化工新型材料

化工新型材料 ›› 2018, Vol. 46 ›› Issue (6) : 274-278.

开发与应用

N-异丙基丙烯酰胺共聚丙烯酸钠LCST调控及吸水性能研究

张素红, 陈航超, 刘生玉, 乔燕

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Study on the regulation of LCST of copolymer with N-isopropyl acrylamide and sodium polyacrylate and its water absorption

Zhang Suhong, Chen Hangchao, Liu Shengyu, Qiao Yan

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文章历史 +

Received		Published
2017-03-06		2018-07-03
Issue Date	Revised Date
2018-07-03	2017-03-06

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摘要

以N-异丙基丙烯酰胺和亲水性单体丙烯酸钠为原料,采用水溶液自由基共聚法制备了一系列N-异丙基丙烯酰胺基温敏吸水聚合物。利用傅里叶变换红外光谱仪和热重分析技术对所制样品的物理结构和性质进行表征,研究了不同丙烯酸钠单体摩尔比对聚合物临界溶解温度(LCST)、溶胀性和退胀性的影响,并研究其溶胀动力学。结果表明:通过实验成功制备出高分子共聚物,共聚物的热分解温度随着丙烯酸钠摩尔比的增加而降低;聚合物的LCST随着丙烯酸钠摩尔比增加而逐渐提高,但响应速率呈现逐渐降低的趋势;溶胀过程符合non-Fickon动力学方程。

Abstract

A series of water absorbent polymers were prepared using N-isopropyl acrylamide and sodium acrylate as raw materials by the free radical copolymerization in aqueous solution.The physical structure and property of obtained samples were characterized by FT-IR and TG.The effects of different proportion of sodium acrylate monomers on LCST,swelling,deswelling and swelling dynamics were studied.The results showed that the copolymers were successfully prepared and the thermal decomposition temperature decreased with the molar increase of sodium propionate proportion while LCST of polymer increased with the molar increase of sodium acrylate proportion.And thus the temperature responsive rate gradually decreased.The swelling process for copolymers was coincident with non-Fickon dynamics.

关键词

丙烯酸钠 / N-异丙基丙烯酰胺 / 共聚 / 吸水

Key words

sodium acrylate / N-isopropylacrylamide / copolymerization / water absorption

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N-异丙基丙烯酰胺共聚丙烯酸钠LCST调控及吸水性能研究[J]. 化工新型材料, 2018, 46(6): 274-278 DOI:

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