Linear viscoelasticity of immiscible blends: The application of creep
| Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
|---|---|
| Data(s) |
03/10/2013
03/10/2013
01/09/2012
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| Resumo |
A new method to characterize the long-time linear relaxation mechanisms of immiscible blends based on creep experiment was developed. Small-amplitude oscillatory shear and incomplete creep/recovery experiments were combined to characterize immiscible blends of polypropylene with dispersed droplets of polystyrene. An experimental protocol was defined such that the full creep compliance function could be obtained while minimizing morphological changes. Dynamic experiments were performed to characterize the shorter time relaxation processes, and creep and recovery measurements were used to detect the longer time portions of the relaxation spectra. Extended retardation and relaxation spectra were constructed by combining these data. It was found that using this technique, very long-time relaxation peaks which were inaccessible with dynamic experiments alone could be detected. (C) 2012 The Society of Rheology. [http://dx.doi.org/10.1122/1.4720081] NSERC NSERC Capes CAPES CNPq CNPq FAPESP FAPESP |
| Identificador |
Journal of Rheology, Melville, v. 56, n. 5, pp. 1039-1056, SEP, 2012 0148-6055 http://www.producao.usp.br/handle/BDPI/34030 10.1122/1.4720081 |
| Idioma(s) |
eng |
| Publicador |
JOURNAL RHEOLOGY AMER INST PHYSICS MELVILLE |
| Relação |
JOURNAL OF RHEOLOGY |
| Direitos |
restrictedAccess Copyright JOURNAL RHEOLOGY AMER INST PHYSICS |
| Palavras-Chave | #COMPATIBILIZED POLYMER BLENDS #DISCRETE RETARDATION SPECTRA #SHEAR-FLOW #INTERFACIAL-TENSION #RHEOLOGICAL PROPERTIES #MOLTEN POLYMERS #MORPHOLOGY #RELAXATION #BEHAVIOR #MODEL #MECHANICS |
| Tipo |
article original article publishedVersion |
