FN Archimer Export Format
PT J
TI Relationship between network structure and ultimate properties in polyurethane during a chain scission process
BT 
AF Taourit, Sabrina
   Le Gac, Pierre Yves
   Fayolle, Bruno
AS 1:1,2,3;2:1;3:3;
FF 1:PDG-REM-RDT-LCSM;2:PDG-REM-RDT-LCSM;3:;
C1 Ifremer, Marine Structures Laboratory, Centre de Brest, BP 70, 29280 Plouzané, France
   Dutch Polymer Institute (DPI), P.O. Box 902, 5600 AX Eindhoven, the Netherlands
   PIMM, Arts et Metiers Institute of Technology, CNRS, Cnam, HESAM University, 151 Boulevard de l'Hopital 75013 Paris, France
C2 IFREMER, FRANCE
   DUTCH POLYMER INSTITUTE (DPI), NETHERLANDS
   CNAM, FRANCE
SI BREST
SE PDG-REM-RDT-LCSM
IN WOS Ifremer UPR
   copubli-france
   copubli-europe
IF 5.9
TC 10
UR https://archimer.ifremer.fr/doc/00772/88371/96023.pdf
LA English
DT Article
DE ;Polyurethane;Hydrolysis;Structure/properties relationships;Tensile behaviour
AB To investigate the impact of chain scission on the tensile properties of elastomers, a polyester-based polyurethane was aged in seawater at several temperatures ranging from 40 °C to 90 °C. Before the hydrolysis process, water diffusion was first characterized and described by Fickian behaviour. In terms of temperature dependence, both mass at saturation and water diffusivity followed Arrhenius behaviour. For ageing durations that exceed saturation time, ester bond hydrolysis occurs and leads to chain scission within the polymer network. This chain scission rate could be described using a first-order reaction and followed Arrhenius behaviour with an activation energy of 71 kJ/mol. From a mechanical point of view, hydrolysis leads to large changes in both stress and strain at break. A gradual decrease in stress at break was observed for all ageing temperatures. Nevertheless, strain at break first increases during ageing and then drops off when the crosslink density is below a critical value of 1.25 kg/mol. After considering more than 30 ageing conditions, relationships between the average crosslink density and these ultimate properties were proposed and discussed here. 
PY 2022
PD JUN
SO Polymer Degradation And Stability
SN 0141-3910
PU Elsevier BV
VL 201
UT 000808400500012
DI 10.1016/j.polymdegradstab.2022.109971
ID 88371
ER

EF