Resumo

MOREIRA, José C.; SILVA, Isabel F. da; WANG, Shu Hui  e  BALOGH, Debora T.. Determination of K and a constants of the Mark-Houwink equation of poly(p-acetoxystyrene). Polímeros [online]. 2004, vol.14, n.2, pp.80-82. ISSN 1678-5169.  https://doi.org/10.1590/S0104-14282004000200010.

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 (a and K) for the poly(p-acetoxystyrene) homopolymers (PASt) were determined by correlating their weight average molecular weight () values, determined by gel-permeation chromatography (GPC) relative to polystyrene standards, with their measured intrinsic viscosity values ([]). The of any unknown PASt sample may be estimated by first measuring the sample's intrinsic viscosity, and then applying these a and K values with the Mark-Houwink equation.

Palavras-chave : Intrinsic viscosity; molar mass; p-acetoxystyrene; synthesis.

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