用次亚磷酸钠作为链转移剂合成聚丙烯酸钠的研究  

Synthesis of Sodium Polyacrylate Using Sodium Hypophosphite as Chain-transfer Agent

作　　者：李国定[1] 颜进华 李雁[1] 

机构地区：[1]华南农业大学食品学院,广东广州510642 [2]广东轻工职业技术学院,广东广州510300

出　　处：《造纸化学品》2011年第1期23-28,共6页Paper Chemicals

摘　　要：采用丙烯酸和丙烯酰胺作为单体,次亚磷酸钠作为链转移剂,过硫酸铵为引发剂,通过水相自由基聚合,获得适合于小粒径重质碳酸钙浆料分散用的聚丙烯酸钠。实验结果表明:引发剂用量、次亚磷酸钠用量、单体浓度和丙烯酰胺用量等反应条件均对分散剂的相对分子质量有较大影响。实验结果还表明:这种共聚物在结构上引入磷酸根基团,对小粒径重质碳酸钙颗粒起到很好的分散效果。In this paper,sodium polyacrylate that is competent for dispersing ground calcium carbonate with small particles is synthesized by free radical polymerization of acrylate and acrylamide in aqueous solution using sodium hypophosphite as chain transfer agent,ammonium persulfate as initiator.The results show that the reaction conditions,such as the concentrations of initiator,chain transfer agent and monomers,as well as acrylamide ratio, have significant effects on the molecular weight of the obtained dispersant.The introduction of phosphate group into the molecular chain of the dispersant can increase its dispersing effect on ground calcium carbonate with small particles.

关 键 词：次亚磷酸钠 重质碳酸钙 聚丙烯酸钠 

分 类 号：TS727.3[轻工技术与工程—制浆造纸工程]