Three polycaprolactam samples modified by 0.05—0.50% polybenzimidazole （PBI） by weight were prepared. Their structure and mechanical properties were characterized by means of FT-IR, SEM, DTA, density tensile, impac...Three polycaprolactam samples modified by 0.05—0.50% polybenzimidazole （PBI） by weight were prepared. Their structure and mechanical properties were characterized by means of FT-IR, SEM, DTA, density tensile, impact and viscoelastic method. PBI delayed the superimposed polymerization-crystallization process of the activated anionic polymerization of caprolactam. The monomer casting （MC） nylons modified by PBI had lower crystallinities, lower T;and more nearly perfect spherulites than MC nylon itself, and showed a typical toughening effect.展开更多
基金Project supported by the National Natural Science Foundation of China,
文摘Three polycaprolactam samples modified by 0.05—0.50% polybenzimidazole （PBI） by weight were prepared. Their structure and mechanical properties were characterized by means of FT-IR, SEM, DTA, density tensile, impact and viscoelastic method. PBI delayed the superimposed polymerization-crystallization process of the activated anionic polymerization of caprolactam. The monomer casting （MC） nylons modified by PBI had lower crystallinities, lower T;and more nearly perfect spherulites than MC nylon itself, and showed a typical toughening effect.
