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将魔芋葡甘聚糖(KGM)、丙烯酸、尿素同时进行60CO-γ辐照接枝,制备丙烯酸-尿素-魔芋葡甘聚糖聚合物,并利用红外光谱、扫描电镜、透射电镜、差示扫描量热仪和元素分析技术对聚合产物结构和性能进行了分析。结果表明,尿素的最佳反应量为每3g魔芋粉7.5g,此时产物氮质量含量为8%,吸收自来水的倍数达146倍,植物有效水质量含量为99.73%。结构分析说明,KGM与丙烯酸接枝聚合物构成产物基质,形成孔结构,尿素及其衍生物为突起附着在孔结构上,尿素与KGM未发生接枝反应。溶液态产物具有KGM-丙烯酸接枝物的凝胶团结构和尿素及衍生物的网状结构共存的微观形貌。
Acrylic acid-urea-konjac glucomannan polymer was prepared by grafting KGM, acrylic acid and urea simultaneously with 60CO-γradiation. The effects of IR, UV-Vis, TEM, The structure and properties of the polymerization products were analyzed by calorimetry and elemental analysis. The results showed that the optimum reaction rate of urea was 7.5g per 3g of konjac flour. At this time, the nitrogen content of the product was 8%, the times of absorbing tap water were 146 times, and the effective water content of the plant was 99.73%. Structural analysis shows that KGM and acrylic acid graft polymer constitute the product matrix, forming a pore structure. Urea and its derivatives attach to the pore structure as protrusions, and no graft reaction between urea and KGM occurs. The solution-like product has the microscopic morphology of the coacervation of the gel-group structure of KGM-acrylic grafts and the network structure of urea and derivatives.