Binary mixtures of anionic double-chain sulfonate emulsifiers, sodium di-isodecyl sulfosuccinate and sodium pentadecan-sulfonate (SPS) were employed in batch reactor at different combination ratios and concentration for vinyl chloride emulsion polymerization. Reaction performances were evaluated by monitoring conversion rate and molecular weight by K-value parameter. Particle size and its distribution were investigated as a criterion for particle nucleation and the growing process by calculating the number of latex particles and the average number of growing chains per particle, respectively. The final latexes were evaluated by means of the coarse matter content as a qualitative character of the latex. The results showed that the overall reaction rate increases by high amount of SPS. Also, by increasing SPS content in binary mixture, coarse particle formation decreased and latex stability and particle size distribution increased. Furthermore, it has been found that the particle size was nonlinearly dependent on the combined ratio and amount of emulsifier and has shown a minimum within the scope of the study.

中文翻译：

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高固含量VCM乳液聚合中阴离子双链磺酸盐乳化剂的二元混合物：乳化剂配比和浓度的影响

阴离子双链磺酸盐乳化剂、二异癸基磺基琥珀酸钠和十五烷磺酸钠（SPS）的二元混合物在间歇反应器中以不同的组合比和浓度用于氯乙烯乳液聚合。通过 K 值参数监测转化率和分子量来评估反应性能。通过分别计算乳胶颗粒的数量和每个颗粒的平均生长链数，研究了粒径及其分布作为颗粒成核和生长过程的标准。通过作为胶乳定性特征的粗物质含量来评价最终胶乳。结果表明，整体反应速率随着大量 SPS 的增加而增加。此外，通过增加二元混合物中的 SPS 含量，粗颗粒形成减少，胶乳稳定性和粒度分布增加。此外，已经发现粒度与乳化剂的组合比例和数量呈非线性关系，并且在研究范围内显示出最小值。