醋丙/纳米SiO_2复合乳液的制备及其在复膜胶中的应用  

Preparation of vinyl acetate-acrylate/nano-SiO_2 composite emulsion and its application in laminating adhesive

作　　者：仇国营 董奎生 黄增芳[2] 刘孝波[1] 

机构地区：[1]电子科技大学微电子与固体电子学院,四川成都610054 [2]电子科技大学中山学院化学与生物工程学院,广东中山528402

出　　处：《中国胶粘剂》2015年第4期23-26,共4页China Adhesives

基　　金：广东省自然科学基金项目(S2013010013580;9452840301003542);中山市科技计划项目(2014A2FC309)资助

摘　　要：采用溶胶-凝胶法制备了表面含可聚合官能团的纳米Si O2(二氧化硅)粒子;然后以丙烯酸丁酯(BA)为软单体、醋酸乙烯酯(VAc)为硬单体、丙烯酸羟乙酯(HEA)和丙烯酸(AA)为功能单体,采用乳液聚合法制备了醋丙/纳米Si O2复合乳液,并将其用于纸/塑和塑/塑复合。研究结果表明:随着VAc或纳米Si O2掺量的不断增加,复膜胶的黏度和持粘力增大、初粘力减小、剥离强度呈先升后降态势,而乳液的粒径则随VAc掺量增加而增大;当w(VAc)=40%、w(纳米Si O2)=1.5%(均相对于单体总质量而言)时,纸/塑、塑/塑制品的剥离强度(分别为8.32、6.79 N/2.5 cm)相对最大;该复膜胶具有VAc、丙烯酸酯和纳米Si O2的复合结构,其热失重5%时的热分解温度、玻璃化转变温度(Tg)分别为310、-40℃。The nano-silicon dioxide （nano-SiO2） particles, whose surfaces contain some polymerizable functional groups, were prepared by sol-gel method. Then, a vinyl aeetate-aerylate/nano-SiO2 composite emulsion, which was used for laminating composite of paper/plastic or plastic/plastic, was prepared by emulsion polymerization when butyl acrylate （BA） was used as soft monomer, vinyl acetate （VAe） was used as hard monomer, and hydroxyethyl acrylate （HEA） and acrylic acid （AA） were used as functional monomers. The research results showed that the viscosity and hold tack of laminating adhesive were increased, the initial tack of laminating adhesive was decreased, and the peeling strength of laminating adhesive had the trend of rise-fall with increasing VAe or nano-SiO2 contents, but the particle sizes of emulsion were increased with increasing VAc contents. The paper/plastic and plastic/plastic products had the relatively maximal peeling strengths, which were 8.32,6.79 N/2.5 em respectively, when mass fractions of VAe and nano- SiO2 were 40% and 1.5% respectively in total monomers. The laminating adhesive had the composite structure of the VAe, acrylate and nano-SiO2, and its thermal decomposition temperature at 5% thermal weight loss and glass transition temperature （Tg） were 310,-40 ℃ respectively.

关 键 词：复膜胶 醋丙乳液 纳米二氧化硅 复合乳液 

分 类 号：TQ437.2[化学工程] TQ433.436