been puzzling material *** we know,surface properties of metals influence their *** to search for a precise control technique of the surface properties is still challenging.

关键词： Surface initiated nitroxide mediated radical polymerization poly(ionic liquid) reversible wettability copper film materials

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