Side-chain fluorination effects on morphological behavior of ps-b-ptbma: Disorder to order structures

Seongjun Jo, Seongjin Park, Taesuk Jun, Yeongsik Kim, Du Yeol Ryu

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Side-chain fluorination effects on morphological behavior of symmetric polystyrene-b-poly(tert-butyl methacrylate) (PS-b-PtBMA) was investigated using small angle X-ray scattering, where the tBMA units were partially modified into 2,2,2-trifluoroethyl methacrylate (TFEMA) and methacrylic anhydride (MAA) units to form PS-b-P(tBMA-r-TFEMA-r-MAA)s. Above 50% fluorination from 7.8 kg/mol PS-b-PtBMA, a lamellar structure was identified over the entire temperature range up to 240oC. However, a 36% fluorination product exhibited the morphological transition from cylindrical to gyroid structures further to disordered state with increasing temperature. This abnormal phase stability was attributed presumably to a transient increase in conformational asymmetry that creates spontaneous interfacial curvatures between the two blocks.

Original languageEnglish
Pages (from-to)401-406
Number of pages6
JournalJournal of Photopolymer Science and Technology
Volume32
Issue number3
DOIs
Publication statusPublished - 2019 Jan 1

All Science Journal Classification (ASJC) codes

  • Polymers and Plastics
  • Organic Chemistry
  • Materials Chemistry

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