【摘要】 本文主要研究聚喹恶啉(PPQ)作为一种高分子添加剂,在铸型尼龙-6的聚合过程中加入,得到具有较好性能的尼龙-6。并研究了PPQ不同含量对尼龙6的结晶行为、形态和力学性能的影响。从DSC的结果和SEM扫描电镜的观察,PPQ似乎起着成核剂的作用,使尼龙-6的结晶度提高,球晶的晶粒大小随PPQ的用量增加而变小。从力学性能的测试结果表明PPQ的添加量仅为尼龙-6重量的0.5％以下,即可使尼龙-6的拉伸模量、强度、表面硬度和耐磨性能都普遍提高。其中,以耐磨性能的变化更为显著。磨耗量下降20多倍。更多还原

【Abstract】 Effect of ;macromolecular additives of polyphenlquinoxalines (PPQ) on the crystallization morphology and mechanical properties has been investigated by DSC, SEM and mechanical testing. The DSC results showed that the PPQ molecule seems to be a nucleating agent for the crystallization of monomer castion nylon-6. However the morphology revealed that the PPQ molecule has the strong effect on the dimension of nylon-6 spher-uiites. The mechanical properties also showed the strong effect of PPQ additives, for example, only 0.5% (by weight) PPQ in nylon-6 the modulus, hardness and the wear-resisting of nylon-6 can be risen by 2 to 20 folds.更多还原