典型文献
Preparation of High-performance Polyimide Fibers with Wholly Rigid Structures Containing Benzobisoxazole Moieties
文献摘要：
In this work,a fully rigid coplanar symmetric heterocyclic unit was introduced into the rigid polyimide macromolecular backbone structure to prepare high-performance polyimide fibers.The novel co-polyimide (co-Pl) fibers based on 3,3',4,4'-biphenyltetracarboxylic anhydride (BPDA),p-phenylenediamine (PDA) and 2,6-(4,4'-diaminodiphenyl) benzo[1,2-d:5,4-d']bisoxazole (PBOA) were fabricated via a two-step wet-spinning method.The effects of benzobisoxazole moiety on spinnability,aggregation structure,and mechanical properties of fibers were systematically discussed.The detailed structural analysis revealed that the well-defined aggregation structures of co-PI fibers were obtained from initial amorphous structure when post hot-drawing temperature was higher than 460 ℃ under proper drawing ratio,and the incorporation PBOA into BPDA-PDA structures produced more compact structural co-Pl fiber than homo BPDA-PDA fiber.The BPDA-PDA/PBOA co-Pl fibers exhibited optimum tensile strength and modulus of 2.65 and 103 GPa,which increased by 182％ and 84％ compared to the homo BPDA-PDA fiber,respectively.
文献关键词：
中图分类号：
作者姓名：
Yu-Ting Fang;Feng Gan;Jie Dong;Xin Zhao;Xiu-Ting Li;Qing-Hua Zhang
作者机构：
State Key Laboratory for Modification of Chemical Fibers and Polymer Materials,College of Materials Science and Engineering,Donghua University,Shanghai 201620,China;School of Textile Materials and Engineering,Wuyi University,Jiangmen 529020,China
文献出处：
引用格式：
[1]Yu-Ting Fang;Feng Gan;Jie Dong;Xin Zhao;Xiu-Ting Li;Qing-Hua Zhang-.Preparation of High-performance Polyimide Fibers with Wholly Rigid Structures Containing Benzobisoxazole Moieties)[J].高分子科学（英文版）,2022(03):280-289
A类：
Wholly,Benzobisoxazole,Moieties,biphenyltetracarboxylic,diaminodiphenyl,bisoxazole,PBOA,benzobisoxazole
B类：
Preparation,High,performance,Polyimide,Fibers,Rigid,Structures,Containing,In,this,work,fully,rigid,coplanar,symmetric,heterocyclic,unit,was,introduced,into,polyimide,macromolecular,backbone,prepare,fibers,novel,Pl,anhydride,BPDA,phenylenediamine,were,fabricated,via,two,step,wet,spinning,method,effects,moiety,spinnability,aggregation,mechanical,properties,systematically,discussed,detailed,structural,analysis,revealed,that,well,defined,structures,obtained,from,initial,amorphous,when,post,hot,drawing,temperature,higher,than,under,incorporation,produced,more,compact,homo,exhibited,optimum,tensile,strength,modulus,GPa,which,increased,by,compared,respectively
AB值：
0.520321
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机标中图分类号，由域田数据科技根据网络公开资料自动分析生成，仅供学习研究参考。
