%0 Journal Article 
%A Salgado, Cástor
%A Arrieta, Marina Patricia
%A Sessini, Valentina
%A Peponi, Laura
%A García López, Daniel
%A Fernández-García, Marta
%T Functional properties of photo-crosslinkable biodegradable polyurethane nanocomposites
%D 2020
%@ 0141-3910
%U http://hdl.handle.net/10017/43648
%X Smart and functional properties of coumarin and PCL-based polyurethane  (PU) nanocomposites reinforced with both pristine silica nanoparticles  and silica nanoparticles modified with coumarin, have been studied.  Coumarin is a photo-responsive derivative, which induces  photo-crosslinking when it is incorporated in the PU moieties. Swelling  measurements were performed to study the photo-crosslinking fraction and  the results are in concordance with the degree of crosslinking (DC)  calculated by UV measurements. Shape memory behavior was studied by  thermo-mechanical cycles, by measuring the strain recovery and shape  fixity ratios of the photo-crosslinked films. The modification of silica  nanoparticles allows an improvement in the dispersion of the  reinforcements into the PU matrix, which leads to an enhancement of the  shape memory properties. Finally, the materials were disintegrated under  composting conditions at laboratory scale level to confirm their  biodisintegrable behavior.
%K Polyurethane
%K Coumarin
%K Photo-crosslinking
%K Swelling
%K Shape-memory
%K Biodegradable
%K Química
%K Chemistry
%~ Biblioteca Universidad de Alcala