Covalent adaptable networks

: from dynamic bonds to sustainable composites

Abstract

In this thesis, covalent adaptable networks (CANs) are investigated as novel matrices for fibre-reinforced polymer composites (FRPs). A new generation of previously reported Diels-Alder epoxies are prepared and extensively characterised (Chapter 2). These materials are then used to prepare GFRP laminates via a vacuum-assisted compression moulding technique, imbuing them with functionality courtesy of the intrinsic dynamic chemistry (Chapter 3). These composites are characterised and tested in terms of healing and recycling with a view to creating more sustainable composites. Two additional sub-projects concerning diselenides (Chapter 4) and diphosphanes (Chapter 5) are also investigated to explore the viability of these dynamic chemistries as more reactive alternatives to disulfides (in CANs). Chemical synthesis and mechanistic investigations dominate both of these chapters, although some preliminary investigations concerning new diselenide-containing polymers are introduced in the former.

Date of Award	28 Sept 2021
Original language	English
Awarding Institution	University of Bristol
Supervisor	Paul Pringle (Supervisor) & Ian P Bond (Supervisor)