Artículo
Rubiolo, G.H.; Somoza, A.; Goyanes, S.N.; Consolati, G.; Marzocc, A.J. "Characterization of γ-irradiated polymethyl methacrylate by means of mechanical properties and positron annihilation lifetime spectroscopy" (1999) Physical Review B - Condensed Matter and Materials Physics. 60(6):3792-3798
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Abstract:
An experimental investigation was undertaken to assess the effect of γ irradiation on the “structural” state and the corresponding inelastic deformation behavior of polymethyl methacrylate (PMMA). Uniaxial and constant strain rate compression tests were conducted over a range of strain rates at room temperature on glassy polymer specimens of PMMA subjected to different γ-irradiation doses. Measurements of positron annihilation lifetime spectroscopy were performed on samples before the compression test in an attempt to correlate free volume content with yield stress. A kinetic law of plastic flow considering a local shear transformation in a small volume Ω is used to represent the observed mechanical behavior. The density and size of the clusters are found for the material subjected to different irradiation dose. Positron annihilation lifetime spectroscopy was also used to estimate the size and number density of free volume sites in the polymer specimens. The dependence of both magnitudes with the irradiation dose follows those of the plastic cluster of volume Ω. Both results provide experimental evidence that the density and the size of high free volume sites can be used as an internal state variable for characterizing the mechanical state of glassy polymers. © 1999 The American Physical Society.
Registro:
| Documento: | Artículo |
| Título: | Characterization of γ-irradiated polymethyl methacrylate by means of mechanical properties and positron annihilation lifetime spectroscopy |
| Autor: | Rubiolo, G.H.; Somoza, A.; Goyanes, S.N.; Consolati, G.; Marzocc, A.J. |
| Filiación: | Universidad de Buenos Aires, Facultad de Ciencias Exactas y Natuales, Departamento Física, LPMPyMC, Ciudad Universitaria, Pabellon 1, Buenos Aires, 1428, Argentina Departamento de Materiales, CNEA-CAC, Avenida Del Libertador 8250, Buenos Aires, 1429, Argentina Universidad Nacional del Centro de la Provincia de Buenos Aires, IFIMAT, Pinto 399, Tandil, 7000, Argentina Comisión de Investigaciones Científicas de la Provincia de Buenos Aires, Buenos Aires, Argentina Instituto Nazionale di Fisica Della Materia, Dipartimento di Fisica, Politecnico di Milano, Piazza Leonardo da Vinci 32, Milano, I-20133, Italy |
| Año: | 1999 |
| Volumen: | 60 |
| Número: | 6 |
| Página de inicio: | 3792 |
| Página de fin: | 3798 |
| DOI: | http://dx.doi.org/10.1103/PhysRevB.60.3792 |
| Título revista: | Physical Review B - Condensed Matter and Materials Physics |
| Título revista abreviado: | Phys. Rev. B Condens. Matter Mater. Phys. |
| ISSN: | 10980121 |
| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10980121_v60_n6_p3792_Rubiolo |
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Citas:
---------- APA ----------
Rubiolo, G.H., Somoza, A., Goyanes, S.N., Consolati, G. & Marzocc, A.J. (1999) . Characterization of γ-irradiated polymethyl methacrylate by means of mechanical properties and positron annihilation lifetime spectroscopy. Physical Review B - Condensed Matter and Materials Physics, 60(6), 3792-3798.http://dx.doi.org/10.1103/PhysRevB.60.3792
---------- CHICAGO ----------
Rubiolo, G.H., Somoza, A., Goyanes, S.N., Consolati, G., Marzocc, A.J. "Characterization of γ-irradiated polymethyl methacrylate by means of mechanical properties and positron annihilation lifetime spectroscopy" . Physical Review B - Condensed Matter and Materials Physics 60, no. 6 (1999) : 3792-3798.http://dx.doi.org/10.1103/PhysRevB.60.3792
---------- MLA ----------
Rubiolo, G.H., Somoza, A., Goyanes, S.N., Consolati, G., Marzocc, A.J. "Characterization of γ-irradiated polymethyl methacrylate by means of mechanical properties and positron annihilation lifetime spectroscopy" . Physical Review B - Condensed Matter and Materials Physics, vol. 60, no. 6, 1999, pp. 3792-3798.http://dx.doi.org/10.1103/PhysRevB.60.3792
---------- VANCOUVER ----------
Rubiolo, G.H., Somoza, A., Goyanes, S.N., Consolati, G., Marzocc, A.J. Characterization of γ-irradiated polymethyl methacrylate by means of mechanical properties and positron annihilation lifetime spectroscopy. Phys. Rev. B Condens. Matter Mater. Phys. 1999;60(6):3792-3798.http://dx.doi.org/10.1103/PhysRevB.60.3792
