摘要
利用差示扫描量热仪、凝胶渗透色谱仪、核磁共振波谱仪、橡胶加工分析仪及氧气透过率测定仪,对国产牌号溴化丁基橡胶(BIIR)BIIR 2828与进口牌号BIIR 2222和BIIR 2030的结构及性能进行了表征分析。结果表明,3个牌号BIIR生胶的溴含量由大到小依次为BIIR 2222、BIIR 2828、BIIR 2030,玻璃化转变温度由低到高依次为BIIR 2828、BIIR 2030、BIIR 2222,重均分子量由高到低依次为BIIR 2030、BIIR 2828、BIIR 2222,分子量分布由宽到窄依次为BIIR 2030、BIIR 2222、BIIR 2828;3个牌号BIIR均具有优异的流变性能、加工安全性及耐热氧老化性能,其中BIIR 2828的焦烧时间和正硫化时间居中,交联密度最大,耐寒性、热稳定性和气密性最佳。
The structure and properties of three kinds of different bromobutyl rubbers,domestic BIIR 2828 and imported BIIR 2030 and BIIR 2222,were characterized with differential scanning calorimeter,gel pemeation chromotographer,magnetic resonance spectrometer,rubber process analyzer and oxygen transmittance tester.The results showed that bromine content of three kinds of bromobutyl rubbers from high to low were followed by BIIR 2222,BIIR 2828,BIIR 2030,glass transition temperature from low to high was followed by BIIR 2828,BIIR 2030,BIIR 2222,weight average molecular weight from high to low was followed by BIIR 2030,BIIR 2828,BIIR 2222 and molecular weight distribution from wide to narrow were followed by BIIR 2030,BIIR 2222,BIIR 2828.Three kinds of bromobutyl rubbers all exhibited excellent rheological property,processing safety and thermaloxidative aging property,and scorch time and optimum curing time of BIIR 2828 were less than those of BIIR 2030 and more than those of BIIR 2222,crosslinking density of BIIR 2828 was the biggest,and cold resistance,thermal stability and gas permeability of BIIR 2828 were also better than those of 2030 and BIIR 2222.
作者
牟晓娟
刘振学
曹堃
高波
周德芳
任学斌
郝福兰
MOU Xiao-juan;LIU Zhen-xue;CAO Kun;GAO Bo;ZHOU De-fang;REN Xue-bin;HAO Fu-lan(Shandong Provincial Key Laboratory of Olefin Catalysis and Polymerization,Binzhou 256500,China;Shandong Chambroad Sinopoly New Material Co Ltd,Binzhou 256500,China)
出处
《合成橡胶工业》
CAS
北大核心
2020年第6期486-491,共6页
China Synthetic Rubber Industry
关键词
溴化丁基橡胶
微观结构
分子量分布
玻璃化转变温度
耐热氧老化性能
热稳定性
气密性
bromobutyl rubber
microstructure
molecular weight distribution
glass transition temperature
thermal-oxidative aging property
thermal stability
gas permeability
