Tracer diffusion of deuterated polystyrene into polystyrene–poly(α-methyl styrene) studied by nuclear reaction analysis

Autor:	Richard A. L. Jones, M.G.D. van der Grinten, A.S. Clough, Mark Geoghegan, T.E. Shearmur
Rok vydání:	1998
Předmět:	Polymers and Plastics Chemistry Organic Chemistry Analytical chemistry Styrene chemistry.chemical_compound Deuterium TRACER Nuclear reaction analysis Polymer chemistry Materials Chemistry Polystyrene Polymer blend Electrochemical gradient Glass transition
Zdroj:	Scopus-Elsevier
ISSN:	0032-3861
DOI:	10.1016/s0032-3861(97)10286-5
Popis:	The tracer diffusion of deuterated polystyrene (dPS) into natural polystyrene–poly( α -methyl styrene) (hPS–P α MS) blends has been studied as well as the diffusion of dPS–P α MS blends into hPS–P α MS blends. Nuclear reaction analysis (NRA) as a depth profiling technique is shown to be useful to study the different systems. The diffusion constants have been determined as a function of temperature and as a function of composition of the blend of the tracer and the matrix. Blends as a tracer show a strong enhancement in diffusion in comparison to the pure dPS tracer, indicating that the intradiffusion coefficient measured in a sample where there is no chemical gradient is much bigger than the tracer diffusion measured from a thin film of pure dPS. The glass transition temperature T g has a considerable influence on the diffusion.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::409140482cbf064adfc9b2ef9bf2695e https://doi.org/10.1016/s0032-3861(97)10286-5 Zobrazit plný text záznamu Full Text from ScienceDirect