MBHD共聚物乳液的电解质稳定性

ELECTROLYTE STABILITY OF THE MBHD COPOLYMER LATEX

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 用量与共聚物乳液电解质稳定性的相互关系． ＨＥＭＡ 的引入可明显提高共聚物乳液的电解质稳定性， ＨＥＭＡ 和ＤＭＡＥＭＡ

The MBHD copolymer latex with hydroxyl methacrylate(HEMA) and dimethylamino ethyl methacrylate (DMAEMA) is synthesized. The effects of the feed policy of the emulsified monomers, polymerization temperature, the weight ratio of the non ionic to anionic emulsifier, the emulsifier content, and the content of the HEMA and DMAEMA on the electrolyte stability of the latex are investigated. The results show that a higher content of the HEMA, DMAEMA, and the emulsifiers is favorable for the electrolyte stability of the latex. The introduction of the monomer HEMA may improve the electrolyte stability of the copolymer latex because of the higher hydrophilicity of the particles. Raising polymerization temperature is also beneficial to the electrolyte stability of the latex due to the fact that bigger particles are formed. The electrolyte stability of the latex prepared by batch process is worse than that prepared by semi continuous process.