短切碳纤维增强尼龙66的流变性能

doi:10.19936/j.cnki.2096-8000.20220928.012

复合材料科学与工程 ›› 2022, Vol. 0 ›› Issue (9): 83-89.DOI: 10.19936/j.cnki.2096-8000.20220928.012

短切碳纤维增强尼龙66的流变性能

黄珍媛, 黎冰华^*, 程斌, 陈邑

华南理工大学机械与汽车工程学院,广州 510640

收稿日期:2021-09-17 出版日期:2022-09-28 发布日期:2022-09-27
通讯作者: 黎冰华(1998-),男,硕士研究生,主要从事新材料成型与模拟分析技术方面的研究,1724510988@qq.com。
作者简介:黄珍媛(1975-),女,博士,副教授,主要从事新材料成型与模拟分析技术方面的研究。
基金资助:
东莞市科技计划项目(20185071551596)

Rheological properties of chopped carbon fiber reinforced nylon 66

HUANG Zhen-yuan, LI Bing-hua^*, CHENG Bin, Chen Yi

School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640, China

Received:2021-09-17 Online:2022-09-28 Published:2022-09-27

摘要/Abstract

摘要： 聚合物流变性能是影响复合材料性能的重要因素,本文对SCF/PA66共混体系流变性能进行了研究。通过熔融共混法制备不同纤维含量的短切碳纤维增强尼龙66(SCF/PA66)复合材料,采用毛细管流变仪、扫描电镜和旋转流变仪研究了纤维含量和频率等对SCF/PA66共混体系流变性能的影响。结果表明:SCF/PA66为非牛顿流体,加入SCF后非牛顿系数减小,稠度系数变大;当SCF为10wt%时,熔体表观黏度最小,当SCF为20wt%和40wt%时,熔体表观黏度最大;加入较多SCF后,共混体系的储能模量和损耗模量会大幅提高,当SCF为20wt%时,复合体系损耗因子小于1,材料的弹性响应始终占优。

关键词: 短切碳纤维增强尼龙66, 流变性能, 纤维含量, 黏度

Abstract: The rheological properties of polymers are an important factor affecting the properties of composite materials, this paper studies the rheological properties of the SCF/PA66 blend system. Chopped carbon fiber reinforced nylon 66 (SCF/PA66) composites with different fiber contents were prepared by melt blending, and the effects of fiber content and frequency on the rheological properties of the SCF/PA66 blend system were studied by capillary rheometer, scanning electron microscope and rotary rheometer. The results show that SCF/PA66 is a non-Newtonian fluid. After addition of SCF, the non-Newtonian coefficient decreases and the consistency coefficient increase. When SCF is 10wt%, the apparent viscosity of the melt is the smallest, and when SCF is 20wt% and 40wt%, the apparent viscosity of the melt is the largest. After adding more SCF, the storage modulus and loss modulus of the blend system are greatly improved. When the SCF is 20wt%, the loss factor of the composite system is less than 1, and the elastic response of the material is always dominant.

Key words: chopped carbon fiber reinforced nylon 66, rheological properties, fiber content, viscosity

中图分类号:

TB332

黄珍媛, 黎冰华, 程斌, 陈邑. 短切碳纤维增强尼龙66的流变性能[J]. 复合材料科学与工程, 2022, 0(9): 83-89.

HUANG Zhen-yuan, LI Bing-hua, CHENG Bin, Chen Yi. Rheological properties of chopped carbon fiber reinforced nylon 66[J]. COMPOSITES SCIENCE AND ENGINEERING, 2022, 0(9): 83-89.

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短切碳纤维增强尼龙66的流变性能

Rheological properties of chopped carbon fiber reinforced nylon 66

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