Effect of molecular mobility of pre-ordered phase on crystallization in microphase-separated lamellar morphology of strongly segregated crystalline-crystalline diblock copolymers

Shiki Nojima, Yuji Higaki, Katsuhiro Kaetsu, Ryohei Ishige, Noboru Ohta, Hiroyasu Masunaga, Tomoyasu Hirai, Ken Kojio, Atsushi Takahara

研究成果: ジャーナルへの寄稿記事

1 引用 (Scopus)

抄録

The effect of molecular mobility of a pre-crystallized phase on the isothermal crystallization in the microphase-separated lamellar morphology of a strongly segregated crystalline-crystalline block copolymer, poly(ethylene glycol)-block-poly(perfluorooctylethyl acrylate) (PEG-b-PFA-C8), was investigated. The diblock copolymer produced a microphase-separated lamellar morphology in the melt state, and the precedent crystallization of PFA-C8 blocks provided the lamellar confinement field. The counter PEG block crystallized within the lamellar confinement field. The molecular mobility of the pre-crystallized PFA-C8 phase was modulated by the thermal history. The structural evolution was monitored by a complementary combination of in situ time-resolved simultaneous small-angle X-ray scattering/wide-angle X-ray diffraction measurements and thermal analyses. The degree of crystallinity and the melting temperature of the PEG crystals were associated with the molecular mobility of the pre-crystallized PFA-C8 phase. The highly packed PFA-C8 phase (higher-ordered phase) constrained the PEG crystallization, whereas the loosely packed PFA-C8 phase (lower-ordered phase) caused a weak restriction in the PEG crystallization to give relatively ordered PEG crystals. Subsequent crystallization in a confinement field of crystalline-crystalline block copolymers was controlled by adjusting the molecular mobility of the pre-crystallized phase.

元の言語英語
ページ(範囲)403-411
ページ数9
ジャーナルpolymer
116
DOI
出版物ステータス出版済み - 5 5 2017

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Crystallization
Polyethylene glycols
Block copolymers
Crystalline materials
Crystals
X ray scattering
Melting point
X ray diffraction

All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics

これを引用

Effect of molecular mobility of pre-ordered phase on crystallization in microphase-separated lamellar morphology of strongly segregated crystalline-crystalline diblock copolymers. / Nojima, Shiki; Higaki, Yuji; Kaetsu, Katsuhiro; Ishige, Ryohei; Ohta, Noboru; Masunaga, Hiroyasu; Hirai, Tomoyasu; Kojio, Ken; Takahara, Atsushi.

:: polymer, 巻 116, 05.05.2017, p. 403-411.

研究成果: ジャーナルへの寄稿記事

Nojima, Shiki ; Higaki, Yuji ; Kaetsu, Katsuhiro ; Ishige, Ryohei ; Ohta, Noboru ; Masunaga, Hiroyasu ; Hirai, Tomoyasu ; Kojio, Ken ; Takahara, Atsushi. / Effect of molecular mobility of pre-ordered phase on crystallization in microphase-separated lamellar morphology of strongly segregated crystalline-crystalline diblock copolymers. :: polymer. 2017 ; 巻 116. pp. 403-411.
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abstract = "The effect of molecular mobility of a pre-crystallized phase on the isothermal crystallization in the microphase-separated lamellar morphology of a strongly segregated crystalline-crystalline block copolymer, poly(ethylene glycol)-block-poly(perfluorooctylethyl acrylate) (PEG-b-PFA-C8), was investigated. The diblock copolymer produced a microphase-separated lamellar morphology in the melt state, and the precedent crystallization of PFA-C8 blocks provided the lamellar confinement field. The counter PEG block crystallized within the lamellar confinement field. The molecular mobility of the pre-crystallized PFA-C8 phase was modulated by the thermal history. The structural evolution was monitored by a complementary combination of in situ time-resolved simultaneous small-angle X-ray scattering/wide-angle X-ray diffraction measurements and thermal analyses. The degree of crystallinity and the melting temperature of the PEG crystals were associated with the molecular mobility of the pre-crystallized PFA-C8 phase. The highly packed PFA-C8 phase (higher-ordered phase) constrained the PEG crystallization, whereas the loosely packed PFA-C8 phase (lower-ordered phase) caused a weak restriction in the PEG crystallization to give relatively ordered PEG crystals. Subsequent crystallization in a confinement field of crystalline-crystalline block copolymers was controlled by adjusting the molecular mobility of the pre-crystallized phase.",
author = "Shiki Nojima and Yuji Higaki and Katsuhiro Kaetsu and Ryohei Ishige and Noboru Ohta and Hiroyasu Masunaga and Tomoyasu Hirai and Ken Kojio and Atsushi Takahara",
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AU - Nojima, Shiki

AU - Higaki, Yuji

AU - Kaetsu, Katsuhiro

AU - Ishige, Ryohei

AU - Ohta, Noboru

AU - Masunaga, Hiroyasu

AU - Hirai, Tomoyasu

AU - Kojio, Ken

AU - Takahara, Atsushi

PY - 2017/5/5

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N2 - The effect of molecular mobility of a pre-crystallized phase on the isothermal crystallization in the microphase-separated lamellar morphology of a strongly segregated crystalline-crystalline block copolymer, poly(ethylene glycol)-block-poly(perfluorooctylethyl acrylate) (PEG-b-PFA-C8), was investigated. The diblock copolymer produced a microphase-separated lamellar morphology in the melt state, and the precedent crystallization of PFA-C8 blocks provided the lamellar confinement field. The counter PEG block crystallized within the lamellar confinement field. The molecular mobility of the pre-crystallized PFA-C8 phase was modulated by the thermal history. The structural evolution was monitored by a complementary combination of in situ time-resolved simultaneous small-angle X-ray scattering/wide-angle X-ray diffraction measurements and thermal analyses. The degree of crystallinity and the melting temperature of the PEG crystals were associated with the molecular mobility of the pre-crystallized PFA-C8 phase. The highly packed PFA-C8 phase (higher-ordered phase) constrained the PEG crystallization, whereas the loosely packed PFA-C8 phase (lower-ordered phase) caused a weak restriction in the PEG crystallization to give relatively ordered PEG crystals. Subsequent crystallization in a confinement field of crystalline-crystalline block copolymers was controlled by adjusting the molecular mobility of the pre-crystallized phase.

AB - The effect of molecular mobility of a pre-crystallized phase on the isothermal crystallization in the microphase-separated lamellar morphology of a strongly segregated crystalline-crystalline block copolymer, poly(ethylene glycol)-block-poly(perfluorooctylethyl acrylate) (PEG-b-PFA-C8), was investigated. The diblock copolymer produced a microphase-separated lamellar morphology in the melt state, and the precedent crystallization of PFA-C8 blocks provided the lamellar confinement field. The counter PEG block crystallized within the lamellar confinement field. The molecular mobility of the pre-crystallized PFA-C8 phase was modulated by the thermal history. The structural evolution was monitored by a complementary combination of in situ time-resolved simultaneous small-angle X-ray scattering/wide-angle X-ray diffraction measurements and thermal analyses. The degree of crystallinity and the melting temperature of the PEG crystals were associated with the molecular mobility of the pre-crystallized PFA-C8 phase. The highly packed PFA-C8 phase (higher-ordered phase) constrained the PEG crystallization, whereas the loosely packed PFA-C8 phase (lower-ordered phase) caused a weak restriction in the PEG crystallization to give relatively ordered PEG crystals. Subsequent crystallization in a confinement field of crystalline-crystalline block copolymers was controlled by adjusting the molecular mobility of the pre-crystallized phase.

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