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Please use this identifier to cite or link to this item: http://hdl.handle.net/10119/10729

Title: Anomalous mechanical anisotropy of β form polypropylene sheet with N,N′-dicyclohexyl-2,6-naphthalenedicarboxamide
Authors: Phulkerd, Panitha
Nobukawa, Shogo
Uchiyama, Yohei
Yamaguchi, Masayuki
Keywords: polypropylene
molecular orientation
T-die extrusion
mechanical anisotropy
Issue Date: 2011-08-25
Publisher: Elsevier
Magazine name: Polymer
Volume: 52
Number: 21
Start page: 4867
End page: 4872
DOI: 10.1016/j.polymer.2011.08.014
Abstract: An extruded polypropylene (PP) sheet in which both the chain-axes of the PP molecules and the crystalline lamellae are oriented perpendicular to the flow direction is obtained via row-nucleation on a specific needle-shaped nucleating agent, N,N’-dicyclohexyl-2,6-naphthalenedicarboxamide. The sheet shows anomalous anisotropy in dynamic tensile modulus, in which, at lower temperatures, the storage modulus in the machine direction (MD) is lower than that in the transverse direction (TD), and this behavior reverses at high temperature. Tensile tests reveal that the Young’s modulus and yield stress in the MD are higher than those in the TD. At high strain rate, the strain at break in the TD is, in contrast, markedly larger than that in the MD.
Rights: NOTICE: This is the author's version of a work accepted for publication by Elsevier. Panitha Phulkerd, Shogo Nobukawa, Yohei Uchiyama, Masayuki Yamaguchi, Polymer, 52(21), 2011, 4867-4872, http://dx.doi.org/10.1016/j.polymer.2011.08.014
URI: http://hdl.handle.net/10119/10729
Material Type: author
Appears in Collections:c10-1. 雑誌掲載論文 (Journal Articles)

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