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采用乳液聚合方法合成了聚丙烯酸酯树脂微乳液,研究了混合单体总用量、引发剂偶氮二异丁腈(AIBN)用量以及乳化剂十二烷基硫酸钠(SDS)和OP-10的配比与用量对微乳液的乳胶粒径、ζ电位、单体转化率以及乳液涂层耐盐雾性的影响,对微乳液优化产物进行了红外光谱和粒径分布分析。研究结果表明,单体丙烯酸和丙烯酸十八酯之间成功地发生了自由基共聚反应;当w(混合单体)为10%,w(AIBN)为0.8%,乳化剂m(SDS):m(OP-10)为2:1、用量为单体总用量的8%时,所得的微乳液的稳定性和分散性较好,单体转化率为93.8%,乳胶平均粒径为90.5nm,ζ电位为38.6mV,对应的涂层的耐盐雾性为1级。该微乳液可用于真空镀铝薄膜的表面防护。
Polyacrylate resin microemulsion was synthesized by emulsion polymerization. The effects of the total amount of monomer mixture, the amount of azobisisobutyronitrile (AIBN) and the emulsifiers sodium dodecyl sulfate (SDS) and OP-10 Ratio and dosage of the microemulsion on the latex particle size, zeta potential, monomer conversion and salt spray resistance of the emulsion coating, the optimized products of the microemulsion were analyzed by infrared spectroscopy and particle size distribution. The results showed that the free radical copolymerization was successfully carried out between the monomer acrylic acid and octadecyl acrylate. When w (mixed monomer) was 10%, w (AIBN) was 0.8%, emulsifier m (SDS): m (OP-10) was 2: 1, the amount of 8% of the total amount of the monomer, the resulting microemulsion stability and dispersion better, the monomer conversion was 93.8%, the average particle size of latex was 90.5nm, The zeta potential was 38.6 mV and the corresponding coating had a salt spray resistance of level 1. The microemulsion can be used for surface protection of vacuum aluminum film.