溴化丁苯橡胶的制备及其对聚苯乙烯阻燃性能的影响  

Preparation of Brominated Styrene-butadiene Rubber and Its Flame Retardant Effect on Polystyrene

作　　者：唐鑫 杜中杰[1] 邹威[1] 王洪 张晨[1] 

机构地区：[1]北京化工大学材料科学与工程学院,碳纤维及功能高分子教育部重点实验室,北京100029

出　　处：《中国塑料》2017年第11期114-118,共5页China Plastics

摘　　要：以1,2-二氯乙烷(EDC)为溶剂、三氯化锑(SbCl3)为催化剂、氯化溴(BrCl)为溴化剂制备了溴化丁苯橡胶(BSBR),探究了溴化剂用量对产物中溴含量的影响规律;通过溶液法将制备的BSBR与聚苯乙烯(PS)进行共混,利用热失重分析仪、极限氧指数仪、锥形量热仪等测试,研究了溴含量及BSBR含量对PS材料阻燃性能的影响。结果表明,溴化剂BrCl的用量为70mL时,BSBR中溴原子百分比最大为33.17%;添加BSBR可有效改善PS材料的阻燃性能,且BSBR分子结构中溴含量越高,越有利于提高PS的阻燃性能,其极限氧指数最高可达30.8%;当BSBR中溴含量一定时,随BSBR含量的增加,PS材料的极限氧指数增加,燃烧时的总热释放量减小,不完全燃烧产生的一氧化碳(CO)释放量增大。Brominated styrene-butadiene rubber(BSBR)was prepared by using dichloroethane as a solvent,SbCl3 as a catalyst and BrCl as a brominating agent.The effect of BrCl dosage on the bromine content of BSBR was investigated.Subsequently,BSBR was mixed with polystyrene by a solution method,and the effect of the bromine content of BSBR on the flame-retardant properties of PS composites was investigated by thermogravimetric analysis,limiting oxygen index(LOI)and cone calorimeter.The results indicated that BSBR achieved a maximum bromine atom percentage of33.17 % when the dosage of BrCl was set as 70 mL.The introduction of BSBR could effectively improve the flame retardancy of PS.The higher the bromine content in BSBR,the better the flame-retardant effect on PS.As a result,a maximum LOI of 30.8 vol% was achieved for the flame-retardant PS.Moreover,LOI of the flame-retardant PS increased with an increase of BSBR content,but the total heat release of the combustion decreased.In addition,the release amount of CO increased due to incomplete combustion.

关 键 词：溴化丁苯橡胶 氯化溴 聚苯乙烯 阻燃性能 

分 类 号：TQ325.2[化学工程—合成树脂塑料工业] TQ333.1