Loop and Bridge Conformations of ABA Triblock Comb Copolymers: A Conformational Assessment for Molecular Composites

Jihoon Park, Je Yeon Jung, Hyun Woo Shin, Jong Wan Park, Joona Bang, June Huh

Research output: Contribution to journalArticlepeer-review

Abstract

We computationally investigate the conformational behavior, “bridging” chain, between different the phase-separated domains vs “looping” chain on the same domain, for two chain architectures of ABA triblock copolymers, one with a linear architecture (L-TBC) and the other with comb architecture (C-TBC) at various segregation regimes using dissipative particle dynamics (DPD) simulations. The power-law relation between the bridge fraction (Φ) and the interaction parameter (χ) for C-TBC is found to be Φ ∼ χ−1.6 in the vicinity of the order-disorder transition (χODT), indicating a drastic conversion from the bridge to the loop conformation. When χ further increases, the bridge-loop conversions slow down to have the power law, Φ ∼ χ−0.18, approaching the theoretical power law Φ ∼ χ−1/9 predicted in the strong segregation limit. The conformational assessment conducted in the present study can provide a strategy of designing optimal material and processing conditions for triblock copolymer either with linear or comb architecture to be used for thermoplastic elastomer or molecular nanocomposites.

Original languageEnglish
Article number2301
JournalPolymers
Volume14
Issue number11
DOIs
Publication statusPublished - 2022 Jun 1

Keywords

  • bridge conformation
  • comb polymer
  • loop conformation
  • triblock copolymer

ASJC Scopus subject areas

  • Chemistry(all)
  • Polymers and Plastics

Fingerprint

Dive into the research topics of 'Loop and Bridge Conformations of ABA Triblock Comb Copolymers: A Conformational Assessment for Molecular Composites'. Together they form a unique fingerprint.

Cite this