聚合助剂及活性单体对聚丙烯酸酯粘合剂应用性能的影响

The effects of polymerizing additives and reactive monomers on application properties of polyacrylate binder

采用乳液聚合技术,以丙烯酸甲酯(MA)、丙烯酸乙酯(EA)、丙烯酸丁酯(BA)和苯乙烯(St)为基本聚合单体,丙烯酸(AA)、N-羟甲基丙烯酰胺(NMA)为活性单体,十二烷基硫酸钠(SDS)、复合脂肪醇聚氧乙烯醚(复合AEO)为乳化剂,过硫酸铵(APS)为引发剂,制备了5组聚丙烯酸酯粘合剂。研究了乳化剂、引发剂、活性单体对单体转化率及粘合剂的黏合性、耐沾污性、高温泛黄性和耐水性等应用性能的影响。研究结果表明:乳化剂及活性单体的配比与用量、引发剂的用量对丙烯酸酯单体的乳液聚合反应及其应用性能具有重要影响。

Five groups of polyacrylate binders were prepared with emulsion polymerization technique. Methyl acrylate （MA）, ethyl acrylate （EA）, butyl acrylate （BA） and styrene （St） were employed as basic polymerizing monomers; acrylic acid （AA） and N-methylol acrylamide （NMA） as reactive monomers; sodium dodecylsulfate （SDS）, composite fatty alcohol ether polyethylene oxide （composite AEO） as emulsifier and ammonium persulfate （APS） as initiator. The charge ratio and dosage of emulsifiers/reactive monomers and dosage of initiator were changed for their effects on the reaction conversion rate and adhesivity, staining resistance, yellowing resistance and water tolerance of binders. The study showed that the polymerization reaction of monomers and properties of binder were distinctly interrelated with the charge ratio and dosage of emulsifiers or reactive monomers and the dosage of initiator.