原位聚合制备碳纤维增强MC尼龙6复合材料及其性能表征

Preparation and Properties of Carbon Fiber Reinforced MC Nylon 6 Composites by In-situ Polymerization

摘要: 通过己内酰胺的原位阴离子聚合和真空灌注成型(VARI)工艺制备了碳纤维(CF)/浇铸(MC)尼龙6热塑性复合材料。采用微控电子万能试验机、傅立叶红外光谱(FTIR)、差示扫描量热仪(DSC)、金相显微镜、扫描电镜(SEM)等对复合材料的力学性能、结构、热性能和形貌进行了评价。测试结果表明,聚合成型温度为160℃时所制备的CF/MC尼龙6复合材料的拉伸强度达到197 MPa,弯曲强度达到295 MPa;复合材料中MC尼龙6组分的热性能与商业尼龙6相近,碳纤维在MC尼龙6基体中分布均匀,碳纤维与MC尼龙6的界面粘接良好。

Abstract: Carbon fiber (CF)/monomer casting (MC) nylon 6 composites were prepared by in situ anionic polymerization and vacuum assisted resin infusion molding (VARI) process. The structure, thermal properties, mechanical properties and morphologies of the composites were characterized by FTIR, DSC, universal testing machine, SEM and metallographic microscope and the effects of mold temperatures on the properties of the composites were discussed.Results showed the tensile strength of CF/MC nylon 6 composites prepared at 160℃ reached 197 MPa and the flexural strength reached 295 MPa; that the thermal properties of MC nylon 6 components in the composites were similar to those of commercial nylon 6; that the CF was uniformly distributed in the matrix and fully impregnated by MC nylon 6.