应用化学2012，Vol.29Issue(9)：1046-1052,7.DOI:10.3724/SP.J.1095.2012.00429
苯乙烯-马来酸酐共聚物对20％除虫脲悬浮剂分散稳定性的影响
Effect of Styrene-Maleic Anhydride Copolymer on the Dispersibility of 20％ Diflubenzuron Suspension Concentrate
摘要
Abstract
With benzoyl peroxide as initiator, a series of stysene-maleic anhydride copolymer was prepared by solution copolymerization under different temperatures. Polystyrene-maleic anhydride sulfonic acid sodium (SSMA) with different relative molecular mass was obtained by sulfonated the polystyrene-maleic anhdride. The dispersibility of 20% diflubenzuron suspension concentrate was identified by assaying and analyzing the diameter of particles, Zeta potentials and viscosities. The results showed that the optimal dispersant was SSMA, which was prepared at 75℃ , and the most suitable concentration was 3% . At pH =9, the dispersion stability of suspension concentrate was the best due to the strong steric hindrance provided by completely ionizing of the molecules. Na+ or Ca2+ was able to decrease the absolute value of Zeta potential by compressing the electronic double layer thickness of particles surface, which could lead to particles aggregation due to the reduction of electric quantity and ultimately deteriorate the dispersive effect of suspension concentrate. If the ions concentration were the same, the coagulation capacity by Ca2 + was stronger than that of Na+ , and the dispersion stability of suspension was worse after adding Ca2 +.关键词
苯乙烯-马来酸酐共聚物/除虫脲/悬浮剂/分散稳定性Key words
styrene-maleic anhydride copolymer, diflubenzuron, suspension concentrate, dispersibility分类
化学化工引用本文复制引用
孙停停,张树芹,路福绥,陈甜甜..苯乙烯-马来酸酐共聚物对20％除虫脲悬浮剂分散稳定性的影响[J].应用化学,2012,29(9):1046-1052,7.基金项目
山东省自然科学基金(ZR2009DM032)、山东省博士基金(2008BS07016)以及山东农业大学青年创新基金(23621)资助项目 （ZR2009DM032）
