甲基丙烯酸羟乙酯接枝天然橡胶对白炭黑/天然橡胶复合材料性能的影响

Effects of HEMA Grafted NR on Properties of Silica/NR Composites

研究甲基丙烯酸羟乙酯(HEMA)接枝天然橡胶(NR)(NR-g-HEMA)接枝率和用量对白炭黑/NR复合材料性能的影响。结果表明:与未加入NR-g-HEMA的白炭黑/NR复合材料相比,加入NR-g-HEMA的白炭黑/NR复合材料的硫化速度、交联程度、邵尔A型硬度、定伸应力和撕裂强度增大,压缩疲劳温升明显降低;当NR-g-HEMA接枝率为10%和用量为10份时,白炭黑/NR复合材料的拉伸强度最大,压缩疲劳温升最低;NR-g-HEMA与NR相容性较好,加入NR-gHEMA的白炭黑/NR复合材料中白炭黑在橡胶相中分散更均匀,两者具有更强的界面结合效果。

The effects of graft ratio and amount of 2-hydroxyethyl methacrylate(HEMA)grafted natural rubber(NR)(NR-g-HEMA)on the properties of silica/NR composites were investigated.The results showed that,compared with the silica/NR composites without NR-g-HEMA,the vulcanization rate,cross-link degree,Shore A hardness,modulus and tear strength of the silica/NR composites with NR-gHEMA increased,and the compression fatigue temperature rise decreased significantly.When NR-g-HEMA grafting rate was 10%and amount was 10 phr,the tensile strength of silica/NR composites was the largest,and the compression fatigue temperature rise was the lowest.NR-g-HEMA had good compatibility with NR,silica was more uniformly dispersed in the rubber phase with the addition of NR-g-HEMA,and the silica and rubber had stronger interfacial bonding effect.