异丁烯残留量对丁基橡胶溴化的影响  

Effects of Residual Isobutene Monomer on Butyl Rubber Bromination

作　　者：陈杉[1,2] 李树新[2] 郭文莉[2] 武海川 张兰[2] 

机构地区：[1]北京化工大学材料科学与工程学院,北京100029 [2]北京石油化工学院特种弹性体复合材料北京市重点实验室,北京102617

出　　处：《石油化工高等学校学报》2014年第5期12-15,共4页Journal of Petrochemical Universities

基　　金：国家重点基础研究发展计划(2012CB626800)

摘　　要：溶液法制备丁基橡胶可以直接得到丁基橡胶胶液,为溴化节省工艺步骤。但由于丁基橡胶优异的气密性,使得胶液中未反应的异丁烯单体很难彻底脱除。采用顶空气相色谱建立了测定胶液中异丁烯质量浓度的方法,将含有不同质量浓度异丁烯的胶液溴化,探究了异丁烯残留量对丁基橡胶溴化的影响。结果表明,随着胶液中异丁烯质量浓度的增加,溴化丁基橡胶的含溴质量分数不断降低,且溴代仲位烯丙基结构与溴代伯位烯丙基结构的相对摩尔比值逐渐增大。Butyl rubber solution directly can be obtained in the synthesis of butyl rubber by solution process,which shortens the bromination steps.While in this process it is difficult to remove the isobutylene monomer in butyl rubber solution completely because of the great air-tightness of butyl rubber.The mass concentration of residual isobutylene in butyl rubber solution was effectively determined by Headspace Gas Chromatography.The effects of residual isobutene monomer on bromination of butyl rubber were investigated.The results showed that the bromine content decreased rapidly,while the mole ratio of structure II and structure III increased with the increasing of the concentration of isobutylene.

关 键 词：丁基橡胶 溴化 异丁烯 顶空气相色谱 残留单体 

分 类 号：TE626.8[石油与天然气工程—油气加工工程] TQ333.6[化学工程—橡胶工业]