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
✍ Scribed by Tadahisa Iwata; Yoshihiro Aoyagi; Masahiro Fujita; Hideki Yamane; Yoshiharu Doi; Yoshio Suzuki; Akihisa Takeuchi; Kentaro Uesugi
- Publisher
- John Wiley and Sons
- Year
- 2004
- Tongue
- English
- Weight
- 174 KB
- Volume
- 25
- Category
- Article
- ISSN
- 1022-1336
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✦ Synopsis
Abstract
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.
imageP(3HB) fiber processed by cold‐drawing in ice water and two‐step drawing at room temperature, and subsequently annealing at 50 °C.