Scaling behavior of the Raman intensity and heterogeneous elasticity during the chemical vitrification of an epoxy resin
The density of vibrational states of amorphous materials deviates from that expected from the Debye model, giving rise to a characteristic excess of states known as boson peak (BP). Despite the long-standing interest in this characteristic feature, its origin and behavior remain a source of controve...
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| Format: | Article |
| Language: | English |
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Accademia Peloritana dei Pericolanti
2020-10-01
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| Series: | Atti della Accademia Peloritana dei Pericolanti : Classe di Scienze Fisiche, Matematiche e Naturali |
| Online Access: |
http://dx.doi.org/10.1478/AAPP.98S1A7
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| _version_ | 1828497542644498432 |
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| author | Silvia Corezzi Lucia Comez |
| author_facet | Silvia Corezzi Lucia Comez |
| author_sort | Silvia Corezzi |
| collection | DOAJ |
| description | The density of vibrational states of amorphous materials deviates from that expected from the Debye model, giving rise to a characteristic excess of states known as boson peak (BP). Despite the long-standing interest in this characteristic feature, its origin and behavior remain a source of controversy, in particular its scaling behavior and its relation to the elastic properties of the material. In this regard, the theory of elastic heterogeneity, based on the notion that the structural disorder induces spatially fluctuating local elastic moduli, offers an interesting reading key for the BP behavior. In this paper we consider the evolution of the Raman signal in the BP region, during the isothermal vitrification process of an epoxy resin induced by the progressive polymerization of the molecules in the system, and provide a critical discussion of the observed scaling behavior in the framework of the theory of heterogeneous elasticity. |
| first_indexed | 2024-12-11T12:50:33Z |
| format | Article |
| id | doaj.art-c879263b948c4b6296d9ff6914f28480 |
| institution | Directory Open Access Journal |
| issn | 0365-0359 1825-1242 |
| language | English |
| last_indexed | 2024-12-11T12:50:33Z |
| publishDate | 2020-10-01 |
| publisher | Accademia Peloritana dei Pericolanti |
| record_format | Article |
| series | Atti della Accademia Peloritana dei Pericolanti : Classe di Scienze Fisiche, Matematiche e Naturali |
| spelling | doaj.art-c879263b948c4b6296d9ff6914f284802022-12-22T01:06:43ZengAccademia Peloritana dei PericolantiAtti della Accademia Peloritana dei Pericolanti : Classe di Scienze Fisiche, Matematiche e Naturali0365-03591825-12422020-10-0198S1A710.1478/AAPP.98S1A7AAPP.98S1A7Scaling behavior of the Raman intensity and heterogeneous elasticity during the chemical vitrification of an epoxy resinSilvia CorezziLucia ComezThe density of vibrational states of amorphous materials deviates from that expected from the Debye model, giving rise to a characteristic excess of states known as boson peak (BP). Despite the long-standing interest in this characteristic feature, its origin and behavior remain a source of controversy, in particular its scaling behavior and its relation to the elastic properties of the material. In this regard, the theory of elastic heterogeneity, based on the notion that the structural disorder induces spatially fluctuating local elastic moduli, offers an interesting reading key for the BP behavior. In this paper we consider the evolution of the Raman signal in the BP region, during the isothermal vitrification process of an epoxy resin induced by the progressive polymerization of the molecules in the system, and provide a critical discussion of the observed scaling behavior in the framework of the theory of heterogeneous elasticity. http://dx.doi.org/10.1478/AAPP.98S1A7 |
| spellingShingle | Silvia Corezzi Lucia Comez Scaling behavior of the Raman intensity and heterogeneous elasticity during the chemical vitrification of an epoxy resin Atti della Accademia Peloritana dei Pericolanti : Classe di Scienze Fisiche, Matematiche e Naturali |
| title | Scaling behavior of the Raman intensity and heterogeneous elasticity during the chemical vitrification of an epoxy resin |
| title_full | Scaling behavior of the Raman intensity and heterogeneous elasticity during the chemical vitrification of an epoxy resin |
| title_fullStr | Scaling behavior of the Raman intensity and heterogeneous elasticity during the chemical vitrification of an epoxy resin |
| title_full_unstemmed | Scaling behavior of the Raman intensity and heterogeneous elasticity during the chemical vitrification of an epoxy resin |
| title_short | Scaling behavior of the Raman intensity and heterogeneous elasticity during the chemical vitrification of an epoxy resin |
| title_sort | scaling behavior of the raman intensity and heterogeneous elasticity during the chemical vitrification of an epoxy resin |
| url |
http://dx.doi.org/10.1478/AAPP.98S1A7
|
| work_keys_str_mv | AT silviacorezzi scalingbehavioroftheramanintensityandheterogeneouselasticityduringthechemicalvitrificationofanepoxyresin AT luciacomez scalingbehavioroftheramanintensityandheterogeneouselasticityduringthechemicalvitrificationofanepoxyresin |