醋酸乙烯-乙烯乳液聚合反应的新型氧化还原引发剂研究  

Study on a New Redox Initiator System for Emulsion Polymerization of Vinyl Acetate and Ethylene

作　　者：梁瑞雪[1] 张鹏鹏[1] 韦彩琴 黄馨平 殷文师 陈小鹏[1] 

机构地区：[1]广西大学化学化工学院,广西南宁530004

出　　处：《高校化学工程学报》2016年第4期843-849,共7页Journal of Chemical Engineering of Chinese Universities

基　　金：广西科技攻关项目(14122005-34;1598007-24);广西创新计划经费项目(2014CXJHA08)

摘　　要：以新型绿色TBHP-Fe^(2+)-So E氧化还原体系替代传统H_2O_2-Fe^(2+)-ZFS/H_2O_2-ZFS引发体系进行醋酸乙烯-乙烯(VAE)乳液聚合反应研究。将TBHP-Fe^(2+)-So E体系与传统H2O2-Fe^(2+)-ZFS体系的引发效率进行对比,并考察了TBHP-Fe^(2+)-So E引发体系中各组分含量以及TBHP溶液进料流速对VAE乳液聚合动力学的影响,结果表明:当反应温度恒定为80℃时,TBHP-Fe^(2+)-So E体系与H_2O_2-Fe^(2+)-ZFS体系引发效率相近;TBHP与So E反应可生成具有引发活性的自由基,并且当微量的Fe^(2+)存在时,Fe^(2+)可提高TBHP-So E氧化还原对中自由基的产生效率;TBHP-Fe^(2+)-So E体系引发效率随着Fe^(2+)浓度、TBHP与So E摩尔配比和TBHP进料流速的增大而升高;当TBHP-Fe^(2+)-So E用量为单体总质量的0.25%时表现出较高的引发效率。A new environment-friendly TBHP-Fe2＋-SoE （sodium erythorbate） redox initiator system was applied instead of traditional H2O2-Fe2＋-ZFS or H202-ZFS systems for the emulsion polymerization of vinyl acetate and ethylene. The initiation efficiency of the TBHP-Fe2＋-SoE and the H2O2-Fe2＋-ZFS systems was compared, and the effects of components concentration in the system and the feeding rate of TBHP solution on the polymerization kinetics were investigated. The results show that the initiation efficiency of the TBHP-Fe〉-SoE system is similar as that of the H2O2-Fe2＋-ZFS system when the reaction temperature is 80℃. Active radicals are produced by the reaction of TBHP and SoE, which increase by addition of small amount of Fe2＋. The initiation efficiency of the TBHP-Fe2＋-SoE system increases with the increase of Fe2＋, TBHP/SoE molar ratio and TBHP feeding rate. The system exhibits the highest initiation efficiency when the concentration of the TBHP-Fe2＋-SoE redox initiator system is 0.25% of the total VAc monomer weight.

关 键 词：叔丁基过氧化氢 D-异抗坏血酸钠 引发体系 乙烯 醋酸乙烯 乳液聚合 

分 类 号：TQ314.24[化学工程—高聚物工业] TQ433.43