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首页> 外文期刊>Journal of Applied Polymer Science >Superabsorbent resin of acrylic acid/ammonium acrylate copolymers synthesized by ultraviolet photopolymerization
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Superabsorbent resin of acrylic acid/ammonium acrylate copolymers synthesized by ultraviolet photopolymerization

机译：紫外光聚合合成丙烯酸/丙烯酸铵共聚物的高吸水性树脂

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摘要

A new method of synthesizing a superabsorbent resin (SAR) from an acrylic acid/ammonium acrylate copolymer by direct UV photopolymerization was studied. The effects of the degree of neutralization of acrylic acid, the photoinitiators, the crosslinking agents, and the UV-Iight exposure time on the water absorbency (Q) were investigated. The results showed that Q of an SAR based on Irgacure 1700 or Irgacure 1800 and Irgacure 651 was high, reaching about 1200 mL/g, but under the same conditions, Q was low for an SAR based on other photoinitiators. The UV absorption spectrum proved that the photoinitiators matched the UV light source. Among the crosslinking agents, NN'-methylene bisacrylamide was more efficient than the others at a small concentration and a high value of Q. C-13-NMR spectrometry was used to identify the mechanism of the crosslinking reaction through the esterification of hydroxyethyl acrylate (HEA) and 2-hydroxypropyl acrylate with carboxylic acid group in acrylic acid/ammonium acrylate copolymerization, but the efficiency of the crosslinking reaction by esterification was lower than that of the copolymerization of vinyl groups in the crosslinking agent. Q of the acrylic acid/ammonium acrylate copolymer for the SAR reached 1255 mL/g under certain conditions (degree of neutralization of acrylic acid = 75%, Irgacure 651 concentration = 0.2 wt %, [HEA] = 0.2 wt %, exposure time = 10 min). (C) 2004 Wiley Periodicals, Inc.
机译：研究了一种直接紫外光聚合由丙烯酸/丙烯酸铵共聚物合成高吸收性树脂的新方法。研究了丙烯酸的中和度，光引发剂，交联剂和紫外线照射时间对吸水率（Q）的影响。结果表明，基于Irgacure 1700或Irgacure 1800和Irgacure 651的SAR的Q高，达到约1200 mL / g，但在相同条件下，基于其他光引发剂的SAR的Q低。紫外吸收光谱证明光引发剂与紫外光源匹配。在交联剂中，NN'-亚甲基双丙烯酰胺在低浓度和高Q值下比其他交联剂更有效.C-13-NMR光谱用于鉴定通过丙烯酸羟乙基酯的酯化反应的交联反应机理（在丙烯酸​​/丙烯酸铵共聚中，HEA）与具有羧酸基的丙烯酸2-羟丙酯共聚，但是通过酯化进行的交联反应的效率低于在交联剂中乙烯基的共聚的效率。在特定条件下（丙烯酸的中和度= 75％，Irgacure 651浓度= 0.2 wt％，[HEA] = 0.2 wt％，暴露时间=），用于SAR的丙烯酸/丙烯酸铵共聚物的Q达到1255 mL / g。 10分钟）。 （C）2004年Wiley Periodicals，Inc.

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