离子液体改性氧化石墨烯/丁苯橡胶复合材料的热降解动力学

摘要

为了提高氧化石墨烯(GO)在丁苯橡胶(SBR)中的分散性,采用离子液体氯化1-烯丙基-3-甲基咪唑(AMIMCl)对GO进行改性,得到了离子液体改性GO(GO-IL).通过乳液混合法制备了GO-IL/SBR复合材料,研究了GO-IL/SBR硫化胶的热稳定性,并分别采用Kissinger法和Flynne-Walle-Ozawa法计算了该硫化胶的热降解活化能.结果表明,与未改性的GO相比,GO-IL能明显提高SBR硫化胶的热稳定性;当填料用量为5份(质量)时,GO-IL/SBR硫化胶的最大热失重温度和热降解活化能比GO/SBR硫化胶分别提高了4.0 ℃和17.35 kJ/mol.%In order to improve the dispersion of graphene oxide (GO) in styrene-butadiene rubber (SBR) matrix, ionic liquid 1-allyl-3-methylimidazolium chloride (AMIMCl) was used to modify GO,and the obtained filler, ionic liquid modified GO (GO-IL), was emulsion blended with SBR to prepare GO-IL/ SBR composite. The thermal stability of GO-IL/ SBR vulcanizate was investigated, and their thermal decomposition activation energy was calculated by Kissinger and Flynne-Walle-Ozawa methods,respectively. The results showed that GO-IL significantly improved the thermal stability of SBR vulcanizate compared with unmodified GO. When the filler was 5 phr, the maximum thermal mass loss temperature and the thermal decomposition activation energy of GO-IL/ SBR vulcanizate increased by 4. 0 ℃ and 17. 35 kJ/ mol compared with those of GO/ SBR vulcanizate separately.