FN Archimer Export Format
PT J
TI Oxidation of unvulcanized, unstabilized polychloroprene: a kinetic study
BT 
AF LE GAC, Pierre Yves
   ROUX, Gerard
   VERDU, Jacques
   DAVIES, Peter
   FAYOLLE, Bruno
AS 1:1;2:2;3:3;4:1;5:3;
FF 1:PDG-REM-RDT-LCSM;2:;3:;4:PDG-REM-RDT-LCSM;5:;
C1 IFREMER, Ctr Bretagne, Marine Struct Lab, F-29280 Plouzane, France.
   Thales Underwater Syst, F-06903 Sophia Antipolis, France.
   Arts & Metiers ParisTech, PIMM, F-75013 Paris, France.
C2 IFREMER, FRANCE
   THALES, FRANCE
   ARTS & METIERS PARISTECH, FRANCE
SI BREST
SE PDG-REM-RDT-LCSM
IN WOS Ifremer jusqu'en 2018
   copubli-france
IF 3.163
TC 12
UR https://archimer.ifremer.fr/doc/00199/31010/29413.pdf
LA English
DT Article
DE ;Polychloroprene;Oxidation;Radical chain;Kinetics
AB Thermal oxidation in air at atmospheric pressure, in the 80-140°C temperature range and in oxygen at 100°C in the 0.02-3 MPa pressure range, of unvulcanized, unstabilized, unfilled polychloroprene (CR) has been characterized using FTIR and chlorine concentration measurement. The kinetic analysis was focused on double bond consumption. A mechanistic scheme involving unimolecular and bimolecular hydroperoxide decomposition, oxygen addition to alkyl radicals, hydrogen abstraction on allylic methylenes, alkyl and peroxyl additions to double bonds and terminations involving alkyl and peroxy radicals was elaborated. The corresponding rate constants were partly extracted from the literature and partly determined from experimental data using the kinetic model derived from the mechanistic scheme in an inverse approach. Among the specificities of polychloroprene, the following were revealed: The rate of double bond consumption is a hyperbolic function of oxygen pressure that allows a law previously established for the oxidation of saturated substrates to be generalized. CR oxidation is characterized by the absence of an induction period that reveals the instability of hydroperoxides. The kinetic analysis also reveals that peroxyl addition is faster than hydrogen abstraction but slower in CR than in common hydrocarbon polydienes.
PY 2014
PD NOV
SO Polymer Degradation And Stability
SN 0141-3910
PU Elsevier Sci Ltd
VL 109
UT 000345472900023
BP 175
EP 183
DI 10.1016/j.polymdegradstab.2014.06.019
ID 31010
ER

EF