Molecular weight dependency of refractive index increment of polystyrene determined by uniform oligomers

✍ Scribed by Masanao Itakura; Keisuke Sato; Marina A. Lusenkova; Shigetomo Matsuyama; Kayori Shimada; Takeshi Saito; Shinichi Kinugasa

• Publisher: John Wiley and Sons
• Year: 2004
• Tongue: English
• Weight: 91 KB
• Volume: 94
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/app.21006

✦ Synopsis

Abstract

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