Dry-spun Polyimide Fibers with Excellent Thermal Stability, Intrinsic Flame Retardancy and Ultralow Smoke Release

Han Dong; Yu-Ping Wang; Xiu-Ting Li; Xin Zhao; Jie Dong; Qing-Hua Zhang

doi:10.1007/s10118-022-2792-3

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Dry-spun Polyimide Fibers with Excellent Thermal Stability, Intrinsic Flame Retardancy and Ultralow Smoke Release

RESEARCH ARTICLE | Updated：2022-10-25

- Dry-spun Polyimide Fibers with Excellent Thermal Stability, Intrinsic Flame Retardancy and Ultralow Smoke Release
- Chinese Journal of Polymer Science Vol. 40, Issue 11, Pages: 1422-1431(2022)
- Affiliations：
  
  a.State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China
  b.Jiangsu New Vision Advanced Functional Fiber Innovation Center Co., Ltd., Suzhou 215000, China
- Author bio：
  
  dj01@dhu.edu.cn (J.D.)
  qhzhang@dhu.edu.cn (Q.H.Z.)
- Funds：
- DOI：10.1007/s10118-022-2792-3
  CLC：
- Received：06 March 2022，
  
  Revised：2022-4-25，
  
  Accepted：30 May 2022，
  
  Online First：17 August 2022，
  
  Published：01 November 2022
- Accepted：
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Dong, H.; Wang, Y. P.; Li, X. T.; Zhao, X.; Dong, J.; Zhang, Q. H. Dry-spun polyimide fibers with excellent thermal stability, intrinsic flame retardancy and ultralow smoke release. Chinese J. Polym. Sci. 2022, 40, 1422–1431

Han Dong, Yu-Ping Wang, Xiu-Ting Li, et al. Dry-spun Polyimide Fibers with Excellent Thermal Stability, Intrinsic Flame Retardancy and Ultralow Smoke Release[J]. Chinese Journal of Polymer Science, 2022, 40(11): 1422-1431.
Dong, H.; Wang, Y. P.; Li, X. T.; Zhao, X.; Dong, J.; Zhang, Q. H. Dry-spun polyimide fibers with excellent thermal stability, intrinsic flame retardancy and ultralow smoke release. Chinese J. Polym. Sci. 2022, 40, 1422–1431 DOI： 10.1007/s10118-022-2792-3.

Han Dong, Yu-Ping Wang, Xiu-Ting Li, et al. Dry-spun Polyimide Fibers with Excellent Thermal Stability, Intrinsic Flame Retardancy and Ultralow Smoke Release[J]. Chinese Journal of Polymer Science, 2022, 40(11): 1422-1431. DOI： 10.1007/s10118-022-2792-3.

摘要

Polyimide fibers with an ultrahigh thermal stability

superior flame retardancy and low smoke release were prepared by dry spinning

thermal cyclization and hot-drawing and were used on a large scale in high temperature filtration

aerospace and thermal protection fields.

Abstract

Polymer fiber with an ultrahigh thermal stability

superior flame retardancy and low smoke release during combustion is urgently needed and a crucial challenge for developing advanced fireproof textiles. In this study

a series of high-performance polyimide fibers are synthesized by copolymerizing 4

4'-diaminodiphenylmethane (MDA) into the pyromellitic dianhydride-

-phenylenediamine (PMDA-PDA) backbone for synergistically solving the technical challenge of poor fiber processing ability of these polyimides with a high inherent molecular rigidity. The glass transition temperature (

) of resultant fibers with the PDA molar ratio over 50 mol% reaches above 420 °C and their 10 wt% weight loss temperature (

10%

) is within 543−633 °C. For the typical fiber containing 80 mol% of PDA

the limiting oxygen index (LOI) reaches 39% and exhibits a rapid self-extinguishing performance after deviating from the flame. Meanwhile

this fiber exhibits the minimum heat release rate of 14.1 kW/m

in a long ignition time of 813 s during combustion

revealing its better flame retardancy than the well-known Nomex fiber with a heat release rate of 140.6 kW/m

during the 120 s ignition. Meanwhile

the total smoke production of this polyimide fiber is only 1/9 of the Nomex fiber. Accordingly

the excellent flame retardancy of polyimide fibers indicating them more attractive as the fireproof materials in the field of emergency protection.

关键词

Keywords

references

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