Issue 85, 2015

Effect of pre-imidization on the structures and properties of polyimide fibers

Abstract

A series of polyimide (PI) fibers derived from 3,3′,4,4′-biphenyltetracarboxylic dianhydride (BPDA), 4,4′-oxydiphthalic anhydride (ODPA) and p-phenylenediamine (p-PDA) were successfully prepared through a partially pre-imidization process, and the effects of different amount of dehydration reagents and initial poly(amic acid) (PAA) concentrations on the structure–property relationship of the resultant PI fibers were systematically investigated. The results showed that both the increased amount of dehydration reagents and PAA concentration could result in the ordered molecular packing arrangement of the polymer chains and gradually formed homogeneous structures in the fibers, which are proposed to be essentially dominated for the effectively enhancement in the mechanical properties of PI fibers. Moreover, the PI fibers obtained through the pre-imidization process still exhibited excellent thermal-oxidative stabilities, although the 5% weight loss temperature of the PI fibers was slightly decreased compared with that of the pure PI fibers as a result of the residual dehydration reagents in the fibers. Consequently, the present work provided a new approach in preparing high-performance PI fibers through a partially pre-imidization process.

Graphical abstract: Effect of pre-imidization on the structures and properties of polyimide fibers

Article information

Article type
Paper
Submitted
09 Jun 2015
Accepted
07 Aug 2015
First published
10 Aug 2015

RSC Adv., 2015,5, 69555-69566

Author version available

Effect of pre-imidization on the structures and properties of polyimide fibers

J. Chang, Q. Ge, M. Zhang, W. Liu, L. Cao, H. Niu, G. Sui and D. Wu, RSC Adv., 2015, 5, 69555 DOI: 10.1039/C5RA10943D

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