John Christopher Plummer

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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, 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

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

Multi-material rail pad and method for manufacturing same

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

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

Rosario Scopelliti, John Christopher Plummer, Farzaneh Fadaei Tirani, 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

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

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

Rosario Scopelliti, John Christopher Plummer, Farzaneh Fadaei Tirani, 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 ...