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Processing of a Strong Biodegradable Poly[( R )‐3‐hydroxybutyrate] Fiber and a New Fiber Structure Revealed by Micro‐Beam X‐Ray Diffraction with Synchrotron Radiation
Author(s) -
Iwata Tadahisa,
Aoyagi Yoshihiro,
Fujita Masahiro,
Yamane Hideki,
Doi Yoshiharu,
Suzuki Yoshio,
Takeuchi Akihisa,
Uesugi Kentaro
Publication year - 2004
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.200400110
Subject(s) - fiber diffraction , synchrotron radiation , materials science , annealing (glass) , diffraction , ultimate tensile strength , protein filament , polymer , fiber , synchrotron , zigzag , crystallography , composite material , helix (gastropod) , x ray crystallography , optics , chemistry , physics , geometry , mathematics , ecology , snail , biology
Summary: Biodegradable poly[( R )‐3‐hydroxybutyrate] (P(3HB)) fibers with high tensile strength of 1.32 GPa were processed from ultra‐high‐molecular‐weight P(3HB) by a method combining cold‐drawing and two‐step‐drawing procedures at room temperature. The distribution of molecular structures in a mono‐filament was analyzed by micro‐beam X‐ray diffraction with synchrotron radiation. It was revealed that the P(3HB) fiber has a new core‐sheath structure consistent with two types of molecular conformations: a 2 1 helix conformation in the sheath region and a planar zigzag conformation in the core region.P(3HB) fiber processed by cold‐drawing in ice water and two‐step drawing at room temperature, and subsequently annealing at 50 °C.
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