MODELLING NON-LINEAR STRESS RELAXATION OF POLY(ETHYLENE TEREPHTHALATE)
The models presented in the literature to interpret the behavior of polymeric materials at stress relaxation stresses are essentially empirical or semi-empirical, not taking into consideration the physical (molecular) mechanisms responsible for the viscoelastic behavior. In the present study, a prev...
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| Format: | article |
| Language: | eng |
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2018
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| Online Access: | http://hdl.handle.net/10314/3885 |
| Country: | Portugal |
| Oai: | oai:bdigital.ipg.pt:10314/3885 |
| Summary: | The models presented in the literature to interpret the behavior of polymeric materials at stress relaxation stresses are essentially empirical or semi-empirical, not taking into consideration the physical (molecular) mechanisms responsible for the viscoelastic behavior. In the present study, a previously developed molecular model [1, 2] was applied with the purpose of describing the stress relaxation of polymeric materials, at various deformations and different temperatures, with and without previous heat treatment. |
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