通过在聚合过程中后加一定量的乳化剂，制备出了具有二元分散粒径分布的乳液。研究了后加乳化剂的用量及加入时机对乳液粒径及粒径分布的影响，并用粒子表面乳化剂覆盖率阐述了实验结果。实验结果表明：通过改变后加乳化剂的用量和加入时机，可调节乳液的粒径及粒径分布 By adding a certain amount of emulsifier in the polymerization process, an emulsion with binary dispersed particle size distribution was prepared. The effects of the amount of emulsifier added and the timing of addition on the particle size and particle size distribution of the emulsion were investigated. The experimental results were described with the coverage of emulsifier on the particle surface. The experimental results show that the particle size and particle size distribution of the emulsion can be adjusted by changing the amount of emulsifier added and the timing of addition