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John Christopher Plummer

Cette personne a quitté l’EPFL

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Publications associées (95)

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NMR diffusion and relaxation studies of the encapsulation of fragrances by amphiphilic multiarm star block copolymers

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

Self-diffusion NMR spectroscopy and relaxometry have been employed to study fragrance encapsulation in water-soluble, amphiphilic star block copolymers. Diffusion coefficients of four different fragrance molecules in the free form and in the presence of th ...

American Chemical Society2007

Loss of tensile strength in cellulose tissue on the surface of spruce (Picea abies) caused by natural photodegradation and delignification

John Christopher Plummer

Photodegradation of wood leads to discolouration and delignification, inducing damage to the cellular structure. This study is an investigation of the damage and loss of tensile strength of the cellulose fibres in spruce (Picea abies). Microtensile tests i ...

Elsevier2013

Microdeformation mechanisms in rubber toughened PMMA and PMMA-based copolymers

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

The classical method of toughening polymethylmethacrylate (PMMA) is to incorporate composite rubber particles into the homopolymer matrix. This approach has been extended in the present work by (i) combining rubber toughening with chemical modification of ...

2006

Solidification behavior of PLLA/nHA nanocomposites

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

As part of a broader effort to establish processing-structure-property relationships in PLLA/nHA, which is currently under consideration for bioresorbable scaffolds for bone repair, hot stage optical microscopy and differential scanning calorimetry have be ...

2010

Isothermal recovery rates in shape memory polyurethanes

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

This work compares the time dependence of isothermal shape recovery in thermoset and thermoplastic shape memory polyurethanes (SMPUs) with comparable glass transition temperatures. In each case, tensile tests have been used to quantify the influence of var ...

2011

Polyamide material

John Christopher Plummer, Holger Frauenrath, Nicolas Candau, Sylvain Cyril Claude Galland

The invention relates to a polyamide material containing a polyamide as the matrix polyamide and fibrillar polyamide particles, wherein at least 10 vol.% of the fibrillar polyamide particles, based on the total volume of the fibrillar polyamide particles, ...

2018

Composition containing a polymer and an additive

John Christopher Plummer, Holger Frauenrath, Daniel Görl

The invention describes a composition containing a) a functionalized polymer (10) that comprises at least one polymer segment (13) and at least two polymer aggregating segments (11,12) capable of forming non-covalent bonds based on a supramolecular interac ...

2019

Processing of Hybrid Glass-Fibre Reinforced Thermoplastic Nanocomposites

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

The aim of this work is to integrate polypropylene/montmorillonite (MMT) nanocomposite matrices into conventional fibre-reinforced composites. Two types of composite have been considered: long fibre-reinforced composites from co-woven glass fibre and nanoc ...

2005

Polymer-bridged Nanofibrils in a High-molar-mass Polyester via Co-assembly of Benzenetricarboxamide End Groups and an Additive

John Christopher Plummer, Holger Frauenrath, Daniel Görl, Sophia Thiele, Michael Alan Giffin, Matthieu Claude Wendling

Benzenetricarboxamide (BTA) derivatives are versatile compounds widely employed as nucleating agents in commercial semicrystalline plastics and as supramolecular ligands in self-assembling telechelic polymer-based organogels, hydrogels, and bulk elastomers ...

ROYAL SOC CHEMISTRY2025

Thermoplastic Toughening of a Semiaromatic Polyamide with an Amino-telechelic Polyethylene

John Christopher Plummer, Holger Frauenrath, Michael Alan Giffin

Semiaromatic polyamides are used for metal replacementin advancedengineering applications to reduce weight and improve efficiency,but their range of application is limited by their inherent lack ofductility and toughness. Here, we combined semiaromatic pol ...

AMER CHEMICAL SOC2023

Enhanced ductility in high performance polyamides due to strain-induced phase transitions

Véronique Michaud, John Christopher Plummer, Holger Frauenrath, Pascal Alexander Schouwink, Nicolas Candau

Copolymerizing poly(hexamethylene terephthalamide-co-isophthalamide) (PA6TI) with 40 wt% polyamide 66 (PA66) results in only minor decreases in modulus and yield stress owing to isomorphous substitution of PA6TI units by PA66 units in the PA6TI alpha phase ...

ELSEVIER SCI LTD2022

Fracture mechanisms in polystyrene/laponite nanocomposites prepared by emulsion polymerization

Jan-Anders Edvin Maansson, John Christopher Plummer

Transmission electron microscopy (TEM) has been used to investigate the effect of laponite clay on microdeformation in thin latex-based polystyrene (PS) films, in which the laponite was concentrated at the original interfaces between the PS particles. At r ...

2009

Damping of thermoset and thermoplastic flax fibre composites

Jan-Anders Edvin Maansson, Pierre-Etienne Bourban, John Christopher Plummer, Fabien Duc

The mechanical and damping properties of unidirectional (UD) and twill 2/2 flax fibre (FF) reinforced thermoset (epoxy) and thermoplastic (polypropylene (PP) and polylactic acid (PLA)) composites containing 40 vol% of fibres have been compared with those o ...

Elsevier Sci Ltd2014

The morphology of submicronsized core–shell latex particles: An electron microscopy study

Pierre Stadelmann, John Christopher Plummer

The core–shell structure of a range of acrylic–acrylic latexes has been investigated by combining different specimen preparation methods with transmission electron microscopy (TEM), dark-field scanning transmission electron microscopy (DSTEM) and low-volta ...

2007

Testing of Polymeric Materials

John Christopher Plummer

The present article reviews basic techniques widely used for fundamental research, as well as in the plastics and composites industries, for the characterization of polymer-based materials destined for bulk applications, such as packaging, construction, tr ...

Elsevier2014

Influence of molecular architecture on the isothermal time-dependent response of amorphous shape memory polyurethanes

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

The thermomechanical response of a series of thermally activated shape memory polyurethanes (SMPUs), determined by dynamic mechanical analysis (DMA), has been adjusted by systematic modification of the molecular architecture. It is argued that the free rec ...

Elsevier2013

Thermal and dynamic mechanical properties of blends of bitumen with metallocene catalyzed polyolefins

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

A high penetration grade bitumen has been blended with up to 50 wt% of two different grades of metallocene catalyzed linear low density polyethylene (m-LLDPE) in order to investigate the potential of these and similar copolymers as a substitute for styrene ...

Springer US2011

Cellular biocomposites from polylactide and microfibrillated cellulose

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

This paper describes the production of "green" microfibrillated cellulose-reinforced polylactide cellular biocomposites using a wet mixing technique combined with super-critical carbon dioxide foaming. The effect of composition on the morphology, density a ...

SAGE Publications2012

Towards Textile-Based Fiber Reinforced Thermoplastic Nanocomposites: Melt Spun Polypropylene-Montmorillonite Nanocomposite Fibers

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

The present work is aimed at assessing the feasibility of integrating thermoplastic polypropylene nanocomposite matrices into conventional fiber-reinforced composites based on hybrid textiles that incorporate both the matrix and glass-fiber yarns, in order ...

2007

Influence of processing routes on morphology and low strain stiffness of polymer/nanofibrillated cellulose composites

Jan-Anders Edvin Maansson, Yves Leterrier, Pierre-Etienne Bourban, John Christopher Plummer, Sylvain Cyril Claude Galland

The morphology of polymer/nanofibrillated cellulose (NFC) composite sheets produced using different techniques and its influence on low strain stiffness were assessed by optical and transmission electron microscopy. Solvent processing led to relatively hom ...

Maney Publishing2015