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タイトル: | Crystal Orientation of Poly(l-Lactic Acid) Induced by Magnetic Alignment of a Nucleating Agent |
著者: | Kusumi, Ryosuke Teranishi, Sachi Kimura, Fumiko Wada, Masahisa https://orcid.org/0000-0002-3508-3307 (unconfirmed) Kimura, Tsunehisa Horikawa, Yoshiki Kawai, Takahiko |
著者名の別形: | 久住, 亮介 木村, 史子 |
キーワード: | poly(l-lactic acid) nucleating agent magnetic orientation epitaxial growth |
発行日: | Jun-2018 |
出版者: | MDPI AG |
誌名: | Polymers |
巻: | 10 |
号: | 6 |
論文番号: | 653 |
抄録: | The orientation of poly(l-lactic acid) (PLLA) crystals was controlled through crystal growth from a magnetically oriented nucleating agent, phenylphosphonic acid zinc (PPAZn). The one-dimensional magnetically oriented microcrystal array of PPAZn microcrystals revealed the relationship between the magnetization and crystallographic axes in the PPAZn crystal. The PPAZn microcrystals were homogeneously dispersed in PLLA via melt mixing, which decreased the molecular weight of the PLLA component due to degradation. The PPAZn microcrystals in the molten PLLA were uniaxially aligned under an 8-T static or rotating magnetic field. The wide-angle X-ray diffraction and small-angle X-ray scattering patterns of the PPAZn/PLLA composite films crystallized under each magnetic field showed that the PLLA lamellae grew from the surface of the PPAZn microcrystals, which were uniaxially oriented along the easy- or hard-magnetization axis, with the c-axis of PLLA parallel to the bc-plane of PPAZn. It was also suggested that the greater nucleating effect of PPAZn on PLLA was derived not from geometrical matching, but from factors such as favorable interactions and/or the plate-like shape of the microcrystal. |
著作権等: | © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
URI: | http://hdl.handle.net/2433/232991 |
DOI(出版社版): | 10.3390/polym10060653 |
PubMed ID: | 30966687 |
出現コレクション: | 学術雑誌掲載論文等 |
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