FN Archimer Export Format
PT J
TI Relationships between molar mass and fracture properties of segmented urethane and amide copolymers modified by chemical degradation
BT 
AF Bardin, Antoine
   Le Gac, Pierre Yves
   Bindi, Hervé
   Fayolle, Bruno
AS 1:1,2,3;2:1;3:2;4:3;
FF 1:;2:PDG-REM-RDT-LCSM;3:;4:;
C1 Marine Structure Laboratory IFREMER, Centre de Bretagne Plouzané ,France
   Thales DMS France Valbonne, France
   PIMM laboratory, Arts et Metiers Institute of Technology CNRS, Cnam, HESAM Université Paris ,France
C2 IFREMER, FRANCE
   THALES, FRANCE
   ENSAM, FRANCE
SI BREST
SE PDG-REM-RDT-LCSM
IN WOS Ifremer UPR
   copubli-france
IF 3.046
TC 5
UR https://archimer.ifremer.fr/doc/00653/76546/77850.pdf
LA English
DT Article
DE ;essential work of fracture;poly(ether-block-amide);structure-property relationship;thermoplastic elastomer;thermoplastic polyurethane elastomer
AB This publication highlights the structure–property relationships in several thermoplastic elastomers (TPEs): one poly(ether‐block‐amide) and two thermoplastic polyurethane elastomers with ester and ether soft blocks. Structural changes are induced by chemical degradation from virgin samples through hydrolysis and oxidation. Molar mass measurements show an exclusive chain scission mechanism for all TPEs, regardless of the chemical modification condition. Mechanical behavior was nevertheless obtained from uniaxial tensile testing and fracture testing while considering the essential work of fracture (EWF) concept. During the macromolecular scission process, elongation at break shows a plateau followed by a drop, while stress at break decreases steadily. Once again, the trend is identical for all TPEs in all conditions considered. The βwp parameter determined using the EWF concept exhibits an interesting sensitivity to scissions (i.e., molar mas decrease). Plotting elongation at break as a function of molar mass reveals a strong correlation between these two parameters. This master curve is particularly remarkable considering the range of TPEs and chemical breakdown pathways considered (hydrolysis and oxidation at several temperatures). Relevant structure–property relationships are proposed, highlighting that molar mass is a predominant parameter for determining the mechanical properties of thermoplastic elastomers. 
PY 2020
PD NOV
SO Journal Of Polymer Science
SN 2642-4150
PU Wiley
VL 58
IS 22
UT 000574621300001
BP 3170
EP 3182
DI 10.1002/pol.20200460
ID 76546
ER

EF