Browsing by Author "Román Concha, Frida Rosario"
Now showing items 1-19 of 19
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A new epoxy-based layered silicate nanocomposite using a hyperbranched polymer: study of the curing reaction and nanostructure development
(2014-03-01)
Article
Open AccessPolymer layered silicate (PLS) nanocomposites have been prepared with diglycidyl ether of bisphenol-A (DGEBA) epoxy resin as the matrix and organically modified montmorillonite (MMT) as the clay nanofiller. Resin-clay ... -
Achieving high thermal conductivity in epoxy composites: Effect of boron nitride particle size and matrix-filler interface
(Multidisciplinary Digital Publishing Institute (MDPI), 2019-07-06)
Article
Open AccessFor the thermal management of high watt density circuit layers, it is common to use a filled epoxy system to provide an electrically insulating but thermally conducting bond to a metal substrate. An epoxy-thiol system ... -
Densification: A route towards enhanced thermal conductivity of epoxy composites
(Multidisciplinary Digital Publishing Institute (MDPI), 2021-01)
Article
Open AccessWhen an amorphous polymer is cooled under pressure from above its glass transition temperature to room temperature, and then the pressure is released, this results in a densified state of the glass. This procedure applied ... -
Epoxy composites filled with boron nitride and aluminum nitride for improved thermal conductivity
(2017-03-03)
Article
Restricted access - publisher's policyEpoxy composites containing boron nitride (BN) or aluminum nitride (AlN or Al2N3) particles have been studied with a view to obtaining increased thermal conductivity. The effect of these fillers on the cure reaction has ... -
Epoxy composites filled with boron nitride: cure kinetics and the effect of particle shape on the thermal conductivity
(Springer, 2020-05-25)
Article
Open AccessThermally conducting and electrically insulating materials have been prepared by filling an epoxy–thiol system with boron nitride (BN) particles of different shapes (platelets and agglomerates) and sizes (from 2 to 180 ... -
Epoxy-thiol systems filled with boron nitride for high thermal conductivity applications
(2018-03-20)
Article
Open AccessAn epoxy-thiol system filled with boron nitride (BN), in the form of 80 µm agglomerates, has been investigated with a view to achieving enhanced thermal conductivity. The effect of BN content on the cure reaction kinetics ... -
EXPERIMENTACIO EN ENGINYERIA QUIMICA 1 (Examen 2n Quadr.)
(Universitat Politècnica de Catalunya, 2004-04-13)
Exam
Restricted access to the UPC academic community -
Identification of nanostructural development in epoxy polymer layered silicate nanocomposites from the interpretation of differential scanning calorimetry and dielectric spectroscopy
(2012-05-08)
Article
Open AccessThe effect of nanoclay on the non-isothermal cure kinetics of polymer layered silicate nanocomposites based upon epoxy resin is studied by calorimetric techniques (DSC and TGA) and by dielectric relaxation spectroscopy ... -
Isothermal curing of polymer layered silicate nanocomposites based upon epoxy resin by means of anionic homopolymerisation
(2013-12-20)
Article
Restricted access - publisher's policyThe use of an initiator, 4-(dimethylamino) pyridine (DMAP), to promote an anionic homopolymerisation reaction for the isothermal cure of polymer layered silicate (PLS) nanocomposites based on an epoxy resin, as well as the ... -
Molecular mobility in hyperbranched polymers and their interaction with an epoxy matrix
(2016-03-01)
Article
Open AccessThe molecular mobility related to the glass transition and secondary relaxations in a hyperbranched polyethyleneimine, HBPEI, and its relaxation behaviour when incorporated into an epoxy resin matrix are investigated by ... -
Remarkable Thermal Conductivity of Epoxy Composites Filled with Boron Nitride and Cured under Pressure
(Multidisciplinary Digital Publishing Institute (MDPI), 2021-03)
Article
Open AccessThis work demonstrates that the application of even moderate pressures during cure can result in a remarkable enhancement of the thermal conductivity of composites of epoxy and boron nitride (BN). Two systems have been ... -
Study of hyperbranched poly(ethyleneimine) polymers of different molecular weight and their interaction with epoxy resin
(2018-03-09)
Article
Open AccessTwo different commercial hyperbranched poly(ethyleneimine)s (HBPEI), with molecular weights (MW) of 800 and 25,000 g/mol, and denoted as PEI800 and PEI25000, respectively, as well as the mixtures with a Diglycidyl Ether ... -
Study of the molecular dynamics of multiarm star polymers with a poly(ethyleneimine) core and poly(lactide) multiarms
(2017-02-04)
Article
Open AccessMultiarm star polymers, denoted PEIx-PLAy and containing a hyperbranched poly(ethyleneimine) (PEI) core of different molecular weights x and poly(lactide) (PLA) arms with y ratio of lactide repeat units to N links were ... -
TECNOLOGIA DE LA POLIMERITZACIO (Examen 2n Quadr.)
(Universitat Politècnica de Catalunya, 2004-04-16)
Exam
Restricted access to the UPC academic community -
TECNOLOGIA DELS POLÍMERS (Examen 1r Quadr.)
(Universitat Politècnica de Catalunya, 2005-01-11)
Exam
Restricted access to the UPC academic community -
TECNOLOGIA DELS POLÍMERS (Examen 1r Quadr.)
(Universitat Politècnica de Catalunya, 2004-10-29)
Exam
Restricted access to the UPC academic community -
Termodinàmica : pràctiques de laboratori
(Universitat Politècnica de Catalunya, 2016)
Practice
Open Access -
The surface modification of boron nitride particles
(Springer, 2019-01-01)
Article
Open AccessThe use of coupling agents to enhance the thermal conductivity of composites of epoxy and boron nitride (BN) has been investigated. Two types of BN particles, lightly aggregated platelets with an average size of 6 µm and ... -
Thermal and oxidative degradation of epoxy based layered silicate nanocomposites
(2009)
Conference lecture
Restricted access - publisher's policyThe thermal oxidative degradation of several polymer/clay nanocomposites with a range of clay contents has been determined. It is found that the dispersion of the clay in the resin matrix plays a crucial role in the ...
