Crystalline structure and morphology of poly(L-lactide) Formed under high-pressure CO2

Hironori Marubayashi, Satoshi Akaishi, Shuichi Akasaka, Shigeo Asai, Masao Sumita

研究成果: Article査読

133 被引用数 (Scopus)

抄録

Crystalline structure and morphology of poly(L-lactide) (PLLA) formed under high-pressure CO2 were studied by comparing the C0 2-treated PLLA and the annealed one in terms of the crystallization behavior, crystalline forms, and crystalline superstructures. The crystallization temperature dependence of the diffraction peak position (2θ-16°) and crystallinity for the C02-treated PLLA indicates that the crystal modification changes continuously from the disorder α (α ) to a forms not through the a one with increasing temperature. By using light scattering technique, we clarified that the morphological transition from spherulites on a micrometer scale to rodlike crystalline superstructures on a nanometer scale occurs around 15 °C under 7-15 MPa CO2 and around 30 °C under 3 MPa CO2. By introducing the parameters Ν and A in the theoretical calculation for Vv light scattering from spherulites, it is indicated that there is a distinct difference in the arrangement of crystalline lamellae within spherulite between the C0 2-treated PLLA and the annealed one.

本文言語English
ページ(範囲)9192-9203
ページ数12
ジャーナルMacromolecules
41
23
DOI
出版ステータスPublished - 2008 12月 9
外部発表はい

ASJC Scopus subject areas

  • 有機化学
  • ポリマーおよびプラスチック
  • 無機化学
  • 材料化学

フィンガープリント

「Crystalline structure and morphology of poly(L-lactide) Formed under high-pressure CO2」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル