Cho, Kie Yong Hwang, Seung Sang Yoon, Ho Gyu Baek, Kyung-Youl 2024-01-20T12:31:01Z 2024-01-20T12:31:01Z 2021-09-05 2013-05-01 0887-624X https://pubs.kist.re.kr/handle/201004/128077 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 English WILEY RADICAL POLYMERIZATION DIELECTRIC ELASTOMERS BLOCK ELECTROSTRICTION PERFORMANCE MORPHOLOGY STRAIN GELS Electroactive methacrylate-based triblock copolymer elastomer for actuator application Article 10.1002/pola.26563 1 JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, v.51, no.9, pp.1924 - 1932 JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY 51 9 1924 1932 scie scopus 000316812800004 2-s2.0-84875458661 Polymer Science Polymer Science Article RADICAL POLYMERIZATION DIELECTRIC ELASTOMERS BLOCK ELECTROSTRICTION PERFORMANCE MORPHOLOGY STRAIN GELS atom transfer radical polymerization block copolymers elastomers microstructure stimuli-sensitive polymers