THERMOSTIMULATED CREEP STUDY OF THE ALPHA RETARDATION MODE IN EPOXY-GLASS BEADS COMPOSITES

Citation
A. Dufresne et C. Lacabanne, THERMOSTIMULATED CREEP STUDY OF THE ALPHA RETARDATION MODE IN EPOXY-GLASS BEADS COMPOSITES, Polymer composites, 14(3), 1993, pp. 238-246
Citations number
29
Categorie Soggetti
Polymer Sciences","Material Science
Journal title
ISSN journal
02728397
Volume
14
Issue
3
Year of publication
1993
Pages
238 - 246
Database
ISI
SICI code
0272-8397(1993)14:3<238:TCSOTA>2.0.ZU;2-J
Abstract
Thermo-stimulated creep (TSCr) analysis was performed to characterize the anelastic properties around the glass transition of the model syst em: epoxy resin-glass beads. Different interphase regions have been de liberately formed by means of a silane coupling agent and an elastomer ic adduct coating. In all samples the primary retardation mode, labele d alpha, has been found around 140-degrees-C. This retardation mode ha s been associated with the anelastic manifestation of the glass transi tion of epoxy resin. The relative magnitude of this mode in filled epo xy has been used to estimate the interphase thickness. By applying ''f ractional stresses'' the complex alpha peak has been experimentally re solved and local changes of morphology in the interphase zone are evid enced in terms of mobility and kinetic of motion. This last technique has also allowed us to compare the length of the mobile units liberate d at the glass transition as a function of the filler-matrix interphas e.