溴氯化丁基橡胶的制备与性能  

Preparation and Properties of Bromochlorinated Butyl Rubber

作　　者：袁荞龙[1] 漆刚[1] 刘峰[1] 刘青[1,2] 

机构地区：[1]华东理工大学材料科学与工程学院,特种功能高分子材料及相关技术教育部重点实验室,上海200237 [2]江苏圣杰实业有限公司,南京210007

出　　处：《华东理工大学学报（自然科学版）》2014年第2期153-160,共8页Journal of East China University of Science and Technology

基　　金：国家863项目(2009AA03Z538);上海市重点学科项目(B502)

摘　　要：以丁基橡胶（IIR）为原料,在非啮合反向双螺杆挤出机中制备了氯化丁基橡胶（CIIR）,在80℃下用液溴溴化CIIR正己烷溶液获得溴氯化丁基橡胶（BCIIR）。用1 H-NMR、热重分析仪和无转子硫化仪对卤化丁基橡胶的结构、热稳定性和硫化性能进行了研究。结果表明,氯化挤出制备了w（Cl）=1.1%的CIIR,当氯化挤出温度为100~110℃时,有利于生成仲位氯代烯丙基结构,CIIR中尚余少量异戊二烯结构。BCIIR中w（Br）为0.2%~0.8%,并随液溴加入量的增加而提高。CIIR的溴化会导致橡胶的重均分子量和不饱和度下降,但不饱和度仍可保持在1.2%左右。CIIR溴化后热稳定性提高,BCIIR的热分解温度高于CIIR,并随溴质量分数的增加而进一步升高;BCIIR的硫化速度明显加快,比CIIR提高了5%,比IIR提高了14%。Butyl rubber was chlorinated to form chlorinated butyl rubber（CIIR）in non-intermeshing counter-rotating twin-screw extruder,and further brominated in hexane solution by liquid bromine at 80 ℃.Bromochlorinated butyl rubber（BCIIR）was obtained and characterized by proton nuclear magnetic resonance,thermal gravimetry and rotorless curemeter.Results show that CIIR with the mass fraction of chlorine 1.1%is prepared by chlorination extrusion process.Secondary chloro allylic structure in CIIR is facile to achieve when the temperature of chlorination extrusion is in the range of 100—110 ℃. Furthermore,a small amount of isoprene structure is still in CIIR.The mass fraction of bromine in BCIIR is in the range of 0.2%—0.8%,and increases upon the increasing of the amount of liquid bromine.The bromination of CIIR results in decrease of weight-average molecular weight and unsaturation degree of the rubber.However,the unsaturation degree of CIIR retains about 1.2%.The thermal stability of CIIR is improved with bromination.The thermal decomposition temperature of BCIIR is higher than that of CIIR, and enhances with the increase of mass fraction of bromine.The rate of vulcanization of BCIIR expedites markedly,which is 5% higher than that of CIIR,and 14% higher than that of butyl rubber.

关 键 词：丁基橡胶 氯化丁基橡胶 溴氯化丁基橡胶 热稳定性 硫化速度 

分 类 号：TQ330.1[化学工程—橡胶工业]