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

被引:24
作者
Itakura, M
Sato, K
Lusenkova, MA
Matsuyama, S
Shimada, K
Saito, T
Kinugasa, S
机构
[1] AIST, Metrol Inst Japan, Organ Analyt Chem Div, Polymer Standards Sect, Tsukuba, Ibaraki 3058565, Japan
[2] Japan Chem Innovat Inst, High Polymer Test & Evaluat Ctr, Tokyo 1110052, Japan
关键词
refractive index (RI); polystyrene; supercritical fluid chromatography (SFC); light scattering; molecular weight distribution;
D O I
10.1002/app.21006
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
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 gimel = 633 nm. We found that dn/dc is well expressed as a linear function of the reciprocal of molecular weight for uniform polystyrenes. (C) 2004 Wiley Periodicals, Inc.
引用
收藏
页码:1101 / 1106
页数:6
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