梳形大分子乳液合成及特性黏数的影响因素研究

Synthesis of Comb-Like Macromolecular Emulsion and Influence Factors of Intrinsic Viscosity

何 柳 何志祥 张 伟

HE Liu HE ZHi-Xiang ZHANG Wei

将10-羟基葵酸与氯丙烯反应得到具有长亲水链结构的新型功能单体B。利用反相乳液聚合法，将癸烷、乳化剂、丙烯酸、丙烯酰胺和单体B混合，以偶氮二异丁腈的盐酸盐为引发剂，合成梳形大分子聚合物乳液comb。研究了pH值，AM、AA、单体B、引发剂加量，单体总质量分数，聚合温度和反应时间对comb特性黏数的影响，并通过正交实验确定了高特性黏数梳形大分子乳液的最优合成条件：反应温度40℃，pH值7，单体总质量分数40%，AA、单体B和引发剂分别占单体总质量的20%、5%和0.15%，反应时间6 h。在最佳聚合条件下合成的comb有效含量30%，特性黏数22.9 dL/g。

A new functional monomer B with hydrophilic long-chain structure was formed by 10-hydroxy decanoate acid and allyl chloride. By reversed-phase emulsion polymerization method, taking azobisisobutyronitrile hydrochloride as initiator, decane, emulsifiers, acrylic acid, acrylamide and monomer B were mixed to develop a macromolecular polymer emulsion (comb). The effect of experiment factors such as pH value, the dosage of AM, AA, monomer B and initiator, the total mass fraction of monomer, polymerization temperature and reaction time on the intrinsic viscosity of polymer was studied. The optimum synthesis condition of comb macromolecular emulsion with high characteristic viscosity through orthogonal experiment was obtained as follows: 40℃ initiation temperature, 7 pH value, 40% total mass fraction of monomer, AA, monomer B and initiator accounted for 20%, 5% and 0.15% of monomer total mass respectively, 6 h reaction time. Under optimum polymerization condition, the effective content of comb was 30% and the intrinsic viscosity was 22.9 dL/g.