接枝（部分羧甲基化瓜尔胶-g-聚 4-乙烯基苯磺酸）共聚物：从合成到应用。
Graft (partially carboxymethylated guar gum-g-poly vinyl sulfonic acid) copolymer: from synthesis to applications.
机构信息
Polymer Science Research Laboratory, Department of Chemistry, University of Allahabad, Allahabad, India.
出版信息
Carbohydr Polym. 2013 Sep 12;97(2):597-603. doi: 10.1016/j.carbpol.2013.02.084. Epub 2013 Apr 12.
The aim of the paper is to study the physico-chemical phenomenon of synthesized graft copolymer (carboxymethylated guar gum-g-vinylsulfonic acid). The reaction optimum conditions for grafting has also been determined by studying the effect of vinylsulfonic acid, hydrogen ion, peroxymonosulphate, glycolic acid concentration and carboxymethylated guar gum along with time and temperature. Experimental results show that maximum grafting has been obtained at 1.8 g dm(-3) concentration of partially carboxymethylated guar gum and 5.3 × 10(-2) mol dm(-3) concentration of vinylsulfonic acid. It has been observed that grafting ratio, add on, conversion, efficiency increase up to 4.0 × 10(-3) mol dm(-3) of hydrogen ion, 4 × 10(-3) mol dm(-3) of glycolic acid, 14 × 10(-3) mol dm(-3) of peroxymonosulphate and 35 °C of temperature. Grafted copolymer has been characterized by FTIR spectroscopy and thermogravimetric analysis. Water swelling, flocculating, metal ion uptake and resistance to biodegradability properties of partially carboxymethylated guar gum-g-vinylsulfonic acid have been determined.
本文旨在研究合成接枝共聚物（羧甲基瓜尔胶-g-乙烯基磺酸）的物理化学现象。通过研究乙烯基磺酸、氢离子、过一硫酸盐、乙二醇酸浓度以及羧甲基瓜尔胶的浓度、时间和温度对接枝的影响，确定了接枝的最佳反应条件。实验结果表明，在部分羧甲基瓜尔胶浓度为 1.8 g dm(-3)和乙烯基磺酸浓度为 5.3×10(-2) mol dm(-3)时，接枝率、接枝量、转化率和效率达到最大值。研究还发现，接枝比、接枝量、转化率和效率在氢离子浓度为 4.0×10(-3) mol dm(-3)、乙二醇酸浓度为 4×10(-3) mol dm(-3)、过一硫酸盐浓度为 14×10(-3) mol dm(-3)和温度为 35°C 时达到最大值。通过傅里叶变换红外光谱和热重分析对接枝共聚物进行了表征。测定了部分羧甲基瓜尔胶-g-乙烯基磺酸的水膨胀、絮凝、金属离子吸收和抗生物降解性等性能。
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