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以甲基丙烯酸甲酯(MMA)、丙烯酸丁酯(BA)、丙烯酸(AA)和双丙酮丙烯酰胺(DAAm)为共聚单体,采用半连续种子乳液聚合工艺,合成了具有核–壳结构的室温自交联水性聚丙烯酸酯乳液。以十二烷基硫酸钠(SDS)与辛基酚聚氧乙烯醚(OP-10)为复合乳化剂,研究了其用量对聚合反应稳定性的影响,讨论了不同DAAm用量下乳胶粒的粒径分布、漆膜耐水性和力学性能,确定了较佳的用量:复合乳化剂用量为单体质量的3.0%,w(DAAm)为4%。透射电镜(TEM)分析表明,乳胶粒具有明显的核–壳结构。热分析表明,以己二酰肼(ADH)为交联剂,交联后漆膜的玻璃化转变温度明显提高,红外光谱分析证明了酮肼交联反应的发生。
In this paper, methyl methacrylate (MMA), butyl acrylate (BA), acrylic acid (AA) and diacetone acrylamide (DAAm) as comonomers were synthesized by semi-continuous seed emulsion polymerization Room temperature self-crosslinking water-based polyacrylate emulsion. The effect of the amount of sodium dodecyl sulfate (SDS) and octylphenol polyoxyethylene ether (OP-10) on the stability of the polymerization was studied. The effects of the amount of DAAm Diameter distribution, water resistance and mechanical properties of the film, the preferred dosage is determined: the amount of the composite emulsifier is 3.0% of the monomer mass and the w (DAAm) is 4%. Transmission electron microscopy (TEM) analysis showed that the latex particles have a distinct core-shell structure. The results of thermal analysis showed that the glass transition temperature of the film after the cross-linking was improved by using adipic acid hydrazide (ADH) as crosslinking agent, and the FT-IR showed that the cross-linking reaction of ketone hydrazine occurred.