FATIGUE EFFECTS ON THE FREE-RADICAL STABILITY IN IRRADIATED POLYPROPYLENE FILLED WITH SILICA

Authors
SZOCS F KLIMOVA M CHODAK I
Citation
F. Szocs et al., FATIGUE EFFECTS ON THE FREE-RADICAL STABILITY IN IRRADIATED POLYPROPYLENE FILLED WITH SILICA, Materials letters, 31(3-6), 1997, pp. 287-289
Citations number
8
Categorie Soggetti
Material Science","Physics, Applied
Journal title
Materials letters → ACNP
ISSN journal
0167577X
Volume
31
Issue
3-6
Year of publication
1997
Pages
287 - 289
Database
ISI
SICI code
0167-577X(1997)31:3-6<287:FEOTFS>2.0.ZU;2-T
Abstract
Free radicals were generated in a composite of polypropylene filled wi th silica by the effect of gamma radiation and subsequently they were measured by the ESR method. The concentrations of free radicals were d etermined in the course of gradual heating of the samples in the inter val from -50 to 100 degrees C. The concentrations of free radicals in the samples fatigued by simple bending were higher than the concentrat ions of free radicals in non-fatigued samples. The gradual fatigue of material brings about a change in structure and a decrease in mobility of the polymer chains owing to which the decay of free radicals is in hibited.