Supramolecular morphology of two-step melt-spun poly(dioxanone) fibers |
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| Authors: | Yutaka Kawahara Atsushi Nakayama Masatoshi Shioya Masaki Tsuji Hideki Yamane Tadahisa Iwata |
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| Affiliation: | (1) Department of Biological & Chemical Engineering, Gunma University, 1-5-1, Tenjin-cho, Kiryu, Gunma 376-8515, Japan;(2) Department of Organic and Polymeric Materials, Tokyo Institute of Technology, Tokyo 152-8552, Japan;(3) Institute for Chemical Research, Kyoto University, Kyoto-fu, Uji 611-0011, Japan;(4) Department of Bio-based Materials Science, Kyoto Institute of Technology, Matsugasaki, Kyoto 606-8585, Japan;(5) Department of Biomaterial Sciences, The University of Tokyo, 1-1-1, Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan |
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| Abstract: | Structure of poly(dioxanone) (PPDX) fibers produced through a two-step melt-spinning process with an additional short-period
annealing above the melting temperature of PPDX was investigated and the effect of annealing on the degradation behavior was
discussed. The morphological study carried out by etching the fibers using a phosphate or permanganate solution suggested
that the fibers take a skin–core structure, and both the skin layer and the core region consist of a bundle of microfibrils.
The micro-beam X-ray diffraction analysis revealed that the short-period annealing in the production process only slightly
promotes the crystallization in the skin layer but contributes to increasing the packing of amorphous chains near the skin,
which seems to be the controlling factor of the hydrolytic degradation behavior of the fibers. |
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