棉纤维预辐射接枝NIPAAm的溶剂效应  

SOLVENT EFFECT ON GRAFT POLYMERIZATION OF NIPAAm ONTO COTTOM CELLULOSE VIA γ PREIRRADIATION METHOD

作　　者：卢君[1] 翟茂林[1] 伊敏[1] 哈鸿飞[1] 

机构地区：[1]北京大学技术物理系,北京100871

出　　处：《辐射研究与辐射工艺学报》2000年第2期124-128,共5页Journal of Radiation Research and Radiation Processing

基　　金：中国核工业科学基金!Y7197FY006

摘　　要：采用水和醇类及丙酮等有机溶剂组成的混合溶剂进行N-异丙基丙烯酰胺（NIPAAm）在棉纤维上的预辐射接枝，接枝率随着混合溶剂中成分的变化而变化。在甲醇和水的混合溶剂体系中，接枝率随单体浓度变化的曲线中出现凝胶效应。同样体系中，当单体分别为NIPAAm和丙烯酰胺（AAm）时，接枝率随温度变化的趋势有所不同。X射线衍射测定的接枝产物结晶度和接枝率的关系可以作为“第三相”反应机理的佐证。Graft polymerization of N-isopropylacrylamide (NIPAAm) onto cotton cellulose preirradiated in air by 60Co γ rays was accomplished in mixed solvents of water and alcohols or acetone. The graft yields changed with different ratios of water and organic solvents. In the system of solvents comprised of water and methanol, the Trommsdorff effect appeared in the curve of the graft yields vice verse the concentrations of the monomer. In the same system,the dependence of the graft yield of NIPAAm on the graft temperature was different from that of Acrylamide (AAm). The relation between the graf yields of the grafted products and their crystallinities measured by X Ray Diffraction could be regarded as a proof of the 'third phase'conception.

关 键 词：棉纤维 预辐射接枝 NIPAAM 溶剂效应 

分 类 号：TQ342.9[化学工程—化纤工业]