Crystallization-induced structure fluctuation of crystallized microdomain structure composed of strongly segregated crystalline-crystalline diblock copolymers

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

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Crystallization-induced structure fluctuations in the layer thickness direction and disordering of pre-crystallized structure in crystallized microdomain structure that consist of a strongly segregated crystalline-crystalline diblock copolymer, poly(ethylene glycol)-block-poly(perfluorooctyl ethyl acrylate) (PEG-b-PFA-C8), were investigated. The structure formation process during isothermal crystallization was monitored by in-situ time-resolved simultaneous SAXS/WAXD measurements and thermal analysis. At early stage of isothermal crystallization, three dimensional growth of the PEG lamellar crystals within lamellar microphase-separated morphology induced the volume shrinkage of PEG phase, resulting in the reduction of PEG layer thickness, increase of PFA-C8 layer thickness and disordering of pre-crystallized PFA-C8 crystals. At late stage of isothermal crystallization, one dimensional growth, thickening of PEG lamellar crystals induced the increase of PEG layer thickness and reduction of PFA-C8 layer thickness. The structure fluctuation in the crystallized microdomain structure depends on the crystal growth dimension.

Original languageEnglish
Pages (from-to)256-265
Number of pages10
Journalpolymer
Volume102
DOIs
Publication statusPublished - Oct 12 2016

All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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