CAJ | 학술논문

采用连续滴加预乳液的种子乳液聚合法，合成出固含量为42.76％、乳化剂质量分数为1％的具有核壳结构的苯乙烯丙烯酸酯微乳液．考察了乳化剂用量、羟基单体用量、甲基丙烯酸的用量等因素对乳液粒径及性能的影响．结果表明，聚合在相当于Winsor-I型的聚合体系中进行，由纯单体相（滴入的单体）和O／W微乳相构成，上层单体只起储存库的作用，它在缓慢的搅拌下扩散进入微乳相中．只要微乳液液面上补加的单体不扰动微乳液的平衡，就不会产生粗粒子．单体滴加时间控制在2 h，油酸钠∶OP-10＝1∶1（质量比），NaHCO3占单体质量分数的0.15％，反应温度控制在78～82℃，可使聚合反应平稳进行．
채용련속적가예유액적충자유액취합법，합성출고함량위42.76％、유화제질량분수위1％적구유핵각결구적분을희병희산지미유액．고찰료유화제용량、간기단체용량、갑기병희산적용량등인소대유액립경급성능적영향．결과표명，취합재상당우Winsor-I형적취합체계중진행，유순단체상（적입적단체）화O／W미유상구성，상층단체지기저존고적작용，타재완만적교반하확산진입미유상중．지요미유액액면상보가적단체불우동미유액적평형，취불회산생조입자．단체적가시간공제재2 h，유산납∶OP-10＝1∶1（질량비），NaHCO3점단체질량분수적0.15％，반응온도공제재78～82℃，가사취합반응평은진행．
The styrene-acrylic microemulsion with a core-shell structure having 42.76%solid content and 1%emul-sifier was synthesized by seed emulsion polymerization with the pre-emulsion continuously.The effects of dosage of e-mulsifier, hydroxyl monomer and methacrylic acid on the emulsion particle size and the properties of emulsion were investigated.Results showed that the polymerization was conducted in the system of equivalent Winsor-I type, which was composed of the pure monomer phase (monomer dropwise) and O/W microemulsion phase.The upper monomer only had the function of repository, which diffused into the microemulsion phase by slow stirring.Coarse particles would not form if the addition of the monomer did not disturb the balance of the microemulsion.The polymerization reaction could proceed smoothly with the following conditions:Monomer dropping time within 2 h, oil sodium∶OP-10=1∶1(mass ratio), NaHCO3 accounting for 0.15%of monomer mass fraction, reaction temperature at 78-82℃.