ジアルデヒドセルロースへの光照射グラフト重合における波長,カルボニル基および溶媒の影響

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タイトル別名
  • EFFECT OF WAVELENGTH, CARBONYL GROUP AND SOLVENT ON PHOTO-INDUCED GRAFT POLYMERIZATION ONTO DIALDEHYDE CELLULOSE

抄録

Graft polymerization of various vinyl monomers onto dialdehyde cellulose (H-sample) by a photo-induced method was carried out in aqueous systems using qualz and pyrex tube, and the results were compared with those for the photo-induced graft polymerization onto purified cotton linter (C-sample).<br>The degree of grafting of methyl methacrylate (MMA) onto H-sample contained a small amounts of carbonyl group is greater than that onto C-sample. H-sample was easily grafted by the light with the wavelength above 300nm. The chain scission in H-sample occurred with the light of 253nm wavelength. From these results, it is indicated that the graft polymerization proceeds mainly via the photolysis of carbonyl groups in cellulose, and the difference in the wavelength of absorbed light has an effect on the grafting site.<br>In the graft polymerization of various vinyl monomers onto H-sample, the total conversion and the degree of grafting increased with increasing carbonyl group content in cellulose. The grafting activity decreased in the order of MMA, acrylamide, vinyl acetate, acrylonitrile and styrene.<br>In the graft polymerization of MMA in aqueous organic solvent systems, the degree of grafting decreased with increase of the organic solvent concentration, but the grafting efficiency yield 85-95%. The chain transfer constants of CCl4, i-BuOH, (Me)2CO and dimethylformamide were 10.3, 3.8, 1.3 and 0.7×10-5, respectively.

収録刊行物

  • 繊維学会誌

    繊維学会誌 33 (10), T508-T514, 1977

    社団法人 繊維学会

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