有机酸对丙烯酸聚氨酯体系反应速率的影响  

Effects of Organic Acids on the Reaction Speed of Acrylic Polyurethane

作　　者：马晓阳 杨兴亮 吴允铭 陈君华 黎家强 Ma Xiaoyang;Yang Xingliang;Wu Yunming;Chen Junhua;Li Jiaqiang(Qingyuan Hi-tech Huayuan Institute of Science and Technology Collaborative Innovation Co.,Ltd.,Qingyuan,Guangdong 511517,China;Zhaoqing University,Zhaoqing,Guangdong 526061,China)

机构地区：[1]清远高新华园科技协同创新研究院有限公司,广东清远511517 [2]肇庆学院,广东肇庆526061

出　　处：《涂料工业》2022年第8期9-13,共5页Paint & Coatings Industry

基　　金：清远市科技计划项目,汽车用高固低黏低VOC表面新材料的开发及其产业化(210816084561354)。

摘　　要：以羟基丙烯酸树脂和多异氰酸酯固化剂构成的丙烯酸聚氨酯体系为研究对象,研究了乙酸、丙酸、异辛酸和新癸酸的加入对体系凝胶时间的影响,并采用Flory凝胶化理论结合Arrhenius方程进行了分析。结果表明:引入少量有机酸即可大幅缩短丙烯酸聚氨酯体系的凝胶时间,当有机酸用量继续增大时,凝胶时间变化曲线趋于平缓。表观活化能和指前因子的计算结果表明,有机酸的加入对丙烯酸聚氨酯体系的表观活化能影响不显著,但是能够明显降低指前因子。对乙酸与二月桂酸二丁基锡(T12)对丙烯酸聚氨酯体系的协同催化作用的研究表明,在该体系中,有机酸与T12存在拮抗作用。The acrylic polyurethane system composed of hydroxy acrylic resin and polyisocyanate was used as the research object,the influence of the addition of acetic acid,propionic acid,isooctanoic acid and neodecanoic acid on the gel time of the system was studied.The results were analyzed through Flory theory and Arrhenius equation.The results showed that the introduction of a small amount of organic acid could greatly shorten the gel time of the acrylic polyurethane system.When the amount of organic acid continued to increase,the gel time curve tended to be flat.The calculation results of apparent activation energy and pre-exponential factor showed that the addition of organic acid had no significant effect on the apparent activation energy of acrylic polyurethane system,but could significantly reduce the pre-exponential factor.The synergistic catalytic effect of acetic acid and dibutyltin dilaurate on the acrylic polyurethane system was also investigated.

关 键 词：有机酸 聚氨酯 丙烯酸 活化能 指前因子 反应速率 凝胶 

分 类 号：TQ630.1[化学工程—精细化工]