硫酸铵水溶液中分散聚合法制备两性共聚物P(AM-co-AA-co-DAC-co-DMC)  

PREPARATION OF AMPHOTERIC COPOLYMER P(AM-co-AA-co-DAC-co-DMC) BY DISPERSION POLYMERIZATION IN AMMONIUM SULFATE AQUEOUS SOLUTIONS

作　　者：沈忠[1] 连虹艳[1] 周艺峰[1] 聂王焰[1] 

机构地区：[1]安徽大学化学化工学院安徽省绿色高分子材料重点实验室,合肥230039

出　　处：《高分子学报》2010年第5期530-535,共6页Acta Polymerica Sinica

基　　金：安徽省人才培养及科研带头人专项资金资助

摘　　要：利用分散聚合技术,在硫酸铵水溶液中以丙烯酰胺(AM)、丙烯酸(AA)、丙烯酰氧乙基三甲基氯化铵(DAC)、甲基丙烯酰氧乙基三甲基氯化铵(DMC)为单体,合成了两性共聚物P(AM-co-AA-co-DAC-co-DMC).用FTIR,13C-NMR,TEM等方法表征了聚合物的结构和组成.考察了不同分散稳定剂、正负离子单体配比和pH对分散聚合的影响,并对P(AM-co-AA-co-DAC-co-DMC)水基分散聚合条件及稳定性进行了一些探讨.实验表明,在硫酸铵水溶液中制得较稳定的P(AM-co-AA-co-DAC-co-DMC)分散体系,应选用非离子型或阳离子型的分散稳定剂,如聚乙烯吡咯烷酮(PVP)、聚甲基丙烯酰氧乙基三甲基氯化铵(PDMC)、聚丙烯酰氧乙基三甲基氯化铵(PDAC),而其pH应在2到4之间.当选用占总质量1.5%的聚乙烯吡咯烷酮(PVP)为分散稳定剂,引发温度为40℃,正负离子单体物质的量比值大于1,pH=3时,可以制得总离子度超过25%的纳米级两性聚合物.The amphoteric copolymer P （ AM-co-AA-co-DAC-co-DMC ） was synthesized by dispersion polymerizationin in ammonium sulfate aqueous solutions,in which noionic monomer acrylamide （AM）,anionic monomer acrylic acid （ AA）,cationic monomer acryloyloxyethyltrimethyl ammonium chloride （ DAC ） and cationic monomer methacryloyloxyethyltrimethyl ammonium chloride （ DMC） were used as raw materials. The characteristics of copolymers were studied by means of FTIR,13↑ C-NMR,transmission electron microscopy （TEM） and other methods. The effects of different dispersants,the molar ratio of anionic monomer to cationic monomer and pH on the dispersion polymerization process and the stability of the dispersion system were investigated. The results showed that when the amphoteric copolymer P （ AM-co-AA-co-DAC-co-DMC） was synthesized in the ammonium sulfate aqueous solution,to obtain a relatively stable dispersion system,it should choose to use non-ionic dispersion stabilizer or cationic dispersion stabilizer as polymeric stabilizer,such as polyvinylpyrrolidone （ PVP）,poly （ methacryloyloxyethyltrimethyl ammonium chloride） （ PDMC） and poly-（acryloylxyethyltrimethyl ammonium chloride）（PDAC） should be used,and its pH should be between 2 and 4. Amphoteric nano-copolymers with more than 25% total ion exponent can be obtained under the following optimized conditions：a mass fraction of polymeric stabilizer polyvinylpyrrolidone （PVP） is 1. 5% ,an initiation temperature is 40℃ ,pH = 3,the molar ratio of ionic monomer to cationic monomer is less than 1.

关 键 词：水基分散聚合 两性共聚物 丙烯酰胺 分散剂 

分 类 号：TQ314.253[化学工程—高聚物工业]