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

Autor:	Akihisa Takeuchi, Yoshiharu Doi, Yoshio Suzuki, Tadahisa Iwata, Hideki Yamane, Yoshihiro Aoyagi, Kentaro Uesugi, Masahiro Fujita
Rok vydání:	2004
Předmět:	Diffraction Materials science Polymers and Plastics Annealing (metallurgy) Organic Chemistry X-ray Synchrotron radiation Crystallography Synthetic fiber Zigzag X-ray crystallography Ultimate tensile strength Materials Chemistry Composite material
Zdroj:	Macromolecular Rapid Communications. 25:1100-1104
ISSN:	1521-3927 1022-1336
DOI:	10.1002/marc.200400110
Popis:	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.
Databáze:	OpenAIRE
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