复合型抗氧剂在ABS接枝共聚物中的稳定作用  

Effect of Compounded Antioxidants on Stabilization of ABS

作　　者：王娜[1] 索延辉[2] 孙志坚[2] 高春晶[2] 曹志臣[2] 张会轩[1,3] 

机构地区：[1]长春工业大学化学工程学院,吉林长春130012 [2]中油吉林石化公司合成树脂厂,吉林吉林132021 [3]中国科学院长春应用化学研究所,吉林长春130022

出　　处：《中国塑料》2008年第4期74-78,共5页China Plastics

摘　　要：采用乳液聚合方法制备丙烯腈-丁二烯-苯乙烯(ABS)接枝共聚物,将受阻酚类抗氧剂三甘醇双-3-(3-叔丁基-4-羟基-5-甲基苯基)丙酸酯(Irganox245)和β-(4-羟基-3,5-二叔丁基苯基)丙酸正十八碳醇酯(Irganox1076)与硫酯类抗氧剂硫代二丙酸二月桂酯(DLTP)及其复配后的抗氧剂以乳液的形式加到 ABS 胶乳中。通过测定粉料的老化变黄时间、热失重率、老化后的 ABS 树脂的黄色指数的变化等方法对单组分抗氧剂和复配抗氧剂在 ABS 中的稳定作用进行了研究。结果表明:Irganox245和 DLTP 复配后产生强协同效应,而 Irganox1076和DLTP 复配后的抗氧化效果和 Irganox1076单独使用时的效果相当,只产生比较弱的协同作用。同时也证实了 ABS的降解始于双键的断裂,然后与氧结合生成烷氧基化合物、过氧化物和羰基化合物。Hindered phenolic antioxidants triethylene glycol bis-3 （3-tert-butyl-4-hydroxy-5-methyl phenyl） propionate （ lrganox245 ） and n-octadecyl-β-（4-hydroxy-3, 5-di-tert-butyl-phenyl ） propionate （lrganox1076） were separately compounded with sulfur-containing antioxidant dilauryl thiodipropionate （DLTP）. The compounded antioxidants were introduced as emulsions into acrylonitrile-butadienestyrene （ABS） emulsion. The stabilization effect of the antioxidants was studied by determining the aging time of yellow, thermal weight loss rate, and yellowness index. It showed that a strong synergistic effect was exhibited by the compounded antioxidant of lrganox245 and DLTP, however, no synergistic effect was observed for Irganox1076 and DLTP. Through the investigation, it was confirmed that the degradation of ABS began with the destruction of double bonds followed by the formation of hydroperoxides, carbonyl, and alkyloxy compounds.

关 键 词：丙烯腈-丁二烯-苯乙烯共聚物 抗氧剂 协同作用 热氧降解机理 

分 类 号：TQ325.2[化学工程—合成树脂塑料工业]