橡胶无氧二段硫化工艺的研究
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摘要
对采用硫黄硫化体系和过氧化物硫化体系的丁腈橡胶(NBR)和三元乙丙橡胶(EPDM)进行无氧和有氧二段硫化,并对硫化胶的物理性能进行对比。结果表明:在适当温度与时间下进行二段硫化可以在一定程度上改善硫化胶的物理性能,NBR比EPDM硫化胶、硫黄硫化体系比过氧化物硫化体系硫化胶的改善效果更为显著;无氧和有氧二段硫化的硫化胶物理性能差异不大;氮气对流模具法二段硫化的硫化胶质量损失主要源于增塑剂挥发,这在一定程度上影响了硫化胶的物理性能。
Nitrile butadiene rubber(NBR) and ethylene-propylene-diene rubber(EPDM)with sulfur curing system and peroxide curing system were vulcanized by post vulcanization with or without oxygen,and the physical properties of the vulcanizates were compared.The results showed that,post vulcanization at appropriate temperature and time could improve the physical properties of the vulcanizates to a certain extent,and the improvement was more significant for NBR vulcanizate and sulfur cured vulcanizate.There was no significant difference in the physical properties between the vulcanizates post cured with or without oxygen.The mass loss of the vulcanizate cured by post vulcanization using nitrogen convection mold method was mainly due to the volatilization of plasticizer,which affected the physical properties of the vulcanizates to a certain extent.
Nitrile butadiene rubber(NBR) and ethylene-propylene-diene rubber(EPDM)with sulfur curing system and peroxide curing system were vulcanized by post vulcanization with or without oxygen,and the physical properties of the vulcanizates were compared.The results showed that,post vulcanization at appropriate temperature and time could improve the physical properties of the vulcanizates to a certain extent,and the improvement was more significant for NBR vulcanizate and sulfur cured vulcanizate.There was no significant difference in the physical properties between the vulcanizates post cured with or without oxygen.The mass loss of the vulcanizate cured by post vulcanization using nitrogen convection mold method was mainly due to the volatilization of plasticizer,which affected the physical properties of the vulcanizates to a certain extent.
引文
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[12]丁国芳,周安伟,石耀刚,等.丁基橡胶阻尼材料的耐热空气老化性能及老化机理研究[J].橡胶工业,2016,63(4):202-205.
[2]翁国文.二段硫化条件对均聚氯醚橡胶(CO)性能的影响[J].特种橡胶制品,2007,28(1):30-32.
[3]李志伟,王迪珍,程万鹏.二段硫化条件对共聚型氯醚橡胶性能的影响[J].橡胶工业,2003,50(5):271-274.
[4]蒋化学,何晓东.抗硫化返原剂WK-901在工程机械轮胎胎面胶中的应用[J].橡胶科技,2016,14(5):24-26.
[5]王思静,熊金平,左禹.橡胶老化特征及防护技术研究进展[J].合成材料老化与应用,2009,38(3):41-45.
[6]李子安,魏申莉.测定二段硫化和热老化对橡胶胶料动态性能的影响[J].橡塑资源利用,2009(4):17-25.
[7]李昂.橡胶的老化现象及其老化机理[J].特种橡胶制品,2009,30(5):56-67.
[8]张又文,马良清,李红伟,等.老化对轮胎及轮胎材料性能的影响[J].橡胶工业,2018,65(5):548-551.
[9]段友顺,王彦,于洋.氟橡胶耐热氧老化性能的研究[J].橡胶工业,2018,65(7):768-771.
[10]陆波,杨凯军,金耀程,等,过氧化物/硫黄硫化体系对EPDM硫化橡胶力学性能的影响[J].橡塑技术与装备,2016,42(1):59-63.
[11]陈朝辉,王迪珍.ACM橡胶二段硫化交联网络结构的研究[J].合成材料老化与应用,2001,30(2):10-12.
[12]丁国芳,周安伟,石耀刚,等.丁基橡胶阻尼材料的耐热空气老化性能及老化机理研究[J].橡胶工业,2016,63(4):202-205.