邻苯二甲酸二丁酯的辐射效应研究

THE RADIATION DEGRADATION OF DIBUTYL-O-PHTHALATE

研究了在室温下 ,空气或氮气条件下γ射线对邻苯二甲酸二丁酯的辐射效应。通过GC、GC/MS和PGC/MS等手段对辐解产物的分析表明 ,邻苯二甲酸二丁酯在γ射线辐照下发生了严重的降解反应。不仅生成H2 、CH4 、CO2 和C2 H4 等一般性气体产物 ,而且有H2 O、甲酸、烯丙醇、丁醇、丁醛和邻苯二甲酸酐等羟基或羰基化合物 ,此外还发现了 3-甲基苯并呋喃和 3-甲基苯并二氢呋喃两种特别产物。气氛中O2 的含量对H2 和CO2 的生成有重要影响 ,而对CH4 的生成影响很弱。这 3种气体产物的量均随辐射剂量的增加而增大 ,且CH4 浓度与剂量基本呈线性关系递增。根据分析实验提供的辐解产物信息和有机物辐射化学反应的一般原理 ,对邻苯二甲酸二丁酯辐射降解反应机理作了一定的探讨。

Dibutyl-o-phthalate(DBP) was irradiated with γ ray sealed in air or nitrogen at ambient temperture. The radiolysis products were analyzed by means of GC, GC/MS and PGC/MS,etc. Serious radiation degradation of DBP was showed. Not only general products such as hydrogen,methane, carbon dioxide and ethylene etc were examined,but also hydroxy or carbonyl compounds such as water,formic acid, allyl acohol,butyl alcohol,butyl aldehyde and phthalic anhydride etc were detected,two novel products 3-methyl benzofran and 3-methyl-dihydro-benzofran were found also. Remarkable effects of oxygen in ambience on formation of products hydrogen and carbon dioxide, but little effect on methane, were observed. The content of these three gaseous products all increased with dose,there was basiclly a linear relationship between the concentration of methane and dose. The radical reaction mechanism of dibutyl-o-phthalate radiation degradation was discussed.