Structure and Molecular Weight Determinations of Unsaturated Polyester Prepolymers by Steric Exclusion Chromatography

Author:

Leroux F.1,Mortaigne B.1,Belan F.2

Affiliation:

1. DGA/ETCA/Centre de Recherches et d'Etudes d'Arcueil, 16 bis avenue Prieur de la Cote d'Or, 94114 Arcueil, France

2. Cray Valley Total, Centre de Recherches de Verneuil en Halatte, Parc Alata - BP 22, 60550 Verneuil en Halatte, France

Abstract

Four model unsaturated polyester prepolymers and two industrial resins were studied by size exclusion chromatography (SEC). A calibration curve was set up with model resins and used to characterize the industrial unsaturated polyester resins. Weight average molecular prepolymer weights were determined from the new calibration curve. They were lower than those determined with polystyrene or epoxy calibration curves. The observation of SEC chromatographs proves the formation of diol-ISO-diol (where ISO = isophthalic acid) and MAA-diol-MAA structures (where MAA = maleic anhydride) in the beginning of polycondensation reactions. This gives information on the future structure of the UP network.

Publisher

SAGE Publications

Subject

Materials Chemistry,Polymers and Plastics,Ceramics and Composites

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