On the molar mass dependence of the thermal diffusion coefficient of polymer solutions

被引：53

作者：

Rauch, J ^{[1
]}

Köhler, W ^{[1
]}

机构：

[1] Univ Bayreuth, Inst Phys, D-95440 Bayreuth, Germany

来源：

MACROMOLECULES | 2005年 / 38卷 / 09期

关键词：

D O I：

10.1021/ma050231w

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The problem of molar mass dependence of the thermal diffusion coefficient in polymer solutions was investigated. It was found that all the measurements were carried out on PS in toluene. It was observed that the molar mass independence of the thermal diffusion coefficient broke down under two conditions. The results show that the molar mass dependence approximately vanished at an intermediate concentration of c ≈ 0.4 where the effect of increasing DTO and decreasing DT due to increased friction almost compensated for all molar masses.

引用

页码：3571 / 3573

页数：3

共 24 条

[1]

BROCHARD F, 1981, CR ACAD SCI II, V293, P1025

[2] Soret coefficients for aqueous polyethylene glycol solutions and some tests of the segmental model of polymer thermal diffusion [J].