✦ LIBER ✦

Unperturbed dimensions of high molecular weight polyacrylonitrile

✍ Scribed by Bogdan C. Simionescu; Silvia Ioan; Maria Bercea; Cristofor I. Simionescu

Publisher: Elsevier Science
Year: 1991
Tongue: English
Weight: 196 KB
Volume: 27
Category: Article
ISSN: 0014-3057
DOI: 10.1016/0014-3057(91)90140-j

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✦ Synopsis

Unperturbed dimensions of high molecular weight (M W = 10 6 3" 106) polyacrylonitrile samples, prepared by plasma-induced polymerization, were determined in good solvents by the Stockmayer Fixman method [for dimethylformamide (DMF)] and Lenka method (for DMF, dimethylacetamide and dimethylsulphoxide) and in a theta solvent (ethylene carbonate:water, 85:15 by weight, at 44°C). The results were compared with literature data. The relatively large scattering of the data is attributed to the different heterogeneities of the materials, the different methods of calculation and to the ~b 0 constant values.

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