摘要
利用聚丙烯酰氧乙基三甲基氯化铵(PDAC)作为分散稳定剂,阴离子单体丙烯酸(AA)、阳离子单体甲基丙烯酰氧乙基三甲基氯化铵(DMC)和非离子单体丙烯酰胺(AM)在硫酸铵水溶液中通过分散共聚合,制备了稳定分散在盐水中的聚合物微球。考察了无机盐浓度、分散剂用量对分散共聚合的影响。研究结果表明:体系内无机盐浓度的增加导致聚合物分子量降低;而随分散剂浓度的增加,微球粒径先减小后增加。制备的两性聚电解质溶液在等电点附近时,聚合物的特性黏度随盐浓度的增加而增加,显示明显的反聚电解质效应。
The polyampholyte microparticles were synthesized by dispersion polymerization in aqueous salts solution containing ammonium sulfate and sodium chloride, in which ionic monomer acrylic acid （AA）, cationic monomer 2（methacryloyloxy ethyl）trimethyl ammonium chloride（DMC） and noionic monomer acrylamide （Am） were employed as raw materials, the poly（acryloylxyethyl trimethyl ammonium chloride） （PDAC） were used as stabilizer. The effect of inorganic concentration and stabilizer concentration on the dispersion polymerization was investigated. The results suggested that the molecules moral mass of polymer decreased with the concentration of salt increased. And the particle size of microparticles reduced, and then increased with the increment of stabilizer concentration. The isoelectric point （IEP） was determined by Colloid Titration. At IEP, the intrinsic viscosity increased along with salt concentration increased, the higher viscosity was influenced by the virtue of antipolyelectrolyte.
出处
《化工新型材料》
CAS
CSCD
北大核心
2007年第11期40-41,51,共3页
New Chemical Materials
基金
国家自然科学基金(基金号20476102)资助项目
关键词
水介质
分散聚合
两性聚电解质
aqueous media, dispersion polymerization, polyampholyte
