Radiation effects on a linear model compound for polyethers
Résumé
Radiation effects on a model polyether - poly(tetramethylene) glycol (PTMG) induced by high energy radiation were investigated. To understand the degradation mechanism, electron paramagnetic resonance (EPR), Fourier transform infra-red spectroscopy (FTIR), electrospray and gas mass spectrometry (ESI-MS and gas-MS), were carried out to identify radicals and chemical modifications. Size exclusion chromatography (SEC) was used to follow the evolution of the distribution of molecular weight. On the basis of the results, a mechanism of degradation for PTMG is proposed. © 2011 Elsevier Ltd. All rights reserved.
Mots clés
epr
oxidation
polymers
ftir
degradation
degradation mechanism
gas mass
linear model
chemistry
mechanism of degradation
radiolysis
electrosprays
electron paramagnetic resonances (epr)
electron paramagnetic resonance
linear modeling
polyoxymethylene
polyethylene oxide
esi-ms
fourier transform infra red (ftir) spectroscopy
polyurethanes
high energy radiation
msgas
polyether
sec
gamma-irradiation
molecular-weight
poly(ethylene oxide) solutions
epr