2023,Vol.37,No.1工艺试验收稿日期:20220706基金项目:江苏省徐州市科技计划项目(KC21042)作者简介:张兆红(1969—),女,硕士,副教授,主要从事高分子复合材料性能研究,E-mail:zzhandxu@sina.comdoi:10．16597/j．cnki．issn．1002154x．2023．01．007三元乙丙橡胶/硅藻土复合材料的制备与性能研究张兆红∗刘彤陈帅季昌雷王胜(徐州工业职业技术学院,江苏徐州221140)摘要用机械共混法制备了三元乙丙橡胶(EPDM)/硅藻土复合材料,研究了硅藻土用量和硅烷偶联剂KH570用量对复合材料工艺性能、力学性能、耐老化性能的影响,并对比了硅藻土、陶土和碳酸钙对EPDM的补强性。结果表明,随着硅藻土用量的增加,复合材料的焦烧时间缩短、硫化时间延长、门尼黏度增大,力学性能和耐老化性能呈下降趋势,当硅藻土用量为20份时复合材料的拉伸强度、撕裂强度和扯断伸长率较大;偶联剂用量为硅藻土的1.5%时对硅藻土的改性效果较好,经改性的硅藻土对EPDM的补强性与陶土相当、优于碳酸钙。关键词三元乙丙橡胶硅藻土偶联剂复合材料中图分类号:TQ316.6文献标志码:APreparationandPropertiesofEPDM/DiatomiteCompositesZhangZhaohong∗LiuTongChenShuaiJiChangleiWangSheng(XuzhouCollegeofIndustrialTechnology,JiangsuXuzhou221140)AbstractEthylenepropylenedienemonomer(EPDM)/diatomitecompositeswerepreparedbymechanicalblending.TheeffectsoftheamountofdiatomiteandsilanecouplingagentKH570onthetechnologicalproperties,mechanicalpropertiesandagingresistanceofthecompositeswerestudied.Thereinforcingpropertiesofdiatomite,clayandcalciumcarbonateonEPDMwerecompared.Theresultsshowedthatwiththeincreaseofdiatomitedosage,thescorchtimeofthecompositereduced,thecuringtimeextended,theMooneyviscosityincreased,andthemechanicalpropertiesandagingresistancedecreased.Whentheamountofdiatomiteis20phr,thetensilestrength,tearstrengthandelongationatbreakofthecompositewaslarge.Andwhenthedosageofcouplingagentis1.5%ofdiatomite,themodificationeffectwasbetter.ThestrengthofdiatomitemodifiedwithappropriatecouplingagentonEPDMrubberwasequaltoclayandbetterthancalciumcarbonate.Keywordsethylenepropylenedienemonomerdiatomitecouplingagentcompositematerial硅藻土是一种天然存在的、柔软的硅质沉积岩,容易破碎成细小的白色至灰白色粉末,由硅藻...
