丙烯酸系高分子分散剂的合成及在水分散粒剂中的应用  

Synthesis of Acrylic Polymer Dispersant and Application in Water Dispersible Granule

作　　者：卢翼君 任天瑞[1] 

机构地区：[1]上海师范大学生命与环境科学学院化学系,上海200234

出　　处：《农药科学与管理》2014年第7期22-27,共6页Pesticide Science and Administration

基　　金：国家自然科学基金资助项目(编号:21172147);国家高技术研究发展计划(863)基金资助项目(编号:2006AA100204);上海市科委基金资助项目(编号:11ZR1426800)

摘　　要：以丙烯酸、马来酸酐和甲基丙烯酸酯(甲基丙烯酸甲酯、甲基丙烯酸乙酯和甲基丙烯酸正丁酯)为单体合成了三元共聚物分散剂,经红外与核磁确定其结构,用表面张力法测定临界胶束浓度(cmc)。以烯酰吗啉80%水分散粒剂(Water dispersible granule,WG)为应用实例,研究了不同结构的分散剂添加量对烯酰吗啉80%水分散粒剂悬浮率的影响,并通过测定崩解分散后悬浮液的Zeta电势和SEM图探究了不同单体类型分散剂性能差异的原因。随着分散剂用量增加,悬浮液的悬浮率和Zeta数值增大,悬浮体系中原药粒子粒径越小,当分散剂用量为4%时,悬浮率即可达到95.1%。The copolymer dispersants were synthesized with acrylic acid, maleic anhydride, and methacrylate （methyl methacrylate, ethyl methacrylate and butyl methacrylate） as monomers. The structure of dispersants was confirmed by 1H-NMR and FT-IR, and the critical micelle concentration tension was determined by testing surface tension. By taking dimethomorph 80% WG as an example, the influence of dispersant dosage and structure on suspension rate was as- sessed. By measuring the Zeta potential and SEM of the suspension, the reason was analyzed why different types of dispersants have different performances. The results showed that suspension rate, zeta potential roseand the particle size of pesticide decreased with the increase of dispersant dosage. The suspension rate reached maximum 91.5% when the dispersant dosage was 4%, and the suspension system appeared stable.

关 键 词：共聚物分散剂 水分散粒剂 悬浮率 Zeta电势 

分 类 号：TQ450.4[化学工程—农药化工]