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将丙烯酰胺(AM)、甲基丙烯酰氧乙基三甲基氯化铵(DMC)及带长链温敏基团的烯丙基聚氧乙烯醚(APEG)进行自由基共聚,制备出一种新型温敏性酸液稠化剂P(AM-DMC-APEG),并得到最佳合成条件:单体质量分数40%,单体摩尔比n(APEG)∶n(AM)∶n(DMC)=1∶20∶2,w(引发剂)=0.08%,聚合温度70℃,聚合时间3.5 h。采用红外光谱和静态光散射对P(AM-DMC-APEG)的结构与相对分子质量进行了表征;并对稠化剂的温敏性能和缓速性能作出评价。结果表明,该研究所合成的稠化剂P(AM-DMC-APEG)的温敏性能稳定,并具有良好的缓速效果。
Radical copolymerization of acrylamide (AM), methacryloyloxyethyltrimethylammonium chloride (DMC) and allyl polyoxyethylene ether (APEG) with long chain temperature-sensitive groups to prepare a novel Temperature-sensitive acid thickener P (AM-DMC-APEG), and the best synthesis conditions were obtained: 40% monomer concentration, monomer molar ratio n 1:20: 2, w (initiator) = 0.08%, polymerization temperature 70 ℃, polymerization time 3.5 h. The structure and relative molecular mass of P (AM-DMC-APEG) were characterized by FTIR and static light scattering. The thermal sensitivity and retarding properties of thickener were also evaluated. The results showed that the thickener P (AM-DMC-APEG) synthesized in this study has stable temperature-sensitive property and good retarding effect.