Electroactive methacrylate-based triblock copolymer elastomer for actuator application

Kie Yong Cho, Seung Sang Hwang, Ho Gyu Yoon, Kyung Youl Baek

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

A series of ABA triblock copolymers of methyl methacrylate (MMA) and dodecyl methacrylate (DMA) [poly(MMA-b-DMA-b-MMA)] (PMDM) were synthesized by Ru-based sequential living radical polymerization. For this, DMA was first polymerized from a difunctional initiator, ethane-1,2-diyl bis(2-chloro-2- phenylacetate) with combination of RuCl2(PPh3)3 catalyst and nBu3N additive in toluene at 80 °C. As the conversion of DMA reached over about 90%, MMA was directly added into the reaction solution to give PMDM with controlled molecular weight (M w/Mn ≤ 1.2). These triblock copolymers showed well-organized morphologies such as body centered cubic, hexagonal cylinder, and lamella structures both in bulk and in thin film by self-assembly phenomenon with different poly(methyl methacrylate) (PMMA) weight fractions. Obtained PMDMs with 20-40 wt % of the PMMA segments showed excellent electroactive actuation behaviors at relatively low voltages, which was much superior compared to conventional styrene-ethylene-butylene-styrene triblock copolymer systems due to its higher polarity derived from the methacrylate backbone and lower modulus. © 2013 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2013 A series of well-defined MMA-DMA-MMA triblock copolymers with different molecular weights and compositions were synthesized by in situ sequential block copolymerization of DMA followed by MMA from a difunctional initiator through Ru-based living radical polymerization. Obtained triblock copolymers showed periodically well-organized morphologies both in bulk and in film states, giving excellent actuation performances at relatively lower electric fields due to their polar methacrylate groups (k), lower modulus, and microstructures.

Original languageEnglish
Pages (from-to)1924-1932
Number of pages9
JournalJournal of Polymer Science, Part A: Polymer Chemistry
Volume51
Issue number9
DOIs
Publication statusPublished - 2013 May 1

Keywords

  • atom transfer radical polymerization
  • block copolymers
  • elastomers
  • microstructure
  • stimuli-sensitive polymers

ASJC Scopus subject areas

  • Polymers and Plastics
  • Organic Chemistry
  • Materials Chemistry

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