作　　者： ; ; ; ; ; ;

机构地区： 仲恺农业技术学院化学化工学院绿色化工研究所

出　　处： 《化工学报》 2006年第11期2755-2760,共6页

摘　　要： 建立了丙烯酸系高吸水树脂耐候性的评价体系和研究方法,采用紫外线辐照法研究了N,N′-亚甲基双丙烯酰胺交联的丙烯酸/丙烯酰胺共聚物高吸水树脂的分解动力学行为.结果表明:丙烯酸系高吸水树脂的老化机理在于交联剂N,N′-亚甲基双丙烯酰胺在紫外线的作用下水解,导致树脂的交联结构解体.紫外线强度较低时,其分解速度受光反应控制;紫外线强度较高时,则受热反应控制.丙烯酰胺用量增加到70%(质量)、交联剂用量增加到0·139%(质量)、丙烯酸中和度增加到100%,树脂在相同条件下的失重率分别从100%、100%以及42·0%降低到0、9·3%和30·4%. The research method and evaluation system of the weather resistance of super absorbent resin based on acrylic acid were established, and the decomposition kinetics of such a super-absorbent resin were studied with ultra-violet irradiation. The results showed that the aging mechanism of such a superabsorbent resin was the hydrolysis of crosslinker N, N＇-methylenebisacrylamide hydrolyzed under ultraviolet light, leading to disassembly of the crosslinked structure. The decomposition rate was controlled by light reaction when the intensity of ultra-violet light was low but was controlled by hot reaction when the intensity of ultra violet light was high. When the dosage of acrylamide increased to 70%, the dosage of N,N＇-methylenebisacrylamide increased to 0. 139%, and the neutralization degree of acrylic acid increased to 100%, the loss of mass decreased from 100%, 100% and 42.0% to 0. 9.3% and 30.4%, respectively.

关 键 词： 高吸水树脂 耐候性 丙烯酸 亚甲基双丙烯酰胺

领　　域： [化学工程]