机构地区: 华南理工大学化学与化工学院化学工程研究所
出 处: 《涂料工业》 2006年第3期16-19,共4页
摘 要: 采用溶液聚合法合成高固体分丙烯酸树脂,用凝胶渗透色谱(GPC)法分析引发剂的种类和用量、反应温度及聚合工艺对丙烯酸树脂的相对分子质量及其分布的影响。结果表明,选用偶氮二异丁腈和过氧化苯甲酰两种引发剂进行复配可提高聚合物的相对分子质量;采用“饥饿态”聚合工艺进行聚合反应可有效控制聚合物的相对分子质量,且相对分子质量分布均匀,分散度小于2;当引发剂用量为2%,在110℃的反应条件下制得的丙烯酸树脂的综合性能优异,固含量超过70%,相对分子质量可达4万。 The title high solid acrylic resin is prepared by using solution polymerization process.The influence of varieties and amount of initiators,reaction temperature,and polymerization technology on molecular weigh and distribution of the acrylic resin is investigated by use of Gel Permeation Chromatography(GPC).It is shown that combination of azobisisobutyronitrile and benzoyl peroxide can increase the molecular weight of the polymer and 'Hunger' polymerization technology can effectively control the molecular weight of polymer with better distribution,less than 2.When the initiator is 2% and reacted at 110 ℃,the acrylic resin shows good all-round properties.If the solid is over 70%,molecular weight is up to 40 000.
领 域: [化学工程]