Molecular weight distribution of methyl methacrylate grafted onto a microfiltration membrane by radiation-induced graft polymerization
Molecular weight distribution of methyl methacrylate grafted onto a microfiltration membrane by radiation-induced graft polymerization
复制标题
辐射诱导接枝聚合微滤膜接枝甲基丙烯酸甲酯的分子量分布
DOI：
10.1016/0376-7388(93)85007-j
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发表时间：
1993
影响因子：
9.5
通讯作者：
J. Okamoto
中科院分区：
文献类型：
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作者：
H. Yamagishi;Kyoichi Saito;S. Furusaki;T. Sugo;F. Hosoi;J. Okamoto
通过辐射诱导接枝聚合(RIGP)将甲基丙烯酸甲酯(MMA)接枝到三醋酸酯纤维素膜(MF)上。三醋酸酯纤维素膜经电子束辐照后产生自由基。然后，捕获的自由基与MMA单体在气相和液体中反应。在液相接枝中，接枝聚合速度较慢是由于膜中发生了自由基的链转移。用酸水解法成功地从接枝共聚物中分离出接枝聚合物支链。凝胶渗透色谱图表明，在相同接枝度下，气相接枝法制备的接枝链的数均相对分子质量高于液相接枝制备的接枝链。气相接枝到三醋酸酯纤维素膜上的聚甲基丙烯酸甲酯链的长度为103~104个单体单位，接枝率为50%~250%，其延伸长度相当于起始膜的孔径。
Methyl methacrylate (MMA) was grafted onto a cellulose triacetate microfiltration (MF) membrane by radiation-induced graft polymerization (RIGP). Radicals were produced in the cellulose triacetate MF membrane after the irradiation with electron beams. The trapped radicals were then reacted with the MMA monomer both in vapor and liquid phases. In the liquid-phase grafting, the slower rate of graft polymerization was due to the occurrence of a chain transfer of radicals in the membrane. The grafted polymer branches were satisfactorily isolated from the graft copolymer by means of an acid hydrolysis method. From the gel permeation chromatogram, the graft chains prepared by vapor-phase grafting had a higher number-average molecular weight than those obtained by liquid-phase grafting at an identical degree of grafting. The length of the poly-MMA chain grafted in a vapor phase onto the cellulose triacetate MF membrane ranged from 103to 104monomer units and the degree of grafting ranged from 50 to 250%; its extended length was tantamount to the pore radius of the starting MF membrane.
Satoshi Tsuneda、Kyoichi Saito、Shintaro Furusaki：“使用螯合中空纤维膜的金属收集”J. Membrane Sci.58。
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