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Specific refractive index increments of polymers and copolymers in several solvents

โœ Scribed by A. Bello; G.M. Guzman

Publisher
Elsevier Science
Year
1966
Tongue
English
Weight
325 KB
Volume
2
Category
Article
ISSN
0014-3057

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โœฆ Synopsis

Differential refractometry has been used to obtain accurate values of the specific refractive index increments for the following polymers in several solvents: polystyrene, poly(methyl methacrylate), poly(4-vinyl pyridine), block copolymers of styrene with methyl methacrylate and of styrene with 4-vinyl pyddine. Examples of the application of the dn/dc parameter to determine the composition of copolymers and to detect differences in stereochemical configuration of polymers are also given. The Gladstone-Dale equation is shown to be a convenient method to predict dn/dc from the refractive index of the solvent and values of the refractive index of the polymer and its specific volume.

๐Ÿ“œ SIMILAR VOLUMES

Specific refractive index increments of
Specific refractive index increments of segmented polyurethanes
โœ J. Dostรกl; L. ล imek; V. Kaลกpรกrkovรก; M. Bohdaneckรฝ ๐Ÿ“‚ Article ๐Ÿ“… 1998 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 199 KB

Specific refractive index increments n of polyester-based segmented polyurethanes in N,N-dimethyl formamide have been determined, and the quotient d n/df d has been evaluated (where f d is the weight fraction of hard-segment units). The results are in good agreement with the values calculated from g