Thermooxidative Ageing Of Polydicyclopentadiene In Glassy State

Type Article
Date 2014-04
Language English
Author(s) Richaud Emmanuel1, Le Gac Pierre-YvesORCID2, Verdu Jacques1
Affiliation(s) 1 : Arts & Metiers ParisTech, CNRS, PIMM UMR 8006, F-75013 Paris, France.
2 : IFREMER Ctr Bretagne, Marine Struct Lab, F-29280 Plouzane, France.
Source Polymer Degradation And Stability (0141-3910) (Elsevier Sci Ltd), 2014-04 , Vol. 102 , P. 95-104
DOI 10.1016/j.polymdegradstab.2014.01.036
WOS© Times Cited 20
Keyword(s) Polydicyclopentadiene, Thermal oxidation, Kinetics, Molecular mobility
Abstract Thermal ageing of thin films of unstabilized polydicyclopentadiene (pDCPD) at several temperatures ranging from 120 to 30°C was investigated by means of carbonyl build up by FTIR with ammonia derivatization, double bond titration, mass uptake measurement, hydroperoxides titration by iodometry and DSC coupled with sulfur dioxide treatment. In the temperature range under investigation, pDCPD is in glassy state and it oxidizes faster than common polymers oxidized at rubbery state (e.g. polydienic elastomers). Using the kinetic analysis, these results were ascribed to increased initiation rate due to catalyst residues, some possible intramolecular processes favoring propagation, or a very low termination rate of oxidation radical chains because of the control of termination reactions by macroradical diffusion.
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