1.Stretching of PET films under constant load. II. Structural analysis G. Le Bourvellec, J. Beautemps Rhône-Poulenc Recherches-CRC, 85, Av. des Frères Perret, 69190 St Fons, France 2.Stretching of PET films under constant load. I : Kinetics of deformation Auteur(s) / Author(s) LE BOURVELLEC G. (1) ; BEAUTEMPS J. ; JARRY J. P.