Premium
Chemical and thermal characterization of high‐ and low‐density irradiated polyethylenes
Author(s) -
Sáenz De JuanoArbona V.,
VallésLluch A.,
ContatRodrigo L.,
RibesGreus A.
Publication year - 2002
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.11110
Subject(s) - irradiation , materials science , relaxation (psychology) , molar mass distribution , polymer chemistry , characterization (materials science) , spectral line , radiation , analytical chemistry (journal) , composite material , chemistry , polymer , organic chemistry , optics , nanotechnology , nuclear physics , psychology , social psychology , physics , astronomy
A comparative study of the dynamic mechanical relaxation spectra of high‐ and low‐density polyethylenes irradiated with γ‐radiation from a Co 60 source was performed. The irradiation doses ranged from 0 to 100 Mrad. All the samples were previously characterized by determination of the molecular weight distribution, the number of functional groups, and the crystalline fraction. All the relaxation zones between −145°C and the melt were studied in the frequency range from 0.3 to 30 Hz. The changes observed in the mechanical relaxation spectra were related to modifications in the chemical structure and morphological parameters attributed to the exposure of the samples to the γ‐radiation. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 86: 1953–1958, 2002