摘要
用混浊法和沸腾法分别研究了二叔丁基氮氧自由基(DTBNO)对丙烯腈(AN)及丙烯酸甲酯(MA)、甲基丙烯酸甲酯(MMA)自由基聚合的阻聚作用。结果表明,DTBNO对AN有较强的阻聚作用;DTBNO与对苯二酚(HQ)、苯醌(BQ)、二乙基羟胺(DEHA)等分别组成二元混合物时,其阻聚效果非常明显。当DTBNO-DEHA和DtBNO-HQ的浓度(ppm,下同)比分别为500:1000和1000:500时,对AN的阻聚效果最好;在二元混合阻聚剂中加入适量吩噻嗪(PT),其阻聚效果更佳,如DTBNO-DEHA-PT(500:500:500)在100℃时可使MMA完全终止聚合反应。
The high inhibition effect of di-tert-butyl nitroxide (DTBNO) on the free radical polymerization of acrylonitrile (AN), methyl acrylate (MA) and methyl methacrylate (MMA), initiated by benzoyl peroxide was studied . The results showed that DTBNO itself was an effective inhibitor for AN ,MA and MMA ,and the inhibition effect became more effective when DTBNO was used in combination with each of hydroquinone (HQ), 4 - tert - butyl catechol (TBC), 1,4-benzoquinone (BQ), diethylhydroxylamine (DEHA), etc. It was most effective when phenothiazine (PT)was added to these two components .
出处
《合成橡胶工业》
CAS
CSCD
北大核心
1991年第5期353-356,共4页
China Synthetic Rubber Industry
关键词
丙烯腈
丙烯酸甲酯
MMA
聚合
阻聚
inhibitor
di-tert- butyl nitroxide
acrylonitrile
methyl acrylate
methyl methacrylate
free radical polymerization
