Publication:
Determination of the linear coefficient of thermal expansion in polymer films at the nanoscale: influence of the composition of EVA copolymers and the molecular weight of PMMA

Simple item page
dc.affiliation.dptoUC3M. Departamento de Ciencia e Ingeniería de Materiales e Ingeniería Químicaes
dc.affiliation.grupoinvUC3M. Grupo de Investigación: Materiales compuestos poliméricos e interfaseses
dc.contributor.authorGonzález Benito, Francisco Javier
dc.contributor.authorCastillo, E.
dc.contributor.authorCruz Caldito, J. F.
dc.contributor.funderMinisterio de Ciencia e Innovación (España)es
dc.contributor.funderMinisterio de Economía y Competitividad (España)es
dc.date.accessioned2020-11-17T13:09:21Z
dc.date.available2020-11-17T13:09:21Z
dc.date.issued2015-01-01
dc.description.abstractNanothermal-expansion of poly(ethylene-co-vinylacetate), EVA, and poly(methyl methacrylate), PMMA, in the form of films was measured to finally obtain linear coefficients of thermal expansion, CTEs. The simple deflection of a cantilever in an atomic force microscope, AFM, was used to monitor thermal expansions at the nanoscale. The influences of: (a) the structure of EVA in terms of its composition (vinylacetate content) and (b) the size of PMMA chains in terms of the molecular weight were studied. To carry out this, several polymer samples were used, EVA copolymers with different weight percents of the vinylacetate comonomer (12, 18, 25 and 40%) and PMMA polymers with different weight average molecular weights (33.9, 64.8, 75.600 and 360.0 kg mol(-1)). The dependencies of the vinyl acetate weight fraction of EVA and the molecular weight of PMMA on their corresponding CTEs were analyzed to finally explain them using new, intuitive and very simple models based on the rule of mixtures. In the case of EVA copolymers a simple equation considering the weighted contributions of each comonomer was enough to estimate the final CTE above the glass transition temperature. On the other hand, when the molecular weight dependence is considered the free volume concept was used as novelty. The expansion of PMMA, at least at the nanoscale, was well and easily described by the sum of the weighted contributions of the occupied and free volumes, respectively.en
dc.description.sponsorshipAuthors gratefully acknowledge financial support of the Ministerio de Ciencia e Innovación (MAT2010-16815) y Ministerio de Economía y Competitividad (MAT2014-59116C2-1-R)en
dc.identifier.bibliographicCitationGonzález-Benito, J., Castillo, E. and Cruz-Caldito, J.F (2015). Determination of the linear coefficient of thermal expansion in polymer films at the nanoscale: influence of the composition of EVA copolymers and the molecular weight of PMMA. Phys. Chem. Chem. Phys., 2015,17, 18495-18500en
dc.identifier.doihttps://doi.org/10.1039/c5cp02384j
dc.identifier.issn1463-9076
dc.identifier.publicationfirstpage18495
dc.identifier.publicationissue28
dc.identifier.publicationlastpage18500
dc.identifier.publicationtitlePhyscial Chemistry Chemical Physics
dc.identifier.publicationvolume17
dc.identifier.urihttps://hdl.handle.net/10016/31434
dc.identifier.uxxiAR/0000017144
dc.language.isoeng
dc.publisherRoyal Society of Chemistry
dc.relation.projectIDGobierno de España. MAT2010-16815
dc.relation.projectIDGobierno de España. MAT2014-59116C2-1-R
dc.rights© The Royal Society of Chemistry
dc.rights.accessRightsopen access
dc.subject.ecienciaMaterialeses
dc.titleDetermination of the linear coefficient of thermal expansion in polymer films at the nanoscale: influence of the composition of EVA copolymers and the molecular weight of PMMAen
dc.typeresearch article*
dc.type.hasVersionAM*
dspace.entity.typePublication
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
determination_PCCP_2015_ps.pdf
Size:
726.86 KB
Format:
Adobe Portable Document Format
Download
Collections
DCIMIQ - CIMIQ - MCPI - Artículos de Revistas