Gas chromatographic study of sorption of vinylchloride by unplasticized polyvinylchloride: Effect of concentration, temperature and polymer particle size

Autor:	Michael G. Kontominas, Panagiotis G. Demertzis, E. K. Voudouris
Rok vydání:	2007
Předmět:	Exothermic reaction chemistry.chemical_classification Materials science Chromatography Sorption Polymer Industrial and Manufacturing Engineering chemistry.chemical_compound Monomer Volume (thermodynamics) chemistry Phase (matter) Inverse gas chromatography Particle size Food Science
Zdroj:	International Journal of Food Science & Technology. 20:419-428
ISSN:	1365-2621 0950-5423
Popis:	Summary. The interaction of vinylchloride monomer with unplasticized polyvinylchloride is studied by inverse gas chromatography. The effect of monomer concentration, tem-perature and polymer particle size are particularly examined. The specific retention volume (V°g) of VCM was taken as the parameter of the PVCNCM interaction and was found to be dependent upon monomer concentration, polymer particle size and temperature. V°g increased exponentially at very low monomer concentrations, in-creased with decreasing resin particle size and decreased with increasing temperature. For a given resin particle size the effect of temperature on V°g is a lot more pronounced than the effect of particle size for a given temperature. Values for thermodynamic parameters calculated and peak shapes recorded are indicative of an exothermic, spontaneous interaction between PVCNCM, and support the ‘active site’ hypothesis which limits potential migration of the monomer from the polymer into a food contacting phase.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::798d05d03918337f820084c6abdc461a https://doi.org/10.1111/j.1365-2621.1985.tb01953.x Zobrazit plný text záznamu Plný text