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以乙酰乙酸基甲基丙烯酸乙酯(AAEM)为功能单体,通过半连续种子乳液聚合制备出侧链含活性酮羰基的丙烯酸树脂乳液(PA),加入明胶,可得到稳定性高且具有室温自交联功能的丙烯酸树脂-明胶复合乳液(PAG)。采用红外光谱(FTIR)对PA-G膜中的交联结构进行表征,用接触角测定仪(CA)、原子力显微镜(AFM)、差示量热扫描仪(DSC)等对PA-G膜进行性能测试。结果表明,这种PA-G复合乳液的涂膜在硬度、热学性能、力学性能及抗水性等方面表现出不同特点,硬度和玻璃化转变温度得到显著提高,抗张强度大幅度提高,但断裂伸长率均有所降低;通过AAEM-明胶之间的适度交联可赋予PA-G膜良好的抗水性,且其表面相对粗糙度变化不大。
Acrylic resin emulsion (PA) with side-chain containing active ketone carbonyl groups was prepared by semi-continuous seed emulsion polymerization using acetoacetoxyethyl methacrylate (AAEM) as functional monomer. Gelatin was added to obtain high stability and room temperature Self-crosslinking acrylic-gelatin composite emulsion (PAG). The crosslinked structure of PA-G membrane was characterized by FTIR and the PA-G membrane was characterized by means of contact angle measurement (CA), atomic force microscopy (AFM) and differential scanning calorimeter (DSC) Performance Testing. The results show that the coating of PA-G composite emulsion shows different characteristics in hardness, thermal properties, mechanical properties and water resistance, the hardness and glass transition temperature are significantly increased, tensile strength is greatly improved, but the fracture The elongation of the PA-G film was reduced by moderate cross-linking between AAEM and gelatin, and the relative surface roughness of the PA-G film was not changed much.