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Escola Superior de Tecnologia e Gestão (ESTG) >
Artigos em Acta de Conferência Internacional (ESTG) >
Utilize este identificador para referenciar este registo:
http://hdl.handle.net/10314/3398
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| Título: | Validation of a Non-linear Molecular Model of Polymer Creep |
| Autores: | André, José Reinas
José, Cruz Pinto |
| Palavras Chave: | Creep
PMMA |
| Data: | 2004 |
| Editora: | IUPAC MACRO 2004, Paris, França, 2004 |
| Resumo: | Previous models for the interpretation of the creep behaviour of
polymers are of course valuable, but mainly empirical or semiempirical, and do not directly take into account the physical
(molecular) underlying mechanisms, namely the detailed
conformational and other transitions responsible for the material’s
non-linear viscoelastic behaviour [1-10].
Any realistic and accurate model should predict and quantify the
peculiar and coupled time-temperature-stress behaviour, and this is
shown to be possible by adequate kinetic formulation of the
frequencies (or retardation times) of the whole range of structural
contributors to the material’s compliance. One should mention here
the old but seminal work by Eyring et al. [11,12], which at least had
the merit to suggest how one could physically and mathematically link
the oldest, Voigt-Kelvin and other, phenomenological models to the
actual non-linear physical behaviour at the molecular scale. |
| URI: | http://hdl.handle.net/10314/3398 |
| Aparece nas Colecções: | Artigos em Acta de Conferência Internacional (ESTG)
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Ficheiros deste Registo:
| Ficheiro |
Descrição |
Tamanho | Formato |
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| L1137.pdf_MACRO_2004.pdf | | 202Kb | Adobe PDF | Ver/Abrir | |
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