Characterization of castor oil based polyurethane films prepared with N-methyl-2-pyrrolidinone as a solvent
| Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
|---|---|
| Data(s) |
20/05/2014
20/05/2014
15/10/2005
|
| Resumo |
Molecular mobility in castor oil based polyurethane was investigated with thermally stimulated depolarization current (TSDC) measurements and alternating-current (ac) dielectric relaxation spectroscopy. Three peaks could be observed in TSDC thermograms from 173 to 373 K. The relaxation located at 213 K could be attributed to the change in the molecular chain due to the interaction between the isocyanate and the solvent, and it was well fitted with the Vogel-Fulcher-Tammann equation. The other two peaks were located at 274 and 365 K and could be attributed to interfacial polarization and space charge, respectively. (c) 2005 Wiley Periodicals, Inc. |
| Formato |
746-749 |
| Identificador |
http://dx.doi.org/10.1002/app.22103 Journal of Applied Polymer Science. Hoboken: John Wiley & Sons Inc., v. 98, n. 2, p. 746-749, 2005. 0021-8995 http://hdl.handle.net/11449/9959 10.1002/app.22103 WOS:000231680500027 |
| Idioma(s) |
eng |
| Publicador |
Wiley-Blackwell |
| Relação |
Journal of Applied Polymer Science |
| Direitos |
closedAccess |
| Palavras-Chave | #glass transition #polyurethanes #dielectric properties |
| Tipo |
info:eu-repo/semantics/article |
