中空聚合物乳液的制备及其性能研究

Study on preparation and properties of hollow polymer emulsion

以甲基丙烯酸甲酯(MMA)、丙烯酸(AA)、丙烯酸丁酯(BA)、丙烯腈(AN)和苯乙烯(St)为共聚单体,过硫酸铵(APS)为引发剂,十二烷基硫酸钠(SDS)和非离子型乳化剂(OP-10)为阴/非离子型复合乳化剂,采用种子乳液聚合法和碱溶胀后处理法制备了P(MMA/AA/BA)为核、P(St/AA/AN)为壳的纸张施胶用中空聚合物乳液。研究结果表明:当w(引发剂)=0.80%、m(SDS)∶m(OP-10)=2∶1和w(乳化剂)=1.5%时,中空乳液的综合性能较好,其单体转化率较高、乳液黏度适中、粒径较小且分布较窄。

With methyl methacrylate （ MMA ） , acrylic acid （ AA ） , butyl acrylate （ BA ）, acrylonitrile（AN） and styrene （St） as comonomers,ammonium persulfate（APS） as initiator,sodium dodeeyl sulfate（SDS） and non-ionic emulsifier（OP-10） as anionic-nonionic composite emulsifier,a hollow polymer emulsion based on P（MMMAA/BA） as core and P（St/AA/AN） as shell for sizing paper was prepared by seed-emulsion polymerization and alkali swelling post-treatment methods. The research results showed that the hollow emulsion had better combination property because its conversion rate of monomer was higher, emulsion viscosity was moderate, particle size was smaller and particle size distribution was narrower when mass fraction of initiator was 0.80% ,mass ratio of m（SDS）：m（OP-10） was 2：1 and mass fraction of emulsifier was 1.5%.