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| Le Gac, Pierre-yves; Albouy, Pierre-antoine; Petermann, Denis. |
| 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... |
| Tipo: Text |
Palavras-chave: Polychloroprene; Strain-induced crystallization; X-ray. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00433/54467/55842.pdf |
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| Le Gac, Pierre Yves; Albouy, Pierre-antoine; Sotta, Paul. |
| 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... |
| Tipo: Text |
Palavras-chave: Polychloroprene; Strain-induced crystallization; X-ray. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00488/60003/63239.pdf |
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