中国塑料 ›› 2024, Vol. 38 ›› Issue (3): 13-17.DOI: 10.19491/j.issn.1001-9278.2024.03.003

• 材料与性能 • 上一篇    下一篇

对位芳纶短切纤维对聚苯腈树脂力学性能的影响

周子玉(), 桑晓明, 耿旭, 肖晓红, 黄晓祥, 陈兴刚()   

  1. 华北理工大学材料科学与工程学院高分子材料系,河北 唐山 063210
  • 收稿日期:2023-08-29 出版日期:2024-03-26 发布日期:2024-03-28
  • 通讯作者: 陈兴刚(1985-),男,副教授,主要从事耐高温树脂及其复合材料的开发及应用研究,chenxg@heuu.edu.cn
    E-mail:3379568392@qq.com;chenxg@heuu.edu.cn
  • 作者简介:周子玉(2001-),女,本科,主要从事生物质聚苯腈树脂的制备及降解性能的研究,3379568392@qq.com
    第一联系人:地址:北京市海淀区阜成路11号《中国塑料》杂志社广告部
    邮编:100048

Effect of short⁃cut p⁃aramid fibers on mechanical properties of polyacrylonitrile resin

ZHOU Ziyu(), SANG Xiaoming, DI Xu, XIAO Xiaohong, HUANG Xiaoxiang, CHEN Xinggang()   

  1. College of Materials Science and Engineering,North China University of Science and Technology,Tangshan 063210,China
  • Received:2023-08-29 Online:2024-03-26 Published:2024-03-28
  • Contact: CHEN Xinggang E-mail:3379568392@qq.com;chenxg@heuu.edu.cn

摘要:

利用氯磺酸磺化对位短切芳纶纤维表面来引入—SO2Cl基团,40 mmol/L的氯磺酸磺化改性效果最佳。利用苯基三乙氧基硅烷偶联剂对对位短切芳纶纤维进行二次改性,成功在纤维表面接枝偶联剂。将改性对位短切芳纶纤维与苯腈单体采取原位聚合方法制备聚苯腈/对位短切芳纶纤维复合材料,研究不同纤维含量对复合材料力学性能的影响。结果表明,其中纤维含量为0.5 %(质量分数,下同)时,复合材料力学性能最佳,储能模量达4 137 MPa,玻璃化转变温度达350 ℃,弯曲模量达4 467 MPa。

关键词: 短切对位芳纶纤维, 磺化改性, 聚苯腈树脂, 力学性能

Abstract:

The surface of short⁃cut p⁃aramid fibers was modified with chlorosulfonic acid to introduce —SO2Cl groups. An optimal modification effect was achieved at a chlorosulfonic acid concentration of 40 mmol/L. The fibers were modified by using phenyltriethoxysilane as a coupling agent, and the coupling agent was successfully grafted onto the fiber surface. The polyacrylonitrile/p⁃aramid fiber composites were prepared through in⁃situ polymerization of modified p⁃aramid fiber with benzonitrile monomer. The effect of fiber content on the mechanical properties of the composites was investigated. The composite obtained optimal mechanical properties at a fiber content of 0.5 wt%, and its storage modulus, glass transition temperature, and bending modulus reached 4,137 MPa, 350 ℃, and 4,467 MPa, respectively.

Key words: chopped para?aramid fiber, sulfonated modification, phthalonitrile resin, mechanical property

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