歧化松香-醋酸乙烯酯乳液的制备及其性能  

Preparation and properties of disproportionated rosin-vinyl acetate emulsion

作　　者：高玉梅[1] 陈小鹏[1,2,3] 陆泰榕 韦小杰[1,2] 吕学森[1] 

机构地区：[1]广西大学化学化工学院,广西南宁530004 [2]广西石化资源加工及过程强化技术重点实验室,广西南宁530004 [3]广西生物质乙醇高分子材料工程技术研究中心,广西河池546307 [4]广西广维化工有限责任公司,广西河池546307

出　　处：《中国胶粘剂》2015年第8期1-4,共4页China Adhesives

基　　金：广西科技攻关项目(桂科攻14122005-34);广西创新计划项目(2014CXJHA08);广西自然科学基金项目(2013GXNSFAA0190507;2014GXNSFDA118010)

摘　　要：以醋酸乙烯酯(VAc)为单体、歧化松香为改性剂、聚乙烯醇(PVA-1788)为保护胶体、十二烷基硫酸钠(SDS)为乳化剂和过硫酸铵(APS)为引发剂,采用种子细乳液法制备了歧化松香改性聚醋酸乙烯酯(PVAc)乳液。采用单体半连续滴加工艺,考察了PVA-1788、SDS、APS、歧化松香掺量以及反应温度对乳液聚合反应及其性能的影响。研究结果表明:最佳聚合条件是w(PVA-1788)=8%、w(SDS)=2.0%、w(APS)=0.08%、w(歧化松香)=4%(均相对于VAc质量而言)和聚合温度为75℃,此时,PVAc复合乳液的粘接强度为10.50 MPa、胶膜吸水率为15.6%、乳液粒径为331.1 nm和单体转化率为97.9%。With vinyl acetate（VAc） as monomer,disproportionated rosin as modifier, polyvinyl alcohol（PVA- 1788） as protective colloid, sodium dodecyl sulfate（SDS） as emulsifier and ammonium persulfate（APS） as initiator, a polyvinyl acetate （PVAc） emulsion modified by disproportionated rosin was prepared by seed miniemulsion. The influences of some factors （PVA- 1788 contents, SDS contents, APS contents, disproportionated rosin contents, and reaction temperatures） on polymerization and properties of emulsion were investigated by semi- continuous dropping process of monomers. The research results showed that the optimal polymerization conditions were obtained when mass fractions of PVA- 1788, SDS, APS, and disproportionated rosin were 8%, 2.0%, 0.08%, and 4% in VAc, and polymerization temperature was 75 ℃.Here, the bonding strength of PVAc compound emulsion was 10.50 MPa, water absorption of film was 15.6%, particle size of emulsion was 331.1 nm, and conversion rate of monomer was 97.9%.

关 键 词：歧化松香 醋酸乙烯酯 聚醋酸乙烯酯 乳液 种子聚合 

分 类 号：TQ331.491[化学工程—橡胶工业]