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Graft copolymerization of acrylic acid onto guar gum

机译:丙烯酸在瓜尔胶上的接枝共聚

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The graft copolymerization of acrylic acid (AA) onto guar gum (GOH) was carried out by a peroxydiphosphate (PDP)-silver(I) system. Grafting ratio, efficiency, add-on, and conversion increase upon increasing the concentration of PDP and acrylic acid, whereas they decrease upon increasing the concentration of guar gum. Upon increasing the concentration of silver and hydrogen ions up to 2.0 x 10(-3) and 4.87 x 10(-2) mol dm(-3), respectively, the grafting ratio and efficiency increase but decrease upon further increasing the concentration. The increase in temperature from 30 to 45 degrees C increases the grafting ratio but the conversion efficiency decreases. The optimum time period for graft copolymerization was found to be 2 h. The graft copolymers were characterized by infrared spectroscopy and thermogravimetric analysis. (C) 2000 John Wiley & Sons, Inc. [References: 9]
机译:丙烯酸(AA)在瓜尔胶(GOH)上的接枝共聚反应是通过过氧二磷酸(PDP)-银(I)系统进行的。接枝率,效率,添加量和转化率随PDP和丙烯酸浓度的增加而增加,而随瓜尔胶浓度的增加而降低。当银离子和氢离子的浓度分别增加到2.0 x 10(-3)和4.87 x 10(-2)mol dm(-3)时,接枝率和效率会增加,但随着浓度的增加,接枝率和效率会降低。温度从30摄氏度增加到45摄氏度会增加接枝率,但转化效率会降低。发现接枝共聚的最佳时间为2小时。通过红外光谱和热重分析对接枝共聚物进行了表征。 (C)2000 John Wiley&Sons,Inc. [参考:9]

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