Recherche

Afficher tous les résultats pour

Accueil

Personne

John Christopher Plummer

Cette personne a quitté l’EPFL

À propos
Confidentialité
Mentions légales

Graph Chatbot

Publications associées (95)

Page 1 sur 5

Adsorption of low-molecular-weight molecules on the surface of a sodium smectite clay: an ab initio study

John Christopher Plummer, Wanda Andreoni, Pascal Clausen, Alessandro Curioni

We present a study of the adsorption of single molecules of volatiles, such as water, ethanol, ethyl acetate, pyridine, toluene, and n-octane, on the dry surface of a smectite clay using a series of calculations based on density functional theory. Our clay ...

2009

High-performance polyamides with engineered disorder

Véronique Michaud, John Christopher Plummer, Holger Frauenrath, Nicolas Candau, Sylvain Cyril Claude Galland, Julien Philippe Cretenoud

The extraordinary property profiles of many biological materials derive from their hierarchical structure and control of order and disorder at different length scales. Application of these concepts to the design of synthetic polymers may provide new routes ...

ROYAL SOC CHEMISTRY2021

Cohesion and adhesion of nanoporous TiO2 coatings on titanium wires for photovoltaic applications

Jan-Anders Edvin Maansson, Yves Leterrier, John Christopher Plummer

The working electrode of a dye-sensitized photovoltaic fiber is constituted of a porous TiO2 coated titanium wire. The cohesion and adhesion of such a brittle oxide coating on the ductile metal substrate are identified as crucial factors in maintaining pho ...

Elsevier2008

Metallocene Catalyzed Polyolefins For Improving Thermal And Mechanical Properties Of Bitumen Blends

Jan-Anders Edvin Maansson, John Christopher Plummer, Chiara Spadaro

Bitumen is a complex viscoelastic material used as a binder in applications ranging from road paving to waterproof membranes for roofing [1]. In such applications, bitumen is often blended with a polymer in order to improve its elasticity. The resulting po ...

2010

Water adsorption on a sodium smectite clay surface: an ab initio study

John Christopher Plummer, Pascal Clausen

Using calculations based on density-functional theory, we explore the configurations that water molecules (2,3,4;6) assume on the surface a sodium 2:1 smectite clay with isomorphic substitutions both on octahedral and tetrahedral sheets. The hydrophilicity ...

2009

UV-Cured Cellulose Nanofiber Composites with Moisture Durable Oxygen Barrier Properties

Jan-Anders Edvin Maansson, Yves Leterrier, John Christopher Plummer, Sylvain Cyril Claude Galland, Tommaso Nardi

Nanocomposites based on 10 to 60 vol % cellulose nanofibers (NFC) in a photopolymerizable hyperbranched acrylate matrix were prepared. Unmodified NFC and NFC chemically modified with a silane coupling agent and with ceric ammonium nitrate for direct polyme ...

2014

Amphiphilic multi-arm star-block copolymers for encapsulation of fragrance molecules

Jan-Anders Edvin Maansson, Harm-Anton Klok, John Christopher Plummer, Céline Ternat

Novel amphiphilic multi-arm star-block copolymers with a hyperbranched core, a hydrophobic inner shell, and a hydrophilic outer shell have been prepared from a commercial hyperbranched polyester macroinitiator by ring-opening polymerization of -caprolacton ...

2007

Thermal mending in immiscible poly(epsilon-caprolactone)/epoxy blends

Véronique Michaud, John Christopher Plummer, Amaël Maximilien Cohades, Erica Manfredi

Blends of commercial epoxy monomer with a 4,4'-diaminodiphenylsulfone hardener and poly(epsilon-caprolactone) (PCL) were evaluated for their potential as a self-healing matrix for fiber-reinforced composites, based on their room temperature toughness and s ...

Pergamon-Elsevier Science Ltd2016

Cellulose nanofiber network for moisture stable, strong and ductile biocomposites and increased epoxy curing rate

John Christopher Plummer, Sylvain Cyril Claude Galland

Nanocomposites with high volume fractions (15-50 vol%) of nanofibrillated cellulose (NFC) were prepared by impregnation of a wet porous NFC network with acetone/epoxy/amine solution. Infrared spectroscopy studies revealed a significant increase in curing r ...

Elsevier Sci Ltd2014

Dynamic mechanical analysis for rapid assessment of the time-dependent recovery behavior of shape memory polymers

Jan-Anders Edvin Maansson, John Christopher Plummer, Charly David Azra

Thermally activated shape memory polymers (SMPs) recover from a secondary shape induced by mechanical deformation to a primary equilibrium shape when they are heated to their actuation temperature. In certain applications, for example in the biomedical fie ...

Iop Publishing Ltd2013

Morphology and mechanical properties of isotactic polypropylene glass mat thermoplastic composites modified with organophilic montmorillonite

Jan-Anders Edvin Maansson, John Christopher Plummer, Sara Dalle Vacche, Chrystèle Houphouet-Boigny Favre

Satisfactory impregnation of glass fiber mats may be obtained with isotactic polypropylene/montmorillonite (MMT) nanocomposites under conditions comparable with industrial conditions. However, it is demonstrated here that the high melt viscosity of the nan ...

Springer US2010

Crystallization of polylactide during impregnation with liquid CO2

Jan-Anders Edvin Maansson, John Christopher Plummer

The evolution of the morphology and degree of crystallinity was investigated postmortem in initially amorphous specimens of a commercial poly(dl-lactide) with a relatively low d-lactide content, after different immersion times in liquid CO2 at 10 A degrees ...

Springer Verlag2015

Effect of surface modification of colloidal silica nanoparticles on the rigid amorphous fraction and mechanical properties of amorphous polyurethane-urea-silica nanocomposites

John Christopher Plummer, Nicolas Candau, Oguzhan Oguz

Colloidal silica nanoparticles (NPs) modified with eight different silane coupling agents were incorporated into an amorphous poly(tetramethylene oxide)-based polyurethane-urea copolymer matrix at a concentration of 10 wt % (4.4 vol %) in order to investig ...

2019

Plasticization of polylactide foams for tissue engineering

Jan-Anders Edvin Maansson, John Christopher Plummer, Pierre-Etienne Bourban, Matthieu Cuénoud

Supercritical CO2 foaming of amorphous and semicrystalline polylactides plasticized by blending with 20 wt% polyethylene glycol has been investigated as a means of producing low-stiffness bioresorbable scaffolds for tissue engineering. For a given set of f ...

SAGE Publications2012

Dynamic properties of sandwich structures with integrated shear-thickening fluids

Jan-Anders Edvin Maansson, Véronique Michaud, Pierre-Etienne Bourban, John Christopher Plummer, Christian Fischer

The integration of shear-thickening fluids (STFs) into composite structures has been investigated with the aim of tuning part stiffness and damping capacity under dynamic deformation. Results from oscillatory rheological measurements for a STF based on con ...

2006

Morphological investigation of polylactide/microfibrillated cellulose composites

Jan-Anders Edvin Maansson, Pierre-Etienne Bourban, John Christopher Plummer, Carole Boissard

Optical microscopy and transmission electron microscopy have been used to investigate the morphology of polylactide (PLA)/microfibrillated cellulose (MFC) composites prepared by: compression molding of wet-comingled MFC and PLA latex or powder, twin-screw ...

Springer Berlin Heidelberg2013

The Influence of Arginine on the Response of Enamel Matrix Derivative (EMD) Proteins to Thermal Stress: Towards Improving the Stability of EMD-Based Products

Jan-Anders Edvin Maansson, John Christopher Plummer, Matteo Gregorio Modesto Marascio, Raffaele Mezzenga, Alessandra Apicella

In a current procedure for periodontal tissue regeneration, enamel matrix derivative (EMD), which is the active component, is mixed with a propylene glycol alginate (PGA) gel carrier and applied directly to the periodontal defect. Exposure of EMD to physio ...

Public Library Science2015

Hybrid glass fiber-reinforced thermoplastic nanocomposites

Jan-Anders Edvin Maansson, John Christopher Plummer, Martyn Douglas Wakeman, Chrystèle Houphouet-Boigny Favre

The feasibility of integrating thermoplastic isotactic polypropylene/ montmorillonite nanocomposite matrices into conventional fiber-reinforced composites has been investigated. Two basic processing routes were considered: long glass fiber (GF)-reinforced ...

2008

Accelerated ageing and degradation in poly-L-lactide/hydroxyapatite nanocomposites

Jan-Anders Edvin Maansson, Pierre-Etienne Bourban, John Christopher Plummer, Claire Diane Delabarde

Dry, compression molded films of medical grade poly-L-lactide (PLLA) showed a marked reduction in tensile strength and strain after accelerated ageing in aqueous NaOH at 50 degrees C. accompanied by mass loss, surface erosion, increased hydrophilicity and, ...

Elsevier2011

High-temperature copolyamides obtained by the efficient transamidation of crystalline-crystalline polyamide blends

Véronique Michaud, John Christopher Plummer, Holger Frauenrath, Sylvain Cyril Claude Galland

High-performance thermoplastic composites based on semiaromatic polyamides are prime candidates for metal replacement in lightweight structural applications. However, the low ductility and toughness of semiaromatic polyamides remain major obstacles to thei ...

Wiley-Blackwell2017