论文部分内容阅读
在双水相中进行淀粉接枝丙烯酰胺共聚反应是一种新的聚合方法,对以聚乙二醇为分散介质、高锰酸钾为引发剂的双水相中淀粉接枝丙烯酰胺共聚反应进行了研究,考察了引发时间、引发剂浓度及配比对产品单体转化率、接枝率和接枝效率的影响。通过实验得到聚合反应的最佳工艺条件:引发时间为10 min,n(高锰酸钾)∶n(丙烯酰胺)=3.0×10-4∶1,n(高锰酸钾)∶n(H+)=1∶10,反应温度为50℃,反应时间7 h,此时得到的产品的单体转化率C为98.88%,接枝率G为144.53%,接枝效率GE为97.81%。最后通过红外光谱仪进行结构表征。
The graft copolymerization of acrylamide onto starch in aqueous two-phase is a new polymerization method. The graft copolymerization of starch with acrylamide in aqueous two-phase system using polyethylene glycol as the dispersion medium and potassium permanganate as initiator The effects of priming time, initiator concentration and ratio on the monomer conversion, grafting rate and grafting efficiency were studied. The optimum conditions of the polymerization reaction were obtained through experiments: the priming time was 10 min, n (potassium permanganate): n (acrylamide) = 3.0 × 10-4:1, n (potassium permanganate) ) = 1:10, the reaction temperature was 50 ℃ and the reaction time was 7 h. At this time, the monomer conversion rate C of the obtained product was 98.88%, the graft ratio G was 144.53% and the graft efficiency GE was 97.81%. Finally, the structure was characterized by infrared spectroscopy.