分子质量调节剂对苯丙微乳液性能的影响  

Effect of Molecular Weight Regulator on the Properties of Styrene Butyl-acrylate Emulsion

作　　者：樊慧明[1] 马雅琦[1] 刘建安[1] 王建高[1] 

机构地区：[1]华南理工大学制浆造纸工程国家重点实验室,华南理工大学造纸与污染控制国家工程研究中心,广东广州510640

出　　处：《中国造纸学报》2010年第4期31-35,共5页Transactions of China Pulp and Paper

摘　　要：选用十二烷基硫醇作为分子质量调节剂合成了苯丙微乳液表面施胶剂,保持其他合成因素和操作条件不变,通过改变分子质量调节剂的用量,探讨调节剂对苯丙微乳液性能和纸张表面施胶效果的影响。实验结果表明,调节剂的用量对苯丙微乳液的稳定性能有较大影响,当调节剂用量超过0.6%（占总单体质量）或低于0.2%时,乳液的凝胶量显著增加。当调节剂的用量为0.2%-0.4%时,所得乳液对纸张施胶后的抗水性最好,其正/反面Cobb值从103.4/110.1 g/m2降至29.2/30.6 g/m2,这时聚合物的质均相对分子质量Mw=129896,分散系数接近1.0。调节剂用量对苯丙微乳液黏度、施胶纸张的强度及光学性能的影响不明显。The dosage of molecular weight regulator controls the molecular weight distribution.Meanwhile,the molecular weight affects physical and chemical properties of the polymer significantly.This paper chose TDDM,as molecular weight regulator,to synthesize styrene butyl-acrylate emulsion used for surface sizing agent.The properties of styrene butyl-acrylate emulsion and its paper surface sizing performance with the change of the dosage of molecular weight regulator were studied.The results showed that the different dosage of molecular weight regulator has great influence on the emulsion stability,and the amount of gel increases significantly when the dosage is more than 0.6%,or less than 0.2% on monomer dosage.Furthermore,when the regulator dosage is in the range of 0.2% to 0.4%,the water-resistance of the paper surface sized with the emulsion is the best,the Cobb value reduces from 103.4/110.1 g/m^2 to 29.2/31.6 g/m^2.The relative molecular weight of the polymer is 129896,and the dispersion coefficient is almost 1.0.

关 键 词：分子质量调节剂 苯丙乳液 表面施胶 

分 类 号：TS727.5[轻工技术与工程—制浆造纸工程]