中文摘要：

采用1，3-双（2-嗯唑啉）基苯（MPBO）与聚酰胺6（PA6）进行熔融扩链反应，考察了MPBO用量对PA6力学性能、流变性能和结晶性能的影响。在240℃条件下，当MPBO用量在2．0％时，MPBO对PA6的扩链效果最佳，PA6的数均相对分子质量从1．4×10^4提高到了2．5×10^4，其拉伸强度、断裂伸长率和特性黏度均有一定程度的提高，熔体流动速率明显降低；MPB0对PA6有显著的扩链效果，但是同时也导致PA6的结晶度和结晶温度有所下降。

英文摘要：

Chain-extension of polyamide6 （PA6） was carried out by reacting with 2,2＇-（1,3-phenyl- ene）bis（2-oxazoline） （MPBO） in melt. The optical chain-extension was found when the loading of MPBO was 2.0 % at 240℃. After chain-extension, the number-average molecular weight of PA6 increased from 1.4×10^4 to 2.5×10^4, the tensile strength, elongation at break, and intrinsic viscosity increased, the melt flow index dropped. However, crystallinity and crystallization temperature were decreased.