New methods for determining the molecular weight of polyaniline by size exclusion chromatography

被引：19

作者：

Yang, D ^{[1
]}

Adams, PN ^{[1
]}

Goering, R ^{[1
]}

Mattes, BR ^{[1
]}

机构：

[1] Santa Fe Sci & Technol Inc, Santa Fe, NM 87507 USA

来源：

SYNTHETIC METALS | 2003年 / 135卷 / 1-3期

关键词：

polyaniline; gel-permeation chromatography; molecular weight; and UV-NIR-VIS solution spectra;

D O I：

10.1016/S0379-6779(02)00529-5

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Aggregation of polyaniline emeraldine base dissolved in polar aprotic solvents containing lithium chloride salt results in distorted non-Gaussian elution peaks in the size exclusion chromatogram. This results in significant error for the calculation of the weight average and number average molecular weights measured by size exclusion chromatography. We compare the effectiveness of LiCl, LiBr, and LiBF4, for limiting polymer aggregation in a high molecular weight sample of polyaniline, and thereby improving chromatographic peak shape. Weight average and number average molecular weight values were most accurately determined for dilute polyaniline in NMP solutions containing LiBF4.

引用

页码：293 / 294

页数：2

共 8 条

[1] Low temperature synthesis of high molecular weight polyaniline using dichromate oxidant. [J].