碳纤维表面阴离子接枝尼龙6对尼龙6等温结晶动力学的影响  

Effect of Carbon Fiber Grafted Polyamide6 by Anionic Grafting on the Kinetics of Isothermal Crystallization of Carbon Fiber/Polyamide6 Composites

作　　者：林志勇[1] 林金清[2] 叶葳[2] 曾汉民[1] 

机构地区：[1]中山大学聚合物复合材料和功能材料教育部重点实验室∥化学与化学工程学院,广东广州510275 [2]华侨大学材料科学与工程学院,福建泉州362011

出　　处：《中山大学学报（自然科学版）》2002年第5期50-53,共4页Acta Scientiarum Naturalium Universitatis Sunyatseni

基　　金：国家自然科学基金资助项目 (5 96 0 2 0 0 7) ;福建省自然科学基金资助项目 (E9910 0 2 3;E0 110 0 2 3) ;聚合物复合材料及功能材料教育部重点实验室访问学者基金资助项目 (1999- 2 - 0 1)

摘　　要：利用差示扫描量热仪 (DSC)研究了碳纤维 (CF)表面阴离子接枝尼龙 6 (PA6 )对CF/PA6复合材料中PA6的等温结晶动力学的影响。结果表明 :PA6的等温结晶过程主要为成核作用控制 ;未接枝的CF对PA6结晶起异相成核作用 ,提高了PA6的结晶速率 ;表面阴离子接枝尼龙 6的CF对PA6结晶仍起异相成核作用 ,但由于复合材料的界面相互作用提高 ,同时又会阻碍PA6分子链的迁移运动 ,导致表面阴离子接枝PA6的CF/PA6复合材料中PA6组分的结晶速率虽比纯PA6大 ,但比未接枝PA6的CF/尼龙 6复合材料小 ,且结晶度也有所下降。Differential scanning calorimetry was used to investigate the effect of polymide6(PA6) grafted carbon fiber(CF) on the isothermal crystallization kineties of CF/PA6 composites.The results showed that the isothremal crystollization of PA6 was dominated by nucleation while the un_grafted CF played an role of heteregeneous nucleation agent in the process of crystallization of PA6 and increased its crystallization rate.The PA6 grafted CF still played the role of heterogeneous nucleation agent in the CF/PA6 composites,however,its effect was less than that of the ungrafted CF.This may be ascribed to the improved interfacial adhesion between PA6 and CF in the composites where the movement of PA6 segments are inhibitted,thus leading to the reduction of the crystallization rate and the degree of crystallinity of PA6 in the composites.

关 键 词：碳纤维 表面阴离子接枝尼龙6 CF/尼龙6复合材料 等温结果动力学 纤维增强 结晶度 结晶速率 

分 类 号：TB332[一般工业技术—材料科学与工程]