NDLI: Dominating factor of strain-induced crystallization in natural rubber

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Dominating factor of strain-induced crystallization in natural rubber

Content Provider	Hyper Articles en Ligne (HAL)
Author	Gros, Alice Tosaka, Masatoshi Huneau, Bertrand Verron, Erwan Poompradub, Sirilux Senoo, Kazunobu
Copyright Year	2015
Abstract	The contribution of entropy change due to stretching of polymer chains in promoting crystal nucleation is theoretically derived for strain-induced crystallization of natural rubber. The results of theoretical calculation are compared with experimental results obtained by fast time-resolved wide-angle X-ray diffraction. Usual values of surface free energies corresponding to chain-folded nuclei lead to theoretical results far from experimental measurements. Because the discrepancy comes from the large activation energy of nucleation even after the stretching of polymer chains, additional contribution of reduced surface free energies due to the formation of bundle-like nuclei was taken into account. This treatment allows to faithfully reproduce experimental results and then to conclude that nuclei formed in natural rubber during stretching are of bundle-like type. Moreover, it reveals that surface energies have a greater effect on the decrease of critical free energy than the change in entropy due to deformation.
Related Links	https://hal.science/hal-01276181/file/GTHVPS.pdf
ISSN	00323861
DOI	10.1016/j.polymer.2015.08.058
Journal	Polymer
Volume Number	76
Language	English
Publisher	HAL CCSD Elsevier
Publisher Date	2015-01-01
Access Restriction	Open
Subject Keyword	Shish-kebab structure Nucleation Crystallization rate
Content Type	Text
Resource Type	Article
Subject	Organic Chemistry Physics and Astronomy Materials Chemistry Polymers and Plastics

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