Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/86950
Título: | Deformation and relaxation of PMMA/PS and PMMA/PSOX blends |
Autor(es): | Silva, J. M. Machado, A. V. Moldenaers, P. Maia, J. M. |
Palavras-chave: | Polymer blends Interface PMMA/PS blends stress relaxation |
Data: | Jan-2008 |
Editora: | American Institute of Physics |
Revista: | AIP Conference Proceedings |
Citação: | Silva, J. M., Machado, A. V., Moldenaers, P., Maia, J. M., Co, A., Leal, G. L., … Giacomin, A. J. (2008). Deformation and Relaxation of PMMA∕PS and PMMA∕PSOX blends. AIP Conference Proceedings. AIP. http://doi.org/10.1063/1.2964877 |
Resumo(s): | In this work we study the role of the interfaces in the rheological behavior of blends of PMMA with PS and PS functionalized with oxazoline (PSOX). The blends here studied are concentrated (20 w% of dispersed phase) and have viscosity ratios higher than 1. Linear and non-linear (both in shear and extension) experiments were performed. In terms of relaxation, the cessation of flow after steady shear experiments reveal the appearance of second very slow relaxation mechanism in the PMMA/PSOX blend as do those upon cessation of a step uniaxial extension. Small Angle Light Scattering (SALS), performed on 1 w% dispersed phase blends, was used during step shear to infer about the relaxation of the droplets and/or interface and the patterns show that this behavior is not due to a higher deformation of the PSOX droplets, but should be attributed to a relaxation of the interfaces. The reason for the very high elasticity of the interface is not a priori obvious, but is probably related with the existence of extra physical entanglements at the interface in the PMMA/PSOX blends since the chemical analysis does not indicate any type of chemical interaction between the oxazoline groups and the PMMA. |
Tipo: | Artigo em ata de conferência |
URI: | https://hdl.handle.net/1822/86950 |
ISBN: | 9780735405493 |
DOI: | 10.1063/1.2964877 |
ISSN: | 0094-243X |
e-ISSN: | 1551-7616 |
Versão da editora: | https://pubs.aip.org/aip/acp/article/1027/1/872/808199/Deformation-and-Relaxation-of-PMMA-PS-and-PMMA |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | IPC - Resumos alargados em actas de encontros científicos internacionais com arbitragem |