MBHD四元共聚物乳液的合成与表征

合成了含有甲基丙烯酸羟乙酯（ＨＥＭＡ）和甲基丙烯酸二甲氨基乙酯（ＤＭＡＥＭＡ）的四元共聚物乳液（ＭＢＨＤ乳液），研究了乳化单体加入方式、聚合温度、非离子和阴离子乳化剂配比和用量及ＨＥＭＡ和ＤＭＡＥＭＡ用量对共聚物乳液的粒径及其分布、粘度和表面张力的影响。间歇聚合过程由于水相成核较多而使所得乳液的粒径较小，粒径分布较宽、乳液粘度和表面张力较大，官能团单体ＨＥＭＡ和ＤＭＡＥＭＡ用量增大使共聚物乳液的表

SYNTHESIS AND CHARACTERIZATION OF THE MBHD COPOLYMER LATEX

The MBHD copolymer latex with hydroxyl methacrylate(HEMA) and dimethylaminoethyl methacrylate(DMAEMA) was synthesized. The effect of the polymerization conditions and the recipes on the particle size, particle size distribution, viscosity, and the surface tension of the latex was investigated. The results indicate that the latex prepared by batch polymerization process has a smaller particle size, wider particle size distribution(PSD) because more new particle was formed. It also has a higher viscosity and surface tension. An increase in the content of the HEMA and DMAEMA results in the decrease of the surface tension of the latex but it has little effect on the viscosity of the latex. Raising the amount of the HEMA is beneficial to get a smaller particle size and narrower PSD of the latex while the amount of the DMAEMA has an opposite effect on that of the latex. The ratio of the amount of the non ionic to anionic emulsifier, the content of the emulsifiers and the polymerization temperature also has an influence on the properties of the latex prepared by semi continuous polymerization.