FN Archimer Export Format PT J TI Strain-induced crystallization in a carbon-black filled polychloroprene rubber: kinetics and mechanical cycling BT AF Le Gac, Pierre Yves Albouy, Pierre-Antoine Sotta, Paul AS 1:1;2:2;3:3; FF 1:PDG-REM-RDT-LCSM;2:;3:; C1 IFREMER Centre de Bretagne, Marine Structures Laboratory, BP70, 29280, Plouzané, France Laboratoire de Physique des Solides, CNRS, Université Paris-Sud, Université Paris-Saclay, 91405, Orsay, France Laboratoire Polymères et Matériaux Avancés, CNRS/Solvay UMR 5268, 87 avenue des Frères Perret, 69192, Saint-Fons, France C2 IFREMER, FRANCE UNIV PARIS SUD, FRANCE CNRS, FRANCE SI BREST SE PDG-REM-RDT-LCSM IN WOS Ifremer UPR copubli-france copubli-univ-france IF 4.231 TC 10 UR https://archimer.ifremer.fr/doc/00488/60003/63239.pdf LA English DT Article DE ;Polychloroprene;Strain-induced crystallization;X-ray AB It is shown in the present paper how the addition of a moderate amount of carbon black filler to a polychloroprene gum modifies the local strain state and alters the ability of the polymer to strain-crystallize. The study combines mechanical and X-ray diffraction performed during classical mechanical cycling and tensile impact tests. It highlights the fact that the strain modification induced by the filler addition is highly inhomogeneous: the crystallization behavior and the local draw ratio state are affected differently. The partial relaxation of the amorphous fraction by the strain-induced crystallization peviously evidenced in the pure gum is still present and should play a protective role. The effect of temperature on the crystallization correlates with the evolution of stress-strain curves. In particular the role of crystallization in stress-hardening is apparently amplified by the presence of the filler. Preliminary tensile tests reveal a drastic decrease of the induction time necessary for crystallization to develop. This implies a strain amplification effect higher than predicted from mechanical cycling analysis. It is proposed that carbon black particles have no time to relax during the fast stretching period. All these observations point to a synergistic effect between filler addition and strain-induced crystallization. PY 2019 PD MAY SO Polymer SN 0032-3861 PU Elsevier BV VL 173 UT 000468320100016 BP 158 EP 165 DI 10.1016/j.polymer.2019.04.019 ID 60003 ER EF