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Title: Dominating factor of strain-induced crystallization in natural rubber
Authors: Gros, Alice
Tosaka, Masatoshi  kyouindb  KAKEN_id  orcid https://orcid.org/0000-0001-8016-8329 (unconfirmed)
Huneau, Bertrand
Verron, Erwan
Poompradub, Sirilux
Senoo, Kazunobu
Author's alias: 登阪, 雅聡
Keywords: Nucleation
Crystallization rate
Shish-kebab structure
Issue Date: Oct-2015
Publisher: Elsevier Ltd.
Journal title: Polymer
Volume: 76
Start page: 230
End page: 236
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.
Rights: © 2015. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
The full-text file will be made open to the public on 1 October 2017 in accordance with publisher's 'Terms and Conditions for Self-Archiving'.
This is not the published version. Please cite only the published version. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。
URI: http://hdl.handle.net/2433/202579
DOI(Published Version): 10.1016/j.polymer.2015.08.058
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