短切碳纤维增强尼龙66的流变性能  

Rheological properties of chopped carbon fiber reinforced nylon 66

作　　者：黄珍媛[1] 黎冰华 程斌 陈邑 HUANG Zhen-yuan;LI Bing-hua;CHENG Bin;Chen Yi(School of Mechanical and Automotive Engineering,South China University of Technology,Guangzhou 510640,China)

机构地区：[1]华南理工大学机械与汽车工程学院,广州510640

出　　处：《复合材料科学与工程》2022年第9期83-89,共7页Composites Science and Engineering

基　　金：东莞市科技计划项目(20185071551596)。

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。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 10 wt%,the apparent viscosity of the melt is the smallest,and when SCF is 20 wt%and 40 wt%,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 20 wt%,the loss factor of the composite system is less than 1,and the elastic response of the material is always dominant.

关 键 词：短切碳纤维增强尼龙66 流变性能 纤维含量 黏度 

分 类 号：TB332[一般工业技术—材料科学与工程]