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John Christopher Plummer

Cette personne a quitté l’EPFL

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Publications associées (95)

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Engineering polymers with improved charge transport properties from bithiophene-containing polyamides

Rosario Scopelliti, Farzaneh Fadaei Tirani, John Christopher Plummer, Holger Frauenrath, Nicolas Candau, Bilal Özen

Polymer semiconductors show unique combinations of mechanical and optoelectronic properties that strongly depend on their microstructure and morphology. Here, we have used a model pi-conjugated bithiophene repeat unit to incorporate optoelectronic function ...

Royal Society of Chemistry2020

Deformation and fracture in isotactic polypropylene glass mat thermoplastic composites modified with montmorillonite clay

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 ...

2008

Investigation of the Release of Bioactive Volatiles from Amphiphilic Multiarm Star-Block Copolymers by Thermogravimetry and Dynamic Headspace Analysis

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

Amphiphilic multiarm star-block copolymers with a hydrophobic inner and a hydrophilic outer shell have been used to encapsulate hydrophobic bioactive volatiles in aqueous media under realistic application conditions. The release rates of the bioactive comp ...

American Chemical Society2008

Evaporation kinetics of volatile liquids and release kinetics of water from a smectite clay: Comparison between experiments and finite element calculations

Jan-Anders Edvin Maansson, John Christopher Plummer, Pascal Clausen

Numerical calculations of the evaporation kinetics of bulk volatile liquids and of water from smectite clay granules are compared with experimental results. The weight loss of the volatiles is analyzed by thermogravimetry and differential calorimetry. Unde ...

2011

Small strain mechanical properties of latex-based acrylic nanocomposite films

Jan-Anders Edvin Maansson, John Christopher Plummer

A waterborne latex-based technique has been used to prepare acrylic films with laponite contents up to about 25 vol%. The laponite was attached to the surfaces of the latex particles, giving a cellular arrangement of laponite-rich regions at high laponite ...

2011

Plasticization of poly-L-lactide for tissue engineering

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

Plasticization of medical grade poly-L-lactide (PLLA) by addition of polyethylene glycol (PEG) with various molar masses has been evaluated as means of producing low stiffness matrices for bioresorbable scaffolds for soft-tissue engineering applications. A ...

Wiley-Blackwell2011

Semiaromatic Polyamides with Re-Entrant Chain Folding Templated by "U-Turn" Repeat Units

Rosario Scopelliti, Farzaneh Fadaei Tirani, John Christopher Plummer, Holger Frauenrath, Bilal Özen, Julien Philippe Cretenoud, Michael Alan Giffin

Biopolymers often show deterministic chain folding templated by repeat unit sequences whose conformations are locked in by intramolecular interactions. In this work, we have used repeat units based on rigid anthracene or acridine scaffolds, which we refer ...

American Chemical Society2021

Semiaromatic polyamides with enhanced charge carrier mobility

John Christopher Plummer, Holger Frauenrath, Nicolas Candau

The control of local order in polymer semiconductors using non-covalent interactions may be used to engineer materials with interesting combinations of mechanical and optoelectronic properties. To investigate the possibility of preparing n-type polymer sem ...

ROYAL SOC CHEMISTRY2021

Molecular dynamics simulations of the intrinsically disordered protein amelogenin

John Christopher Plummer, Matteo Gregorio Modesto Marascio, Alessandra Apicella

Amelogenin refers to a class of intrinsically disordered proteins that are the major constituents of enamel matrix derivative (EMD), an extract of porcine fetal teeth used in regenerative periodontal therapy. Modifications in molecular conformation induced ...

Taylor & Francis Inc2017

Influence of composition on the morphology of polyurethane/acrylic latex particles and adhesive films

John Christopher Plummer

Polyurethane (PU)/acrylic hybrid particles with different PU contents were synthesized by miniemulsion polymerization and subsequently dried to give solid adhesive films. The morphologies of the particles and the morphologies and mechanical properties of t ...

Elsevier2014

Kinetics Of Desorption Of Water, Ethanol, Ethyl Acetate, And Toluene From A Montmorillonite

Jan-Anders Edvin Maansson, John Christopher Plummer, Pascal Clausen

Desorption processes of low-molecular-weight compounds from the surface of smectites into the gas phase determine a number of processes, e.g. those involved in drug delivery and the release of herbicides. The desorption has not been investigated thoroughly ...

Clay Minerals Soc2013

Frequency dependent dielectric and mechanical behaviour of elastomers for actuator applications

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

The low frequency mechanical and dielectric behavior of three different elastomers has been investigated by dynamic mechanical analysis and dielectric spectroscopy, with the aim of accounting for the frequency dependence of the characteristics of the corre ...

American Institute of Physics2009

All-polyamide nanofibrillar composites by in situ fibrillation of aramid fibers

John Christopher Plummer, Holger Frauenrath, Pascal Alexander Schouwink, Nicolas Candau, Oguzhan Oguz, Sylvain Cyril Claude Galland

All-polyamide composites containing up to 30 vol% highly dispersed PPTA nanofibrils with diameters in the range 50-500 nm were prepared by melt-compounding polyamide 6,10 (PA610) with chopped poly(p-phenylene terephthalamide) (PPTA) fibers in the temperatu ...

Elsevier Sci Ltd2023

Dynamic Properties of Materials for Alpine Skis

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

The aim of the present research has been to quantify the influence of different materials on the global dynamic response of a ski. The properties of the individual constituent materials were characterized as a function of temperature and frequency using dy ...

Springer2006

Hybrid glass mat reinforced polypropylene-montmorillonite nanocomposites

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

Although addition of montmorillonite (MMT) clay to isotactic polypropylene (iPP) results in large increases in the melt viscosity at low shear rates, satisfactory impregnation of glass mats is obtained with iPP/MMT under conditions typical of industrial pr ...

Trans Tech Publications Ltd, Laublsrutistr 24, Ch-8717 Stafa-Zurich, Switzerland2009

Pre- and Post-Transition Behavior of Shear Thickening Fluids in oscillating Shear

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

The dynamic shear-thickening behavior of concentrated colloidal suspensions of fumed silica in polypropylene glycol has been investigated. Dynamic frequency sweeps showed that, for any given solids concentration, the complex viscosity at different imposed ...

Springer-Verlag2007

Liquid CO2 processing of solid polylactide foam precursors

Jan-Anders Edvin Maansson, John Christopher Plummer, Yonghoon Yoon

Diffusion of CO2 in polylactide was modelled by assuming the diffusion coefficient to depend on CO2 concentration, c, according to D[c]=D[0]exp[Ac], where D[0] and A are empirical constants, with the aim of optimizing impregnation of nominally amorphous an ...

Sage Publications Ltd2016

Water-soluble, unimolecular containers based on amphiphilic multiarm star block copolymers

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

A new class of water-soluble, amphiphilic star block copolymers with a large number of arms was prepared by sequential atom transfer radical polymerization (ATRP) of n-butyl methacrylate (BMA) and poly-(ethylene glycol) methyl ether methacrylate (PEGMA). A ...

American Chemical Society2006

Equilibrium desorption isotherms of water, ethanol, ethyl acetate and toluene on a sodium smectite clay

Jan-Anders Edvin Maansson, John Christopher Plummer, Pascal Clausen

Desorption isotherms for water, ethanol, ethyl acetate and toluene from a sodium smectite clay have been determined by both dynamic vapor sorption (DVS) measurements and Knudsen thermogravimetry (KTGA), at the exception of toluene that was measured only by ...

Springer Netherlands2009

The Influence of Matrix Modification on Fracture Mechanisms in Rubber Toughened Polymethylmethacrylate

Jan-Anders Edvin Maansson, John Christopher Plummer, Laure Dupuits Lalande

The fracture behavior of composite rubber particle-toughened polymethylmethacrylate has been investigated over a wide range of test speeds, encompassing impact conditions. When the entanglement density of the matrix was increased and its glass transition t ...

2006