Abstract
The present paper describes the changes of the orientation in the crystalline region of cellulose films in the ceric salt-initiated graft copolymerization of acrylamide. The biaxial orientation of the crystallographic axes of the cellulose II was evaluated by the methods given by Wilchinsky, Stein and Kawai-Takahara. The crystallites suffer large strains by the formation of poly-acrylamide and a grain boundary migration occurs. As the result, their texture shifts gradually towards random orientation. The X-ray diffraction intensity of the cellulose crystallites begins to weaken at the graft ratio of 140_??_150%, and it completely disappears at above 250% grafting. From these results, it is concluded that Cellulose II crystallites are fractured in the highly grafted samples.
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