影响苯丙乳液黏度与粒径的因素分析

采用种子乳液聚合法，以苯乙烯、丙烯酸丁酯、丙烯酸异辛酯、甲基丙烯酸甲酯等为主要原料合成了用于制备胶粘剂的苯丙乳液。重点研究了引发剂、乳化剂及种子单体的用量及硬软单体不同配比对苯丙乳波黏度和粒径的影响。实验结果表明，当引发剂用量为0.5％（占单体总质量，后同）、乳化剂用量为1％、种子单体用量为8％、硬软单体配比为30／46的条件下，合成的笨丙乳液黏度较高、粒径小、粒度分布宽，用该乳液制备的胶粘剂具有优良的施工性能.

Study on influence factors for viscosity and particle size of styrene-acrylate emulsion

A kind of styrene-acrylate emulsion for preparation of adhesive was synthesized by seed emulsion polymerization method. The main monomers were styrene, butyl acrylate, 2-ethyl- hexyl acrylate and methyl methacrylate. The effects that influence viscosity and particle size of styrene-acrylate emulsion including initiator content,emulsifier content,seed monomer content and the ratio of hard monomer to soft monomer were mainly discussed. The results showed that when the content of initiator, emulsifier and seed monomer was 0.5%（mass fraction based on the whole monomer, the same after）, 1%, and 8% respectively, and the weight ratio of hard monomer to soft monomer was 30/46, the styrene-acrylate emulsion with higher viscosity,smaller particle size and wider grain distribution was prepared.The adhesive based on the styrene-acrylate emulsion has good workability.