摘要
用紫外线引发接枝,研究了苯乙烯在甲醇溶剂中对纤维素的接枝。探讨了在接枝体系中加入多功能团单体(多烯酯)以后,苯乙烯对纤维素接枝所发生的变化,并通过对多功能团单体、溶剂、辐照时间以及硫酸亚铁对接枝率的影响,选出提高接枝率的途径。结果表明,多功能团单体均能明显提高接枝率,其中以1,2,3-三羟甲基丙烷三丙烯酸酯为最佳。甲醇是理想的溶剂。随着溶剂分子量的增加,接枝产率逐步下降。
Grafting styrene to cellulose in methanol was studied with UV. Grafting efficiency was determined as a function of irradiation period, different polyfunctional monomers, various alcohols, post-irradiation and ferrous sulphate. It was found that polyfunctional monomers (trimethylol propane triacrylate, polyethylene glycol dimethacrylate, triethylene glycol dimethacrylate, polyethylene glycol diacryhte, tripropene glycol diacryhte) are novel additives for enhancing the grafting yield of styrene in methanol to cellulose.
关键词
接枝
苯乙烯
纤维素
紫外线
单体
graft
styrene
cellulose
ultraviolet
polyenic monomer
