Enhanced thermo-oxidative stability of polydicyclopentadiene containing covalently bound nitroxide groups
Article dans une revue avec comité de lecture
The antioxidant 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) group was covalently introduced into polydicyclopentadiene (PDCPD) through ring-opening metathesis polymerization (ROMP) copolymerization of dicyclopentadiene (DCPD) with a TEMPO-derived norbornene comonomer. The thermal oxidation of the resulting thin films was monitored by ThermoGravimetric Analyses (TGA) and Fourier-Transform Infra-Red spectroscopy (FT-IR). This new PDCPD stabilized by immobilization of the TEMPO antioxidant shows a better thermo-oxidative stability at 60 °C under air than an industrial formulation of PDCPD stabilized with 2,6-di‑tert‑butyl‑4-methylphenol (BHT). Impact of thermal oxidation on mechanical behaviour of both formulations have been studied by tensile tests and fracture tests, based on the essential work of fracture (EWF) concept. The TEMPO-functionalized PDCPD offers a promising alternative to BHT-stabilized PDCPD with comparable ductility but slower decay and better cracking resistance, confirming the benefit of the TEMPO antioxidant in PDCPD formulation when chemically bound to the matrix.
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ROMP of novel hindered phenol-functionalized norbornenes and preliminary evaluation as stabilizing agents† Article dans une revue avec comité de lectureNICOLAS, Clémence; HUANG, Jing; RICHAUD, Emmanuel; MINNE, Wendy; DROZDZAK, Renata; RECHER, Gilles; FONTAINE, Laurent; MONTEMBAULT, Véronique (Elsevier, 2021)A series of new norbornene monomers containing sterically hindered phenol groups have been synthesized and polymerized via ring-opening metathesis polymerization (ROMP) using the Grubbs 3rd generation catalyst (G3’). ROMPs ...
Chapitre d'ouvrage scientifiqueHUANG, Jing; RICHAUD, Emmanuel; LE GAC, Pierre-Yves; DAVID, Adelina; DROZDZAK, Renata; GILLES, Recher (Elsevier, 2020)Polydicyclopentadiene (PDCPD) is a thermoset polymer synthetized from Ring Opening Metathesis Polymerization and produced by Reaction Injection Moulding process. Due to its interesting properties, like short processing ...
Article dans une revue avec comité de lectureHUANG, Jing; MINNE, Wendy; DROZDZAK, Renata; RECHER, Gilles; LE GAC, Pierre Yves; RICHAUD, Emmanuel (Elsevier, 2020)Thin unstabilized PDCPD film were thermally oxidized in ovens at several temperatures ranging from 50 °C to 120 °C. Hydroperoxide concentration was monitored by DSC. It was observed that hydroperoxides concentration reaches ...
Article dans une revue avec comité de lectureHUANG, Jing; DAVID, Adelina; LE GAC, Pierre-Yves; LORTHIOIR, Cédric; COELHO, Cristina; RICHAUD, Emmanuel (Elsevier, 2019)This paper reports chemical changes that occur in polydicyclopentadiene during thermal oxidation at several temperatures and oxygen pressures. A particular attention was paid to the double bond consumption since these ...
Article dans une revue avec comité de lectureDEFAUCHY, Virginie; LE GAC, Pierre Yves; GUINAULT, Alain; VERDU, Jacques; RECHER, Gilles; DROZDZAK, Renata; RICHAUD, Emmanuel (Elsevier, 2017)The in situ thermal oxidation of thin unstabilized polydicyclopentadiene was studied by TGA to monitor mass gain, and DSC to characterize hydroperoxides concentration. Results were discussed using kinetic analysis, which ...