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采用半连续乳液聚合法合成了以丙烯酸丁酯和甲基丙烯酸甲酯为成核单体,丙烯酸丁酯(MAA)、甲基丙烯酸甲酯(BA)、丙烯酸(AA)和γ―甲基丙烯酰氧基丙基三甲氧基硅烷为成壳单体的核壳结构乳液。采用马尔文纳米粒度仪等研究了乳液的粒径及其分布与引发剂和乳化剂用量之间的关系,粒径对乳液稳定性的影响以及乳液粒径与温度的关系,通过透射电镜对乳液微粒形态进行了分析。结果表明,乳液的粒径随着引发剂和乳化剂用量的增加而减小,乳液粒径在30～60℃时较为稳定,当引发剂过硫酸铵质量分数为0.55%,乳化剂十二烷基苯磺酸钠质量分数为2%时,制得的乳液粒径在120 nm左右,具有明显的核壳结构和较好的稳定性。
A series of copolymers of butyl acrylate (MAA), methyl methacrylate (BA), acrylic acid (AA) and γ-methylpropenoate with butyl acrylate and methyl methacrylate as monomers were synthesized by semi- The acyloxypropyltrimethoxysilane is a core-shell structure emulsion of a shell-forming monomer. Using Malvern nanoparticle analyzer to study the relationship between the particle size and distribution of emulsifier and the amount of initiator and emulsifier, the effect of particle size on emulsion stability and the relationship between emulsion particle size and temperature, the emulsion Particle morphology was analyzed. The results showed that the particle size of the emulsion decreased with the increase of the amount of initiator and emulsifier. The particle size of the emulsion was stable at 30-60 ℃. When the initiator ammonium persulfate content was 0.55%, the emulsifier dodecane When the content of sodium benzenesulfonate is 2%, the particle size of the prepared emulsion is about 120 nm, which has obvious core-shell structure and good stability.