【摘要】 采用正交实验和单因素实验,分析制备聚丙烯酸钠/淀粉复合糊料的影响因素:淀粉与AA质量比、丙烯酸中和度、引发剂用量(%,占丙烯酸质量分数)、交联剂用量(%,占丙烯酸质量分数)和反应温度(℃)。通过测定原糊的粘度、PVI,并对产物进行红外线光谱测试,以确定最佳工艺。通过正交实验得出,单体配比、中和度和引发剂这3个因素对复合糊料性能的影响较大,通过单因素实验对单体配比、中和度、引发剂用量进行测试分析,结果表明:淀粉∶AA=1∶9,中和度80%,引发剂0.15%(对单体总量),交联剂0.4%(占丙烯酸质量分数),反应温度为80℃时,合成糊料性能相对最好。更多还原

【Abstract】 This paper analyzes factors influencing the preparation of sodium polyacrylate/starch composite thickener with orthogonal test and single factor experiment,including mass ratio of starch and AA,neutralization of acrylic acid,initiator dosage(%,mass fraction in acrylic acid),cross-linking agent(%,mass fraction in acrylic acid)and reaction temperature(℃),and determines the optimal process by testing viscosity and PVI of the original thickener and conducting infrared spectroscopy test.The orthogonal experiment shows that monomer ratio,neutralization and initiator have great influence on properties of composite thickener.The result of test and analysis on monomer ratio,neutralization and initiator dosage in single factor experiment shows that composite thickener has better properties under such conditions as starch:AA=1∶9,neutralization 80%,initiator dosage 0.15%(to total amount of monomers),cross-linking agent dosage 0.4%(mass fraction in acrylic acid)and reaction temperature 80℃.更多还原