三元乙丙橡胶/甲基乙烯基硅橡胶共混胶复合硫化体系的性能

Study on the Composite Curing System of EPDM/MVQ Blends

对2种复合硫化体系:过氧化物(DCP)/硫黄(S)和过氧化物(DCP)/硫载体(TMTD)复合硫化体系进行研究,采用均匀试验设计法进行数据分析。研究发现,用S与DCP复合硫化时,拉伸强度出现了先减小后增大的趋势,撕裂强度一直增大;用TMTD与DCP复合硫化时,随DCP/TMTD用量的增加,拉伸强度、撕裂强度和压缩永久变形率均出现先增大后减小的趋势,而扯断伸长率一直减小。后固定DCP的含量为2份时,研究TMTD和S分别和DCP复合时的变化规律。实验结果表明,TMTD较之S,更适合与DCP复合使用。

Two composite vulcanization systems of EPDM/MVQ blends are studied in this paper,which are peroxide（DCP）/sulfur（S） and peroxide（DCP）/carrier（TMTD） curing systems.Homogeneous experimental design method is used to analyze the data.The study shows that the tensile strength decreased first and then increased,while tear strength increased always when DCP and S were used.When the dosages of DCP/TMTD increased,tensile strength,tear strength,compression set all increased first and then decreased,but elongation at break decreased always.When the content of DCP is 2,the effects of the contents of S/DCP and TMTD/DCP on the properties of the vulcanization were studied.The results show that TMTD is more suitable to DCP than S.