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Molecular weight dependency of refractive index increment of polystyrene determined by uniform oligomers
Author(s) -
Itakura Masanao,
Sato Keisuke,
Lusenkova Marina A.,
Matsuyama Shigetomo,
Shimada Kayori,
Saito Takeshi,
Kinugasa Shinichi
Publication year - 2004
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.21006
Subject(s) - polystyrene , refractive index , refractometer , polymer chemistry , tetrahydrofuran , materials science , molar mass distribution , wavelength , degree of polymerization , polymerization , analytical chemistry (journal) , chemistry , polymer , composite material , chromatography , organic chemistry , solvent , optoelectronics
Molecular weight dependency of a specific UV absorption coefficient of polystyrene in solution was determined by supercritical fluid chromatography applied to equimolar and equimass mixtures of uniform polystyrenes whose degree of polymerization was n = 1 to 40. From the ratio between the response from a UV detector and that from a refractometer, we determined the refractive index increment dn / dc as a function of molecular weight for polystyrene in tetrahydrofuran at the wavelength λ = 633 nm. We found that dn / dc is well expressed as a linear function of the reciprocal of molecular weight for uniform polystyrenes. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 94: 1101–1106, 2004