偶联剂KH171接枝改性锦纶66短纤维/天然橡胶复合材料的性能研究

Study on Properties of Coupling Agent KH171 Grafting Modified Nylon 66 Short Fiber/NR Composites

采用乙烯基三甲氧基硅烷(偶联剂KH171)对锦纶66(PA66)短纤维进行接枝改性,研究偶联剂KH171接枝改性PA66短纤维/天然橡胶(NR)复合材料的性能。结果表明:偶联剂KH171接枝改性PA66短纤维提高了其与NR的界面粘合性;与未改性PA66短纤维/NR复合材料相比,偶联剂KH171接枝改性PA66短纤维/NR复合材料的定伸应力和撕裂强度明显提高,在改性偶联剂KH171溶液质量分数为0.15时提高幅度最大,且复合材料的损耗因子峰值降低。

The nylon 66(PA66)short fiber was modified by grafting of vinyl trimethoxysilane(coupling agent KH171),and the properties of KH171 grafting modified PA66 short fiber/natural rubber(NR)composites were studied.The results showed that the grafting modification of PA66 short fiber with KH171 improved the interfacial adhesion between PA66 short fiber and NR.Compared with unmodified PA66 short fiber/NR composite,the modulus and tear strength of KH171 grafting modified PA66 short fiber/NR composite increased obviously,and the maximum increase was obtained when the mass fraction of KH171 solution was 0.15,and the peak of the loss factor of the composite was reduced.