摘要
以(NH4)2S2O8-Na2SO3为氧化还原引发剂,通过非离子单体丙烯酰胺(AM)与阳离子单体2-甲基丙烯酰氧乙基三甲基氯化铵(DMC)在柠檬酸钾溶液中的沉淀聚合,制备了阳离子聚电解质聚(2-甲基丙烯酰氧乙基三甲基氯化铵-丙烯酰胺)[P(DMC-AM)]。利用溶解度参数原理,得知聚合物[P(DMC-AM)]在柠檬酸钾溶液中的溶解量远小于单体的溶解量,同时探讨了聚合物[P(DMC-AM)]在柠檬酸钾溶液中沉淀分离的机理。通过考察单体总转化率的影响因素,得到最佳的反应条件:柠檬酸钾质量分数57%,m((NH4)2S2O8)∶m(Na2SO3)=1∶1,引发剂总质量分数0.10%,单体总质量分数3%,单体配比m(DMC)∶m(AM)=3∶1,反应温度50℃,反应时间2h。在此条件下,DMC和AM的总转化率为86.4%。通过红外光谱分析验证,所得聚合物为[P(DMC-AM)]。
Copolymer, poly （ acrylamide-2-methyl acryloyloxyethyl trimethyl ammonium chloride ） [P（DMC-AM）] was synthesized from acrylamide （AM）and cationic comonomer 2-methyl acryloyloxyethyl trimethyl ammonium chloride （DMC）by precipitation polymerization in an aqueous solution of potassium citrate using ammonium persulfate （ （ NH4 ） 2S2O8 ） and sodium sulfite（ Na2SO3 ） as initiators. The product was a water-soluble cationic polyelectrolyte, and could be used as flocculant, antiseptic and etc. Solubilities of DMC ,AM and P（DMC-AM） in aqueous solution of potassium citrate were measured by means of theory of solubility parameter. Solubilities of DMC and AM were much higher than that of P（ DMC-AM）. Mechanism of copolymer precipitation in the solution was discussed. The factors influencing conversion of comonomers, namely mass fraction of potassium citrate, polymerization temperature, total mass fraction of monomers, and total mass fraction of initiators were investigated. Under optimal conditions： mass fraction of potassium citrate 57%, m（（NH4）2S2O8） ： m（Na2SO3） = 1 ： 1, total mass fraction of initiators 0. 10%, total mass fraction of monomers 3%, m（DMC） ： m （AM） =3 ： 1, polymerization temperature 50 ℃, and reaction time 2 h, total conversion of DMC and AM could reached 86.4%. P（DMC-AM） was qualitatively analyzed by IR,
出处
《石油化工》
EI
CAS
CSCD
北大核心
2006年第2期151-155,共5页
Petrochemical Technology
基金
河北省自然科学基金项目(203013)
河北省普通高等学校博士科研资助基金项目(B2002204)
关键词
柠檬酸钾溶液
沉淀聚合
丙烯酰胺
2-甲基丙烯酰氧乙基三甲基氯化铵
引发剂
potassium citrate solution
precipitation polymerization
acrylamide
2-methyl acryloyloxyethyl trimethyl ammonium chloride
initiator
