DEFECT DIFFUSION MODELS FOR INTERNAL FRICTION PROCESSES IN POLYETHYLENE

We know that D m ` is Gaussian, as ` → +∞, (since it is a linear combination of asymptotically normal random variables living in different order chaoses; see [PT05]) and we can

dimensional defect consisting of an isolated impurity plane bounded by different (than in the bulk) force. constants to its two

L’archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des

Now both types of vacancy can ionize to give free holes and electrons ; however, as both our own calculations [12] and Kroger's ana- lysis [15] show, electrons

L’archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des

Résumé.- Nous présentons les méthodes et les modèles utilisés pour calculer les énergies et les configurations des défauts ponctuels situés dans le coeur des dislocations dans

Although the scattering of light is strong for E~ and E~ due to the presence of chain ends in the core, it is not so for E~ lines which disappear for a chain perpendicular

of the different EPR spectra. While this method has been successfully used in the pioneering work of Kanzig and co-workers on tlie relaxation of the paraelastic