Crosslinking of epoxy-polysiloxane system by reactive blending

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Show simple item record González-González, María Kadlec, Peter Stepanek, Peter Strachota, Adam Matejka, Libor 2013-04-25T14:33:32Z 2013-04-25T14:33:32Z 2004-07-21
dc.identifier.issn 0032-3861
dc.description.abstract (PAMS) containing pendant amino groups and diglycidyl ether of Bisphenol A (DGEBA). The initially immiscible blend is compatibilized during the reaction and crosslinked. Network formation, dynamics of the system and evolution of morphology were determined by dynamic mechanical analysis and light scattering techniques. The grafting epoxy-amine reaction involves a high extent of cyclization resulting in a high fraction of the sol in the networks. Dynamic light scattering data analysis reveals fast and slow relaxation modes of reacting species in the pregel and one single mode in the post-gel state. The network with a stoichiometric composition shows the most homogeneous morphology with a single glass transition temperature. On the contrary, the networks with excess of PAMS are strongly phase-separated exhibiting the unreacted PAMS-rich phase, PAMS phase partly grafted with epoxide and PAMS-DGEBA crosslinked phase.
dc.description.sponsorship The authors acknowledge financial support of the European Commission through a Marie Curie Training Site contract No. HPMT-CT-2001-00396 and of the Grant Agency of Academy of Sciences of the Czech Republic (A4050008).
dc.format.mimetype application/pdf
dc.language.iso eng
dc.publisher Elsevier
dc.rights © Elsevier
dc.subject.other Reactive blending
dc.subject.other Siloxane network
dc.subject.other Epoxy network
dc.title Crosslinking of epoxy-polysiloxane system by reactive blending
dc.type article
dc.description.status Publicado
dc.subject.eciencia Ingeniería Industrial
dc.subject.eciencia Materiales
dc.subject.eciencia Química
dc.identifier.doi 10.1016/j.polymer.2004.05.059
dc.rights.accessRights openAccess
dc.type.version acceptedVersion
dc.identifier.publicationfirstpage 5533
dc.identifier.publicationissue 16
dc.identifier.publicationlastpage 5541
dc.identifier.publicationtitle Polymer
dc.identifier.publicationvolume 45
dc.identifier.uxxi AR/0000011411
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