Ammonium Y zeolite applied as a thermochemolysis reagent for identification of polyethers and polyesters

Blazsó, Marianne and Bozi, János (2013) Ammonium Y zeolite applied as a thermochemolysis reagent for identification of polyethers and polyesters. Journal of Chromatography A, 1271 (1). pp. 217-220. ISSN 0021-9673

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Abstract

A potential thermochemolysis reagent has been tested for the pyrolysis gas chromatographic identification of polyether, polyester and polyether- or polyester-based thermoplastic polyurethane. The main advantage of ammonium Y zeolite over liquid reagents is that it does not react prior to pyrolysis, and its reactions have no incomplete products. The procedure of the thermochemolysis is as simple as running a pyrolysis-GC/MS analysis sampling a powder mixture of roughly equal mass of polymer and ammonium Y zeolite. The GC/MS chromatograms obtained show that the products of thermochemolysis are specific to the diol and dicarboxylic units of the polymer. It was observed that ethanal or 1,4-dioxane forms from ethylene oxide components of polyethers and polyesters, tetrahydrofuran from butylene oxide units, hexanedinitrile from adipate groups, and benzodinitrile from terephthalate groups.

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