【摘要】 用差示扫描量热仪(DSC)研究了KF表面阴离子接枝尼龙6对PA 6/KF复合材料等温结晶行为的影响。结果表明,PA 6的等温结晶过程主要为成核作用控制;未接枝的KF对PA 6结晶起异相成核作用,提高了PA 6的结晶速率;表面阴离子接枝尼龙6的KF对PA 6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PA 6分子链的迁移运动,导致表面阴离子接枝PA 6的PA 6/KF复合材料中PA 6组分的结晶速率虽比纯PA 6大,但比未接枝PA 6的PA 6/KF复合材料小,且结晶度也有所下降。更多还原

【Abstract】 Differential scanning calorimetry was used to investigate the effect of polymide6(PA6) grafted Kevlar fiber(KF) on the isothermal crystallization kineties of PA6/KF composites.The results show that the isothremal crystollization of PA6 is dominated by nucleation while the un-grafted KF plays an role of heteregeneous nucleation agent in the process of crystallization of PA6 and increases its crystallization rate.The PA6 grafted KF still plays the role of heteregeneous nucleation agent in the PA6/KF composites,however,its effect is less than that of the ungrafted KF.This may be ascribed to the improved interfacial adhesion between PA6 and KF 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.更多还原