Publications de John Christopher Plummer

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, Michael Alan Giffin

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

Dynamics of hydrogen-bonded end groups in bulk polymers revealed by solid-state NMR spectroscopy relaxation dispersion experiments

John Christopher Plummer, Holger Frauenrath, Laura Piveteau

The dynamic nature of supramolecular networks of telechelic polymers offers new avenues for the design of novel materials with enhanced melt strength and extensibility, increased energy at break, or self-healing properties. However, monitoring the kinetics ...

2025

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

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

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

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

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

John Christopher Plummer, Véronique Michaud, 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

Multi-material rail pad and method for manufacturing same

Joël Cugnoni, John Christopher Plummer, Véronique Michaud, Holger Frauenrath, Adrien Julien Demongeot, Oguzhan Oguz

The invention relates to a rail pad (10, lOa-v, 10α-η) comprising: a) a pad matrix (1) comprising a first material and b) at least one damping element (2) at least partially encapsulated or embedded in the pad matrix (1), said damping element (2) comprisin ...

2022

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

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

High-performance polyamides with engineered disorder

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

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

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

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

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

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

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

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, Stéphane Henri Florian Bernhard, 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

Polyamide material

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

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

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

John Christopher Plummer, Véronique Michaud, 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

Scaffold requirements for periodontal regeneration with enamel matrix derivative proteins

John Christopher Plummer, Laurent Mirko Dejace, Peter Fischer, Alessandra Apicella, Matteo Gregorio Modesto Marascio

Periodontitis affects the attachment of natural teeth, and infection or inflammation associated with periodontitis may affect peri-implant tissues. Enamel matrix derivative (EMD) proteins provide stimulation for self-regeneration of the damaged tissue when ...

Elsevier Science Bv2017

Molecular dynamics simulations of the intrinsically disordered protein amelogenin

John Christopher Plummer, Alessandra Apicella, Matteo Gregorio Modesto Marascio, Vincenzo Colangelo

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

Liquid CO2 processing of solid polylactide foam precursors

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

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

John Christopher Plummer, Véronique Michaud, 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

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

John Christopher Plummer, Raffaele Mezzenga, Peter Fischer, Alessandra Apicella, Matteo Gregorio Modesto Marascio

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

Solid heat-expandable polylactide-poly(methyl methacrylate) foam precursors prepared by immersion in liquid carbon dioxide

John Christopher Plummer, Yonghoon Yoon

Solid heat-expandable foam precursors were prepared by impregnating melt-blended poly(d,l-lactide) (PDLLA)-poly(methyl methacrylate) (PMMA) blends with liquid carbon dioxide (CO2). The phase behavior of these blends was strongly dependent on the processing ...

Springer2015