连续碳纤维增强聚酰胺6复合材料的研究  

Study on Continuous Carbon Fiber Reinforced Polyamide 6 Composites

作　　者：许丽丹[1] 项爱民[1] 郑义珠[1] 周洪福[1] 

机构地区：[1]北京工商大学材料科学与工程系,北京100037

出　　处：《中国塑料》2007年第1期39-42,共4页China Plastics

基　　金：北京市教育委员会科技发展计划面上项目（KM200610011001）

摘　　要：以拉挤熔融浸渍制备连续碳纤维增强聚酰胺6（CFRPA6）复合材料，通过改变碳纤维（CF）的长度和含量考察材料的各项性能。结果表明，复合材料中CF长度由2～4mm（短CF）增加到8～10mm（长CF），拉伸强度、弯曲强度和硬度最大增幅分别为25．7％、31．7％和3．1％；当CF含量为15％时，长CF增强PA6复合材料的冲击强度比短CF增强PA6提高了16．3％；与短CF增强PA6相比，在长CF含量为3％时，长CF增强PA6的吸水率降幅最大，为15．7％；但CF的长度对CFRPA6复合材料的线膨胀系数影响不大。随着CF的含量增加，除冲击强度外，其他性能均有改善。在CF含量为15％时，短CF增强PA6和长CF增强PA6的拉仲强度比纯PA6分别提高了101．7％和141．9％；弯曲强度比纯PA6分别提高了152．6％和196．2％；硬度比纯PA6分别提高了8．7％和12．1％。冲击强度比纯PA6分别下降了47．7％和39．2％。15％短CF和15％长CF增强PA6的吸水率均为1．3％，比纯PA6下降了31．8％。当CF含量为3％时降幅最大，短CF和长CF增强PA6的线膨胀系数分别下降了89．5％和84．2％。Continuous carbon fiber reinforced polyamide 6（CFRPA6） composites were prepared through pultrusion melt immersion method. The properties of composites were investigated with the changes of carbon fiber＇s content and length. The result showed when the length of carbon fiber was increased from 2--4 mm （short CF） to 8--10 mm（long CF）, the tensile strength, flexural strength and hardness were enhanced by 25.70 %,31.65 %,3.10 %,respectively. When CF content was 15 %, the impact strength of long CF reinforced PA6 was 16.25 % higher than that of short CF reinforced PA6. When CF content was 3 %, the water absorption of long CF reinforced PA6 was 15.66 % lower, compared to short CF reinforced PA6,while the linear expansibility was hardly affected by the length of CF. With increasing of carbon fiber content, impact strength was decreased, while tensile strength, flexural strength, hardness, water absorption and linear expansibility were still improved steadily.

关 键 词：碳纤维 聚酰胺6 增强 复合材料 力学性能 

分 类 号：TQ323.6[化学工程—合成树脂塑料工业]