氧化还原引发体系下Poly（AA—AANa—AM）吸水性树脂的合成与表征.pdfVIP

弟 15巷弟 4别 连 巩 q．／J 付 干 似 学兔兔 2012年8月 JOuRNAL 0F BUILDING MATERIAI S Aug．，2012 文章编号：1007—9629(2012)04—0494—04 氧化还原引发体系下Poly(AA—AANa—AM) 吸水性树脂的合成与表征 宋学锋， 张 丹， 何廷树 (iN安建筑科技大学材料科学与工程学院，陕西西安710055) 摘要：基于原位合成吸水性树脂处理混凝土微裂缝渗漏这一特殊应用技术，研究了氧化还原引发 剂引发 AA—AANa—AM的聚合反应速率及合成的 Poly(AA—AANa—AM)吸水性树脂经受干湿循环 后的吸水膨胀倍率和吸水膨胀速率．结果表明：过硫酸铵一亚硫酸氢钠和四甲基乙二胺一过硫酸铵 2 种氧化还原引发体系均可实现室温原位合成Poly(AA—AANa—AM)吸水性树脂，而四甲基乙二胺一 过硫酸铵氧化还原引发体系引发 AA—AANa—AM 聚合反应的诱导期可控；合成的 Poly(AA—AA— Na—AM)吸水性树脂随干湿循环次数增加，其平衡吸水膨胀倍率和吸水膨胀速率均呈下降趋势． 关键词：氧化还原引发体系；吸水性树脂；聚合速率；干湿循环 中图分类号：TU528．0l 文献标志码：A doi：10．3969／j．issn．1007—9629．20l2．04．011 Synthesis and Characterizati0n Of Water Absorbent Resin of Poly(AA—AANa—AM)with Redox Initiation System SONG Xue—feng， ZHANG Dan， HE Ting—shu (School of Materials ScienceEngineering，Xi’an University of ArchitectureTechnology，Xi’an 710055，China) Abstract：Based on the special usage of water absorbent resin synthesized in situ in the leakage treatment of construction．the polymerization rate of AA—AANa—AM with redox initiation systems and the swelling ratio and swelling rate of Poly(AA—AANa—AM)subjected to wet—dry cycles were studied．The results show that the water absorbent resin of Poly(AA—AANa—AM)can be synthesized in situ at ambient temper— ature using the redox initiation system of(NH4)2 S2 08-NaHS()3 or(CH3)2 N (CH2)2 N (CH 3)2一 (N H 4)2 S2 O8，respectively，while the induction period of the polymerization of AA—AANa—AM with the (CH3)2N(CH2)2N(CH3)2一(NH4)2S2O8 is controllable；the swelling ratio and the swelling rate of the Poly (AA—AANa—AM)tends to be f