FN Archimer Export Format
PT J
TI Predictive ageing of elastomers: Oxidation driven modulus changes for polychloroprene
BT 
AF LE GAC, Pierre-Yves
   CELINA, Mathew
   ROUX, Gerard
   VERDU, Jacques
   DAVIES, Peter
   FAYOLLE, Bruno
AS 1:1;2:2;3:3;4:4;5:1;6:;
FF 1:PDG-REM-RDT-LCSM;2:;3:;4:;5:PDG-REM-RDT-LCSM;6:;
C1 IFREMER Ctr Bretagne, Marine Struct Lab, CS 10070, F-29280 Plouzane, France.
   Sandia Natl Labs, Organ Mat Sci Dept 1853, POB 5800, Albuquerque, NM 87185 USA.
   TUS, Route Dolines,BP 157, F-06903 Sophia Antipolis, France.
   PIMM, Arts & Metiers ParisTech, CNRS, CNAM, 151 Bd Hop, F-75013 Paris, France.
C2 IFREMER, FRANCE
   SANDIA NATL LABS, USA
   THALES, FRANCE
   ARTS & METIERS PARISTECH, FRANCE
SI BREST
SE PDG-REM-RDT-LCSM
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-int-hors-europe
IF 3.386
TC 24
UR https://archimer.ifremer.fr/doc/00342/45323/44784.pdf
LA English
DT Article
DE ;Polychloroprene;Ageing;Sulfur vulcanization;Oxidation;Kinetic modeling;Modulus changes
AB The oxidative ageing in the range of 60 °C–140 °C of sulfur vulcanized polychloroprene has been studied by FTIR spectroscopy (double bond consumption), modulus changes and oxygen absorption measurements. Experiments were carried out on thin films and thick samples to investigate both homogeneous and inhomogeneous (diffusion controlled) oxidation with the goal of establishing the underlying correlation between oxidative degradation chemistry and mechanical property changes. A correlation between oxidatively driven degradation chemistry and modulus is possible using the established approaches of rubber elasticity where an effective crosslinking yield due to double bond reactions is of the order of 30% for this material (i.e. the loss of 3 double bonds results in one effective crosslink associated with material hardening). It is then possible to predict modulus changes induced by oxidation for vulcanized and unstabilized polychloroprene rubber. A kinetic model is introduced with two propagation reactions (hydrogen abstraction and radical addition to double bonds) and two stabilization processes involving sulfur containing moieties from the vulcanization process. The kinetic scheme was solved and the relevant rate constants determined. This model can adequately predict modulus changes in films and thick samples as a function of time and spatially resolved.
PY 2016
PD AUG
SO Polymer Degradation And Stability
SN 0141-3910
PU Elsevier Sci Ltd
VL 130
UT 000380972400035
BP 348
EP 355
DI 10.1016/j.polymdegradstab.2016.06.014
ID 45323
ER

EF