"Comparison of the Molecular Weight and Size Measurement of Polyisobuty" by Judit Puskas, Yaohong Chen et al.
 

Title

Comparison of the Molecular Weight and Size Measurement of Polyisobutylenes by Size Exclusion Chromatography/multi-angle Laser Light Scattering and Viscometry

Document Type

Article

Publication Date

Spring 1-27-2006

Abstract

This note reviews hyphenated size exclusion chromatography (SEC) techniques and compares polyisobutylene SEC analyses by multi-angle laser light scattering and viscometry. The weight-average molecular weight and number-average molecular weight were found to be independent of the molecular weight measurement technique used. The reproducibility was found to be better when a known refractive-index increment was used. Significantly, large differences were found in z-average molecular weight data measured by the different techniques. The low shear (Mooney) viscosity correlated well with the weight-average molecular weight and z-average molecular weight only in the case of good SEC separation.

Publication Title

Journal of Polymer Science Part A: Polymer Chemistry

Volume

44

Issue

5

First Page

1777

Last Page

1783

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