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New epoxy thermosets modified with multiarm star poly(lactide) with poly(ethyleneimine) as core of different molecular weight
(2013-08)
Article
Restricted access - publisher's policyMultiarm stars containing a hyperbranched poly(ethyleneimine) core of different molecular weight and poly(lactide) arms were synthesized by cationic ring-opening polymerization of lactide from a hyperbranched poly(ethyleneimine) ... -
Assessment tasks: center of the learning process
(2012-05-01)
Article
Restricted access - publisher's policyAssessment is at the centre of learning process, and is what therefore determinates the process of teaching-learning. It is because of this, the assessment tasks must be designed with several criteria which guarantee its ... -
New catalysts for diglycidyl ether of bisphenol A curing based on thiol-epoxy click reaction
(2014-10-01)
Article
Restricted access - publisher's policyThe thiol-epoxy click reaction has been employed in the curing of diglycidyl ether of bisphenol A (DGEBA) using latent amine precursors in ratios of 0.5 and 2 phr. The kinetics of the curing of mixtures of DGEBA/thiol/amine ... -
Thermal analysis of polymer layered silicate nanocomposites. Identification of nanostructure development by DSC
(2014-11-01)
Article
Restricted access - publisher's policyIt has been shown, for three different polymer layered silicate (PLS) nanocomposite systems, how differential scanning calorimetry (DSC) can identify the different reactions of homopolymerisation and of crosslinking that ... -
Analysis of assessment tools of Engineering degrees
(2014-10-01)
Article
Open AccessThis work presents an analysis of the assessment tools used by professors at the Universitat Politécnica de Catalunya to assess the generic competencies introduced in the Bachelor’s Degrees in Engineering. In order to ... -
New epoxy thermosets modified with amphiphilic multiarm star polymers as toughness enhancer
(2014-10-01)
Article
Restricted access - publisher's policyThe synthesis and characterization of two novel amphiphilic multiarm star polymers with linear polyethylene glycol (PEG) and poly(s-caprolactone) (PCL) arms and their use as toughening modifiers of epoxy anhydride thermosets ... -
Cure kinetics modeling and thermomechanical properties of cycloaliphatic epoxy-anhydride thermosets modified with hyperstar polymers
(2014-09-15)
Article
Restricted access - publisher's policyHyperstar polymers (HSPs) with hyperbranched aromatic polyester core and arms consisting of block copolymers of poly(methyl methacrylate) and poly(hydroxyethyl methacrylate) have been used as polymeric modifiers in ... -
Novel epoxy-silica hybrid coatings by using ethoxysilyl-modified hyperbranched poly(ethyleneimine) with improved scratch resistance
(Elsevier, 2014-09-26)
Article
Restricted access - publisher's policyA new hyperbranched poly(ethyleneimine) with ethoxysilyl groups at the chain ends has been synthesized and characterized and then used in epoxy formulations to generate new organic/inorganic hybrid materials. Formulations ... -
Effect of hydroxyl ended and end-capped multiarm star polymers on the curing process and mechanical characteristics of epoxy/anhydride thermosets
(2014-08-01)
Article
Restricted access - publisher's policyMultiarm star polymers have been synthesized by cationic ring-opening polymerization of epsilon-caprolactone from a hyperbranched poly(ethyleneimine) core and end-capped with acetic anhydride. These star polymers have been ... -
Comparative analysis of stochastic network build-up methods for the curing of epoxy-anhydride thermosets
(2014-04-01)
Article
Restricted access - publisher's policyThe network build-up of epoxy-anhydride thermosets has been studied using two different stochastic network build-up methods based on the random combination of primary chains or simple fragments. Explicit expressions for ... -
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 ... -
A versatile thiol-ene/sol-gel two-stage curing process based on a hyperbranched polyester with different degrees of 10-undecenoyl modification
(2014-04-01)
Article
Restricted access - publisher's policyHybrid thiol-ene system based on a hyperbranched polyester with different degrees of 10-undecenoyl modification are prepared via a dual UV-thermal process. The pristine thiol-ene formulation shows a high reactivity towards ...
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