Synthesis and Properties of Novel Polyimide Fibers Containing Phosphorus Groups in the Side Chain (DATPPO)

Zhao Yong; Li Guo-min; Liu Fang-fang; Dai Xue-min; Dong Zhi-xin; Qiu Xue-peng

doi:10.1007/s10118-017-1896-7

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Synthesis and Properties of Novel Polyimide Fibers Containing Phosphorus Groups in the Side Chain (DATPPO)

Papers | Updated：2024-11-27

- Synthesis and Properties of Novel Polyimide Fibers Containing Phosphorus Groups in the Side Chain (DATPPO)
- Chinese Journal of Polymer Science Vol. 35, Issue 3, Pages: 372-385(2017)
- Affiliations：
  
  a. Polymer Composites Engineering Laboratory, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
  b. University of Chinese Academy of Sciences, Beijing 100049, China
- Author bio：
  
  Zhi-xin Dong(董志鑫), E-mail:zxdong@ciac.ac.cn
  Xue-peng Qiu(邱雪鹏), E-mail:xp_q@ciac.ac.cn
- Funds：
- DOI：10.1007/s10118-017-1896-7
  CLC：
- Received：15 July 2016，
  
  Revised：2016-8-23，
  
  Accepted：11 September 2016，
  
  Published：25 March 2017
- Accepted：
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Zhao Yong, Li Guo-min, Liu Fang-fang, et al. Synthesis and Properties of Novel Polyimide Fibers Containing Phosphorus Groups in the Side Chain (DATPPO)[J]. Chinese Journal of Polymer Science, 2017, 35(3): 372-385.
DOI：

Zhao Yong, Li Guo-min, Liu Fang-fang, et al. Synthesis and Properties of Novel Polyimide Fibers Containing Phosphorus Groups in the Side Chain (DATPPO)[J]. Chinese Journal of Polymer Science, 2017, 35(3): 372-385. DOI： 10.1007/s10118-017-1896-7.

摘要

Abstract

A series of polyamic acid copolymers (co-PAAs) containing phosphorous groups in the side chains were synthesized from[2

5-bis(4-aminophenoxy) phenyl] diphenylphosphine oxide (DATPPO) and 4

4'-oxydianiline (ODA) with 3

4'-biphenyltetracarboxylic dianhydride (

-BPDA) through the polycondensation in

'-dimethyacetamide (DMAc). The co-PAA solutions were spun into fibers by a dry-jet wet spinning process followed by thermal imidization to obtain co-polyimide (co-PI) fibers. FTIR spectra and elemental analysis confirmed the chemical structure of PI fibers. SEM results indicated that the resulting PI fibers had a smooth and dense surface

a uniform and circle-shape diameter. The thermogravimetric measurements showed that with the increase of DATPPO content

the resulting PI fibers possessed high decomposition temperature and residual char yield

indicating that the PI fibers had good thermal stability. The corresponding limiting oxygen index (LOI) values from the experiment results showed that the co-PI fibers possessed good flame-retardant property. Furthermore

the mechanical properties of the co-PI fibers were investigated systematically. When the DATPPO content increased

the tensile strength and initial modulus of the co-PI fibers decreased. However

the mechanical properties were improved by increasing the draw ratio of the fibers. When the draw ratio was up to 2.5

the tensile strength and initial modulus of the co-PI fibers reached up to 0.64 and 10.02 GPa

respectively. The WAXD results showed that the order degree of amorphous matter increased with increased stretching. In addition

the SAXS results displayed that valuably drawing the fibers could eliminate the voids inside and lead to better mechanical property. WAXD revealed that the orientation of the amorphous polymer influenced the mechanical properties of the fibers.

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Keywords

references

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