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(Reference retrieved automatically from SciELO through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Determination of K and alpha constants of the Mark-Houwink equation of poly(p-acetoxystyrene)

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Author(s):
José C. Moreira [1] ; Isabel F. da Silva [2] ; Shu Hui Wang [3] ; Debora T. Balogh [4]
Total Authors: 4
Affiliation:
[1] Universidade de São Paulo. Departamento de Engenharia Metalurgica e de Materiais
[2] Universidade de São Paulo. Departamento de Engenharia Metalurgica e de Materiais
[3] Universidade de São Paulo. Departamento de Engenharia Metalurgica e de Materiais
[4] Universidade de São Paulo. Instituto de Física de São Carlos
Total Affiliations: 4
Document type: Journal article
Source: POLIMEROS-CIENCIA E TECNOLOGIA; v. 14, n. 2, p. 80-82, 2004-06-00.
Abstract

The hydrodynamic volume concept can be used effectively with gel-permeation chromatography (GPC) and viscosity data to estimate the molecular weight of a variety of polymers. In this work, the Mark-Houwink coefficients (alpha and K) for the poly(p-acetoxystyrene) homopolymers (PASt) were determined by correlating their weight average molecular weight (<IMG SRC="/img/revistas/po/v14n2/21574s1.gif">) values, determined by gel-permeation chromatography (GPC) relative to polystyrene standards, with their measured intrinsic viscosity values ([<IMG SRC="/img/revistas/po/v14n2/21574s3.gif">]). The <IMG SRC="/img/revistas/po/v14n2/21574s2.gif">of any unknown PASt sample may be estimated by first measuring the sample's intrinsic viscosity, and then applying these alpha and K values with the Mark-Houwink equation. (AU)