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Electroactive methacrylate-based triblock copolymer elastomer for actuator application

Authors
Cho, Kie YongHwang, Seung SangYoon, Ho GyuBaek, Kyung-Youl
Issue Date
1-5월-2013
Publisher
WILEY
Keywords
atom transfer radical polymerization; block copolymers; elastomers; microstructure; stimuli-sensitive polymers
Citation
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, v.51, no.9, pp.1924 - 1932
Indexed
SCIE
SCOPUS
Journal Title
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
Volume
51
Number
9
Start Page
1924
End Page
1932
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/103255
DOI
10.1002/pola.26563
ISSN
0887-624X
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 degrees 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 (Mw/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 2040 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. (c) 2013 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2013, 51, 1924-1932
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