Abstract
Dynamic birefringence and viscoelasticity for cellulose acetate butyrate, CAB, were measured simultaneously at various temperatures covering a wide frequency region from the rubbery plateau to the glassy zone in order to discuss the viscoelastic segment size of cellulose. The segment sizes for cellulose derivatives are larger than vinyl polymers, reflecting the stiff chain structure of β-linked D-glucose units (about 10 glucose units per segment).
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