CAJ | 학술논문

以苯乙烯（St）为单体、十二烷基硫酸钠（SDS）为乳化剂、过硫酸钾（KPS）为引发剂，重点研究了该乳液聚合体系中乳化剂浓度（[S]）对胶束成核和沉淀成核的影响规律。结果表明，当 SDS 浓度高于 CMC 时（[S]≥8mmol/L），体系的成核以胶束成核为主；当[S]=2mmol/L 时，体系的成核以沉淀成核为主；当2mmol/L<[S]<8mmol/L时，体系同时以沉淀成核和胶束成核两种方式成核，且胶束成核所占的比例随着SDS浓度的增加而增大。研究了聚合反应过程中SDS浓度对单位体积水中乳胶粒个数（Np）的影响规律：当[S]≥8mmol/L时，Np∝[S]0.9；当[S]<8mmol/L时，Np∝[S]0.8。
이분을희（St）위단체、십이완기류산납（SDS）위유화제、과류산갑（KPS）위인발제，중점연구료해유액취합체계중유화제농도（[S]）대효속성핵화침정성핵적영향규률。결과표명，당 SDS 농도고우 CMC 시（[S]≥8mmol/L），체계적성핵이효속성핵위주；당[S]=2mmol/L 시，체계적성핵이침정성핵위주；당2mmol/L<[S]<8mmol/L시，체계동시이침정성핵화효속성핵량충방식성핵，차효속성핵소점적비례수착SDS농도적증가이증대。연구료취합반응과정중SDS농도대단위체적수중유효립개수（Np）적영향규률：당[S]≥8mmol/L시，Np∝[S]0.9；당[S]<8mmol/L시，Np∝[S]0.8。
Formulation of latex with styrene (St),potassium persulfate (KPS) and sodium dodecyl sulfate (SDS) was investigated as a function of SDS surfactant concentration [S] to explore its nucleation mechanism. The results showed that micellar nucleation dominated the nucleation process when the concentration of SDS was ≥ 8 mmol/L; while,precipitation nucleation dominated the process at 2mmol/L. From 2mmol/L to 8mmol/L,both micellar nucleation and precipitation worked;and the contribution of micellar nucleation increased with the increase of the concentration of SDS. Additionally,the particle number of latex was calculated:Np∝[S]0.9 when [S] was≥8mmol/L;Np∝[S]0.8 when 8mmol/L≥[S]≥2mmol/L.