UHMWPE纤维的表面交联改性

Surface Crosslinking Modification of UHMWPE Fibers

选用三聚氰酸三丙烯酯(TAC)作为交联剂对超高分子量聚乙烯(UHMWPE)纤维进行紫外辐照交联改性,探讨了正庚烷浸泡时间、交联剂浓度、紫外线辐照时间等因素对UHMWPE纤维表面交联效果及纤维蠕变性能的影响。采用红外光谱、扫描电子显微镜及力学性能测试等多种手段对交联改性前后UHMWPE纤维的结构进行表征。结果表明,UHMWPE在正庚烷中的最佳浸泡时间为24h;紫外线辐照最佳时间为1.5 h;经交联改性后UHMWPE纤维的抗蠕变性能有较明显提高。

[2,4,6-tris（2-propenyloxy）-1,3,5-triazine]（TAC） was chosen as crosslinking agent for the ultra-high molecular weight polyethylene（UHMWPE） fiber surface crosslinking modification initiated by ultraviolet radiation.Influence of n-heptane soaking time,concentration of the crosslinking agent and ultraviolet radiation time on the effectiveness of the surface cross-linking as well as the improvement of the creep properties of UHMWPE were discussed.IR,SEM and creeping test were conducted to characterize the crosslinking structure and creeping properties of the UHMWPE fiber.The results show that,the best soaking time of the fiber in n-heptane is 24 h and the best time of UV irradiation is 1.5 h.After crosslinking modification,the creep resistance of UHMWPE fiber is obviously improved.