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Molecular Basis of the Shish-Kebab Morphology in Polymer Crystallization

Kimata, Shuichi and Sakurai, Takashi and Nozue, Yoshinobu and Kasahara, Tatsuya and Yamaguchi, Noboru and Karino, Takeshi and Shibayama, Mitsuhiro and Kornfield, Julia A. (2007) Molecular Basis of the Shish-Kebab Morphology in Polymer Crystallization. Science, 316 (5827). pp. 1014-1017. ISSN 0036-8075.

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In the rich and long-standing literature on the flow-induced formation of oriented precursors to polymer crystallization, it is often asserted that the longest, most extended chains are the dominant molecular species in the “shish” of the “shish-kebab” formation. We performed a critical examination of this widely held view, using deuterium labeling to distinguish different chain lengths within an overall distribution. Small-angle neutron-scattering patterns of the differently labeled materials showed that long chains are not overrepresented in the shish relative to their concentration in the material as a whole. We observed that the longest chains play a catalytic role, recruiting other chains adjacent to them into formation of the shish.

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Kornfield, Julia A.0000-0001-6746-8634
Additional Information:© 2007 American Association for the Advancement of Science. Received 19 January 2007; accepted 23 March 2007. This work was performed using SANS-U of the Institute for Solid State Physics, the University of Tokyo (no. 05.5542). Supported by the NSF Division of Materials Research (DMR-0505393 and Materials Research Science and Engineering Center DMR-0080065).
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Issue or Number:5827
Record Number:CaltechAUTHORS:20141119-095352598
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:51949
Deposited By: Tony Diaz
Deposited On:19 Nov 2014 23:34
Last Modified:03 Oct 2019 07:37

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