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丙烯酸系高吸水树脂的紫外线分解动力学行为
引用本文:崔英德,黎新明,贾振宇,尹国强,廖列文,梁世强. 丙烯酸系高吸水树脂的紫外线分解动力学行为[J]. 化工学报, 2006, 57(11): 2755-2760
作者姓名:崔英德  黎新明  贾振宇  尹国强  廖列文  梁世强
作者单位:仲恺农业技术学院绿色化工研究所,广东,广州,510225;仲恺农业技术学院绿色化工研究所,广东,广州,510225;仲恺农业技术学院绿色化工研究所,广东,广州,510225;仲恺农业技术学院绿色化工研究所,广东,广州,510225;仲恺农业技术学院绿色化工研究所,广东,广州,510225;仲恺农业技术学院绿色化工研究所,广东,广州,510225
基金项目:国家自然科学基金 , 广东省自然科学基金
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%.

关 键 词:高吸水树脂  耐候性  丙烯酸  N  N′-亚甲基双丙烯酰胺
文章编号:0438-1157(2006)11-2755-06
收稿时间:2005-08-03
修稿时间:2005-08-032006-06-29

Decomposition kinetics of acrylic acid-based super-absorbent resin by ultraviolet
CUI Yingde,LI Xinming,JIA Zhenyu,YIN Guoqiang,LIAO Liewen,LIANG Shiqiang. Decomposition kinetics of acrylic acid-based super-absorbent resin by ultraviolet[J]. Journal of Chemical Industry and Engineering(China), 2006, 57(11): 2755-2760
Authors:CUI Yingde  LI Xinming  JIA Zhenyu  YIN Guoqiang  LIAO Liewen  LIANG Shiqiang
Affiliation:Institute of Green Chemical Engineering, Zhongkai University of Agriculture and Technology, Guangzhou 510225, Guangdong, China
Abstract: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 super-absorbent resin was the hydrolysis of crosslinker N,N′-methylenebisacrylamide hydrolyzed under ultra-violet 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.
Keywords:
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