炭黑与橡胶的相容性对乙丙橡胶中炭黑引起的焦烧的影响  

Effect of Compatibility between Carbon Black and Rubber on Scorch Phenomenon of EPDM Compound Caused by Carbon Black

作　　者：吴晓林 赵国刚 姜宝环 张中山 WU Xiaolin;ZHAO Guogang;JIANG Baohuan;ZHANG Zhongshan(Shandong Link Advanced Materials Co.,Ltd,Weifang 262600,China)

机构地区：[1]山东联科新材料有限公司,山东潍坊262600

出　　处：《橡胶工业》2022年第5期337-341,共5页China Rubber Industry

摘　　要：三元乙丙橡胶(EPDM)因大量填充炭黑引起的焦烧(简称炭黑焦烧)会影响胶料的混炼、储存和后续加工过程。本工作选用常规炭黑N550和经过后处理的炭黑N550,研究炭黑与橡胶的相容性对EPDM混炼胶的炭黑焦烧的影响。结果表明,在生产过程中对炭黑N550进行后处理可将表面的含氧官能团分解,从而降低其氧含量和表面极性,增大pH值。与常规炭黑N550相比,经后处理的炭黑N550与EPDM的相互作用强,相容性好;经过后处理的炭黑N550混炼胶的初始门尼粘度降低5%左右,炭黑焦烧的活化能提高30%以上,炭黑焦烧时间t5延长30%以上,Payne效应降低10%以上,可使硫化胶的滞后损失和生热降低。The scorch of ethylene-propylene-diene rubber(EPDM)compound caused by a large loading of carbon black(carbon black scorch for short)affected the mixing,stock storage and downstream processing of the compound.In this work,the regular and post-treated carbon black N550 were adopted to investigate the effect of compatibility between carbon black and rubber on carbon black scorch of EPDM compound.The results showed that,the post-treatment of carbon black N550 in the production process could decompose some oxygen containing groups on the carbon black surface,thereby reducing its oxygen content and surface polarity,and increasing the pH value.Compared with the regular carbon black N550,the post-treated carbon black N550 had improved compatibility and strengthened interaction with EPDM.The initial Mooney viscosity of the compound with the post-treated carbon black N550 was reduced by about 5%,the activation energy of carbon black scorch was increased by more than 30%,the carbon black scorch time t5 was prolonged by more than 30%,and the Payne effect was reduced by 10%,which could reduce the hysteresis loss and heat built up of the vulcanizate.

关 键 词：三元乙丙橡胶 炭黑 焦烧 表面极性 相容性 活化能 PAYNE效应 

分 类 号：TQ330.381[化学工程—橡胶工业] TQ333.4