A Novel Aromatic Polyimide Fiber with Biphenyl Side-groups: Dope Synthesis and Filament Internal Morphology Control，2005年新型纤维与聚合物材料国际学术会议（10.19-10.21，上海）-中国聚合物网,论文下载

A Novel Aromatic Polyimide Fiber with Biphenyl Side-groups: Dope Synthesis and Filament Internal Morphology Control

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关键词：

polyimide fibers silylated diamine dry-jet wet spinning
morphology gel spinning.

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323K

所属学科：

分子表征

来源：

2005年新型纤维与聚合物材料国际学术会议（10.19-10.21，上海）

简介：

Aneworganic-solublearomaticpolyimidewithbiphenylside-groupshasbeensynthesizedfrom4,4ˊ-oxydiphthalicanhydride(ODPA)and3,5-diamino-benzonic-4ˊ-biphenylester(DABBE)viaaone-steppolymerizationinm-cresol.Ahighermolecularweightpolyimidehasbeenobtainedbytheadditionofchlorotrmethylsilane(TMSCl)insolutiontoform,insitu,silylateddiaminebypolycondensation.TheoptimumamountsofTMSClrelativetothenumberofaminofunctionalgroupsare100%.Thispolyimideissolubleinm-cresol,allowingfiberstobespunfromisotropicsolutionusingadry-jetwetspinningmethod.Whencoagulationbathofspinningwastheethanol/water,mostofas-spunfibersmorphologiesareporous-like.Basedonaternaryphasediagramofm-cresol,ehanolandwater,thesolidandirregularcross-sectionalas-spunfiberscanalsobeobtainedbyvaryingtherateofpolymercoagulationthroughadjustmentinnonsolvent/solventmiscibilityofthecoagulationbath.Inaddition,thegelspinningprocesswasalsointroducedintothispolyimidesystem,whichspinningresultsshowedthatitwasmoreeasytodrawduringthegelspinningstageandobtainthesolidcircularcross-sectionalas-spunfibersthanthatoftheaboveprocess.Andthemechanicalprosperitiesofthesetwokindsofannealedfibersarealsoreported.

作者：

Xiangyang Liu Wei Xu Guangdou Ye Yi Gu

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2007-08-08 17:18:39

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