丙酮-水-乙醇体系引发甲基丙烯酸甲酯在低密度聚乙烯表面的紫外光接枝  

THE PHOTOGRAFTING OF METHYL METHACRYLATE ONTO LOW-DENSITY POLYETHYLENE INITIATED BY ACETONE-WATER-ETHANOL SYSTEM

作　　者：王啸啸[1] 汪辉亮[1] 

机构地区：[1]北京师范大学化学学院,北京100875

出　　处：《北京师范大学学报（自然科学版）》2009年第1期57-61,共5页Journal of Beijing Normal University(Natural Science)

基　　金：国家自然科学基金资助项目(20574006)

摘　　要：脂肪酮在有水存在时具有较好的紫外接枝引发效果.对丙酮-水-乙醇为引发体系引发甲基丙烯酸甲酯(MMA)在低密度聚乙烯(LDPE)表面的紫外接枝反应进行了研究.讨论了丙酮浓度、水与乙醇体积比、单体浓度等对接枝的影响.在相同条件下,丙酮浓度为0.136 mol.L-1时聚乙烯表面接枝程度最高;MMA在聚乙烯表面的接枝量随着水含量的增加而明显增加,在水-乙醇体积比为1.5∶1时接枝程度最高;接枝量随着单体浓度的增加而增大,在单体浓度为1.88 mol.L-1时接枝速度最快.并对接枝产物进行了红外光谱和SEM表征.Aliphatic ketones can be effective photoinitiators for photografting in the presence of water. The photografting of methyl methacrylate （MMA） onto low-density polyethylene （LDPE） surface initiated by an acetone-water-ethanol system was studied. The effects of acetone concentration, water-ethanol volume ratio, monomer concentration on photografting reaction were examined. Under identical experimental conditions, highest grafting was obtained at an acetone concentration of 0. 136 mol·L^-1 ; grafting increased with increasing water content, with highest grafting obtained at a water-alcohol ratio of 1.5 ： 1; grafting also increased with increasing monomer concentration, with fastest grafting reaction obtained at a monomer concentration of 1.88 mol·L^-1. FTIR and SEM characterizations of grafted samples were carried out.

关 键 词：光接枝 光引发剂 聚乙烯 丙酮 

分 类 号：O632.52[理学—高分子化学] TQ325.12[理学—化学]