Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/97
Título: | Relaxation Behavior of Poly(ethylene terephthalate)/Poly(ethylene naphthalene 2,6-dicarboxylate) Blends Prepared by Cryogenic Blending |
Autor(es): | Denchev, Z. Ezquerra, T. A. Nogales, A. Sics, I. Álvarez, C. Broza, G. Schulte, K. |
Palavras-chave: | Blends Copolymerization Interchange reactions Poly(ethylene terephthalate) (PET) Poly(ethylene naphthalene 2,6-dicarboxylate) (PEN) Dielectric spectroscopy Differential scanning calorimetry (DSC) Transesterification |
Data: | 2002 |
Editora: | Wiley |
Revista: | Journal of Polymer Science Part B: Polymer Physics |
Citação: | "Journal of Polymer Science Part B: Polymer Physics". 40:22 (2002) 2570-2578. |
Resumo(s): | A method including cryogenic grinding, melt pressing from the molten state, and quenching was used to prepare blends of poly(ethylene terephthalate) (PET) and poly(ethylene naphthalene 2,6-dicarboxylate) (PEN) in which the two phases were highly dispersed. The effect of melt-pressing times on the thermal properties and relaxation behavior of PET/PEN films were characterized with differential scanning calorimetry and dielectric spectroscopy. For short melt-pressing times, two glasstransition, two crystallization, and two melting peaks were observed, indicating the presence of PET-rich and PEN rich phases in these blends. Longer melt-pressing times revealed a single glass transition and a single _-relaxation process, showing that PET–PEN block copolymers were likely to be formed during the melt pressing. The experimental findings were examined in terms of the transesterification reactions between the blend components, as revealed by 1H NMR measurements. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/97 |
DOI: | 10.1002/polb.10320 |
ISSN: | 0887-6266 |
Arbitragem científica: | yes |
Acesso: | Acesso restrito UMinho |
Aparece nas coleções: | IPC - Artigos em revistas científicas internacionais com arbitragem |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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20.pdf Acesso restrito! | 184,38 kB | Adobe PDF | Ver/Abrir |