以丙烯酸为原料,使用紫外光引发聚合制备了自交联聚丙烯酸吸水树脂(PAAsc)。采用IR、1 H NMR、SEM等方法对树脂的结构进行表征。研究不同功率的紫外光源、辐照距离及反应温度对该树脂吸液率的影响。结果表明,紫外灯功率为1000 W、聚合温度在15℃、光辐照时间为40 min、辐照距离为15 cm时,所制备吸水树脂的吸液率最佳,吸去离子水率为4391 g/g,吸盐水率为206 g/g。同时,在加压条件下进行了不同保水剂吸液率的比较。
A self-crosslinking polyacrylic acid superabsorbent was prepared with acrylic acid as raw materials by UV polymerization.The samples were further characterized by means of FT-IR,1 H NMR and SEM.The effects of preparation conditions such as power of ultraviolet light source,irradiation distance and the polymeri-zation temperature on the absorbency were evaluated.The results show that:power the UV lamp was 1 000 W, the polymerization temperature was 1 5 ℃,the light irradiation time was 40 min,and irradiation distance is 1 5 cm.Results show that absorbencies of the resin which is polymerized under the optimum condition are as fol-lows:the deionized water absorbency was 4 391 g/g,the saline water (m(NaCl)=0.9%)absorbency was 206 g/g.Meanwhile,absorbency under load of the resin was compared with other different absorbing resins.
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