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采用核壳乳液聚合的方法,以苯乙烯、丙烯酸丁酯和丙烯酸为共聚单体,原位制备了聚合墨粉用含蜡苯丙复合乳液。探讨了巴西棕榈蜡用量对单体转化率、凝聚率、复合乳液粒径及其分布、Zeta电位、共聚物的玻璃化转变温度以及相对分子质量及其分布的影响。结果表明,巴西棕榈蜡的加入对聚合稳定性影响不大;随着其用量的增加,乳液粒径、Zeta电位、聚合物玻璃化转变温度降低,而相对分子质量增大。当其用量为3%(wt)时,聚合物具有较适宜的Tg和相对分子质量,分别为65.9℃和89,000。
The core-shell emulsion polymerization method, styrene, butyl acrylate and acrylic acid as comonomer, prepared in situ polymerization of waxy styrene-acrylic emulsion. The effects of the amount of carnauba wax on the monomer conversion, the aggregation rate, the size and distribution of the composite emulsion, the Zeta potential, the glass transition temperature of the copolymer and the relative molecular mass and their distribution were discussed. The results showed that the addition of carnauba wax had little effect on the polymerization stability. The particle size, Zeta potential and the glass transition temperature decreased with the increase of the amount of carnauba wax, while the relative molecular mass increased. When the amount of 3% (wt), the polymer has a more suitable Tg and relative molecular mass, respectively 65.9 ℃ and 89,000.