探讨甜菜碱(三甲铵乙内酯,天然橡胶非胶组分)对聚异戊二烯橡胶(IR)硫化特性、强伸性能和热稳定性能的影响。结果表明:与未加甜菜碱的IR相比,添加甜菜碱的IR硫化速度显著提高,交联密度增大,强伸性能改善,热稳定性能略有提高;当甜菜碱用量为0.5份时,IR的综合性能最佳。 The effects of betaine (betaine, natural rubber non-gum component) on the vulcanization, elongation and thermal stability of polyisoprene rubber (IR) were investigated. The results showed that compared with IR without betaine, the IR cure rate of betaine was significantly increased, the crosslinking density was increased, the tensile strength was improved and the thermal stability was slightly improved. When the content of betaine was 0.5, IR’s best overall performance.