Analysis of non-covalent interactions between the nanoparticulate fillers and the matrix polymer as applied to shape memory performance

 

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Detalles Bibliográficos
Autores: Sedat Gunes, I, Perez Bolivar, Cesar, Cao, Feina, Jimenez, Guillermo A., Anzenbacher, Pavel, Sadhan, Jana
Formato: artículo
Fecha de Publicación:2010
Descripción:Non-covalent interactions between filler particles and polyurethanes were investigated using fluorescence emission spectroscopy. The results were used in the analysis of shape memory (SM) performance of polyurethanes. Composites of shape memory polyurethane (SMPU) and carbon nanofiber (CNF), oxidized carbon nanofiber (ox-CNF), organoclay, silicon carbide, and carbon black were prepared from diphenylmethane diisocyanate, 1,4-butanediol, and poly(caprolactone)diol. It was revealed by fluorescence emission spectroscopy that primarily the urethane groups located in the hard segments of SMPU interacted with the polar functional groups on filler particles. A close correlation between the extent of non-covalent filler-matrix interactions, soft segment crystallinity, and SM properties of polyurethane composites was discussed. It was observed that weak non-covalent interactions of polymer chains with CNF and SiC particles caused significant reductions in soft segment crystallinity of SMPU and hence the shape memory properties of the composites. © The Royal Society of Chemistry 2010.
País:Repositorio UNA
Institución:Universidad Nacional de Costa Rica
Repositorio:Repositorio UNA
Lenguaje:Inglés
OAI Identifier:oai:null:11056/22809
Acceso en línea:http://hdl.handle.net/11056/22809
https://doi.org/10.1039/b922027e
Palabra clave:ESPECTROSCOPÍA
POLIURETANO
POLIMEROS
FLUORESCENCIA
SPECTROSCOPY
POLYMERS
FLUOROSCENCE