Further Study of Unperturbed Chain Dimensions of Stereoregular Polyacrylonitrile in Solutions
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概要
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An atempt was made to evaluate the unperturbed chain dimensions A of polyacrylonitrile with a wide range of stereoregularity, and of copolymers of acrylonitrile (AN) and methacrylonitrile (MA) or vinylidene chloride (VDC). For this purpose, the fraction, separated from four PAN samples with meso-meso triad content mm=26, 51, 71 and 75% and together with those of copolymers from AN/MA (AN weight % ; 92) and AN/VDC (AN weight % :59) were utilized. The light scattering and viscosity data obtained for the above fractions were analyzed by the methods 2A〜2G, proposed previously.
- 2004-12-25
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