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Escola Superior de Tecnologia e Gestão (ESTG) >
Artigos em Revista Internacional (ESTG) >
Utilize este identificador para referenciar este registo:
http://hdl.handle.net/10314/3392
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| Título: | Comprehensive Modelling of the Experimental Temperature and Stress Response of Time-Dependent Materials”, Macromolecular Symposia |
| Autores: | José, André
José, Cruz Pinto |
| Palavras Chave: | cooperative effects
creep |
| Data: | 2007 |
| Editora: | Wiley InterScience - Macroml. Symp. |
| Resumo: | The stress- and temperature-dependent non-linear creep behaviour of
polymers and other materials is quantitatively modelled as a superposition of a wide
range of activated motions at the molecular scale, covering wide but well-defined
space and time scales. The resulting time, temperature and stress dependences are
coupled (not fully separable) except at low stress values, where linear viscoelastic
behaviour is directly obtained, improving on previous (approximate or questionable)
time-temperature and time-stress superposition or equivalence relationships. The
behaviour has been shown to have a strong cooperative nature, which may be
interpreted in terms of varying clusters of identifiable structural elements within the
material. Reasonably good descriptions of the experimental creep behaviour of both
amorphous and semicrystalline polymers have already been achieved, but this work
concentrates on the behaviour of an amorphous polycarbonate (PC), including the
physical characterization and modelling of its retardation time spectrum. |
| URI: | http://hdl.handle.net/10314/3392 |
| Aparece nas Colecções: | Artigos em Revista Internacional (ESTG)
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Ficheiros deste Registo:
| Ficheiro |
Descrição |
Tamanho | Formato |
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| art_Macrom_Symp_TOP_pg1.pdf | | 77Kb | Adobe PDF | Ver/Abrir | |
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