ISSN:
0022-3832
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
The γ-ray-induced graft copolyinerization of cellulose and styrene by preirradiation was studied. (1) The graft copolymerization of cellulose and styrene was accelerated by immersing the cellulose in H202 solution during γ irradiation. The number of active sites such as hydroperoxides was estimated by the ferrous ion method. There is shown a correlation between the number of active sites and the rate of grafting. (2) The acetylation of the grafted cellulose-styrene polymer was carried out. The progress of the reaction was observed from the weight increase and infrared spectra measurement. The reaction proceeded very rapidly owing to the increased swelling of grafted polymer in the treating bath. (3) The acetylation of the cellulose-styrene polymer was next carried out under more severe conditions. In this case the ccllulose part of the grafted polymer was degraded by acetolysis and only the polystyrene was extracted from the grafted polymer. The viscosity-average molecular weight of the extracted polystyrene was estimated by viscometry and the degree of polymerization was calculated as 1.98 × l06. This value was compared with the number of the active sites estimated by the ferrous ion method.
Additional Material:
9 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pol.1961.1205115522
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