FN Archimer Export Format
PT J
TI Strain-induced crystallization in an unfilled polychloroprene rubber: Kinetics and mechanical cycling
BT 
AF LE GAC, Pierre-Yves
   ALBOUY, Pierre-Antoine
   PETERMANN, Denis
AS 1:1;2:2;3:2;
FF 1:PDG-REM-RDT-LCSM;2:;3:;
C1 IFREMER Ctr Bretagne, Marine Struct Lab, BP70, F-29280 Plouzane, France.
   Univ Paris Saclay, Univ Paris Sud, CNRS, Lab Phys Solides, F-91405 Orsay, France.
C2 IFREMER, FRANCE
   UNIV PARIS SACLAY, FRANCE
SI BREST
SE PDG-REM-RDT-LCSM
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-univ-france
IF 3.771
TC 29
UR https://archimer.ifremer.fr/doc/00433/54467/55842.pdf
LA English
DT Article
DE ;Polychloroprene;Strain-induced crystallization;X-ray
AB Polychloroprene rubber is often quoted as an example of strain-crystallizing elastomer; however, this fundamental property, known to impart good mechanical properties and fatigue resistance, has received much less attention in this class of compounds than natural rubber. The present paper relates systematic investigations combining mechanical and X-ray diffraction measurements. Crystallization kinetics are first investigated based on tensile impact tests. An approximately logarithmic time-dependence is found for the crystalline content and the time-constants are estimated at various temperatures. The impact of strain-induced crystallization on stress-strain curves under mechanical cycling conditions is further assessed. It is demonstrated that one main effect of strain-induced crystallization is a partial relaxation of the strain experienced by the amorphous fraction, although stress-hardening is simultaneously observed. Based on the stress-optical law, the contribution of the amorphous phase to the stress is shown to level off after crystallization onset, and stress-hardening is attributed to crystallite networking. The crystallite network rapidly disintegrates at the beginning of recovery, and the stress-optical law shows that the amorphous fraction becomes the only contributor to the stress at still non-negligible crystalline contents. 
PY 2018
PD APR
SO Polymer
SN 0032-3861
PU Elsevier Sci Ltd
VL 142
UT 000430358900022
BP 209
EP 217
DI 10.1016/j.polymer.2018.03.034
ID 54467
ER

EF