NONLINEAR MECHANICAL SPECTROMETRY OF POLY(METHYL METHACRYLATE)

Citation
F. Povolo et Oa. Lambri, NONLINEAR MECHANICAL SPECTROMETRY OF POLY(METHYL METHACRYLATE), Journal of applied polymer science, 56(2), 1995, pp. 161-168
Citations number
22
Categorie Soggetti
Polymer Sciences
ISSN journal
00218995
Volume
56
Issue
2
Year of publication
1995
Pages
161 - 168
Database
ISI
SICI code
0021-8995(1995)56:2<161:NMSOPM>2.0.ZU;2-R
Abstract
Data on the damping spectra of commercial poly(methyl methacrylate) (P MMA) are reported, both at low (of the order of 1 Hz) and at intermedi ate (of the order of 50 Hz) frequencies. It is shown that the damping does not only depend strongly on temperature and frequency but also on the strain amplitude applied to the specimen. In other words, the dyn amic mechanical behavior of PMMA is nonlinear and cannot be described in terms of linear viscoelasticity. Finally, some aging effects in the damping, measured at low frequencies, are also reported. (C) 1995 Joh n Wiley and Sons, Inc.