水性纯丙乳液的合成及其附着性能  

Synthesis and Adhesion Properties of Waterborne Polyacrylate Emulsions

作　　者：闫继芳 王琪 彭辰晨 徐英杰[2] 黄蓓青[2] 魏先福 YAN Ji-fang;WANG Qi;PENG Chen-chen;XU Ying-jie;HUANG Bei-qing;WEI Xian-fu(College of Light Industry and Food Engineering,Nanjing Forestry University,Nanjing 210037,Jiangsu,China;School of Printing and Packaging Engineering,Beijing Institute of Graphic Communication,Beijing 102600,China)

机构地区：[1]南京林业大学轻工与食品学院,江苏南京210037 [2]北京印刷学院印刷与包装工程学院,北京102600

出　　处：《精细化工》2018年第11期1961-1967,共7页Fine Chemicals

基　　金：绿色印刷与出版技术2011协同创新中心-绿色印刷与包装安全领域(04190117029/001)~~

摘　　要：以甲基丙烯酸甲酯（MMA）、丙烯酸异辛酯（2-EHA）分别为硬、软单体,甲基丙烯酸（MAA）为功能单体,过硫酸铵（APS）为引发剂,十二烷基硫酸钠（SDS）、脂肪醇聚氧乙烯醚（AEO-9）为乳化剂,采用半连续种子乳液聚合法合成了不同单体配比的水性聚丙烯酸酯乳液。利用ATR-FTIR、1HNMR、GPC、TG和DMA测定了水性聚丙烯酸酯的结构及性能。结果表明：当m（MMA）∶m（2-EHA）从10∶10减小到7∶13,聚丙烯酸酯乳液的粒径不变（约为100nm）,乳液膜的热稳定性提高,分解温度从327.5℃升高到343.5℃,玻璃化转变温度从21℃降至-3.5℃,乳液的表面张力从39.83 mN/m降至36.71 mN/m、界面张力从19.01 mN/m降至4.87 mN/m、接触角从62.6°降到27.8°,附着牢度从50%提高到95%;当m（MMA）∶m（2-EHA）=7∶13时,乳液的润湿性最好（接触角为27.8°）,附着牢度最高（95%）,满足乳液在BOPP薄膜上的应用要求。说明提高聚合物中软单体含量有利于提高乳液的附着力。Waterborne polyacrylate emulsions with different mass ratios of hard/soft monomer were synthesized by semi-continuous seed emulsion polymerization using methyl methacrylate（MMA）, 2-ethylhexyl acrylate（2-EHA）, methylacrylic acid（MAA） as hard monomer, soft monomer and functional monomer respectively, ammonium persulfate（APS） as initiator, sodium dodecyl sulfate（SDS） and primary alcobol ethoxylate（AEO-9） as emulsifier. ATR-FTIR, 1 HNMR, GPC, TG and DMA were used to characterize the structure and properties of the resulting waterborne polyacrylate. The results showed that when mass ratio of MMA to 2-EHA decreased from 10∶10 to 7∶13, the particle size of the waterborne polyacrylate emulsions kept unchanged, approximately 100 nm. The thermal stability of the polyacrylate films was improved, the decomposition temperature increased from 327.5 ℃ to 343.5 ℃, the glass transition temperature decreased from 21 ℃ to-3.5 ℃. Moreover, the surface tensions of the polyacrylate emulsions decreased from 39.83 mN/m to 36.71 mN/m, the interfacial tensions between the emulsions and BOPP film decreased from 19.01 mN/m to 4.87 mN/m, the contact angles of the emulsions on BOPP film decreased from 62.6° to 27.8°, and the adhesion ratio increased from 50% to 95%. When mass ratio of MMA to 2-EHA was 7∶13, the prepared emulsion had the best wettability（27.8°） and the highest fastness（95%）, which could satisfy the application requirement of polyacrylate emulsion on BOPP film, indicating that increasing the content of soft monomer in the polymer could improve the adhesion of the emulsion.

关 键 词：水性纯丙乳液 润湿性 附着牢度 BOPP薄膜 

分 类 号：TS802.3[轻工技术与工程]