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Biaxial Orientation in Triple Centrifuged Natural Rubber
Author(s) -
Alam Mohammad Mahay,
Asano Tsutomu
Publication year - 2006
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200651003
Subject(s) - natural rubber , materials science , crystallization , elongation , diffraction , composite material , morphology (biology) , orientation (vector space) , crystallography , strain (injury) , ultimate tensile strength , optics , chemical engineering , chemistry , geometry , medicine , physics , genetics , mathematics , biology , engineering
Abstract Natural rubber (NR) latex was purified through triple centrifugation process and film samples were prepared. The strain‐induced crystallization was studied during the uniaxial elongation of the NR samples at room temperature. Crystalline orientation was detected by wide angle x‐ray diffraction (WAXD) measuring the intensity of 200 and 120 reflections. The WAXD patterns were compared with the aspect ratio (width/length) of the original NR films. The results indicate that the induced crystals have a biaxial orientation (BO), where the c‐axis is parallel to the draw direction and the a‐axis is parallel to the film surface. Using the WAXD through patterns, we distinguish the highly oriented BO region in the samples. In order to analyze the structure and properties of the NR, the effect of BO is an essential factor.