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Synthesis and orientation study of a magnetically aligned liquid‐crystalline chitin/poly(acrylic acid) composite
Authors:Thi Thi Nge  Naruhito Hori  Akio Takemura  Hirokuni Ono  Tsunehisa Kimura
Abstract:
A high magnetic field of 5 T was used to fabricate a magnetically aligned, optically anisotropic, liquid‐crystalline chitin/poly(acrylic acid) composite. The aligned mesophase was fixed by photoinitiated free‐radical polymerization. From an examination of polarized optical micrographs and an X‐ray diffraction study, a high degree of orientation of 0.70 was observed for the composite with a higher liquid‐crystalline chitin concentration (10.70 wt %); the orientation was reduced with a decreased chitin concentration at a given acrylic acid concentration. The X‐ray data for the developed composite showed a uniplanar orientation for the chitin crystallites, with its molecular long axes perpendicular to the direction of the magnetic field. © 2003 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 41: 711–714, 2003
Keywords:liquid‐crystalline chitin  magnetic alignment  composites  orientation  X‐ray
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