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학술지 Dielectric Elastomers UV-Cured from Poly(dimethylsiloxane) Solution in Vinyl Acetate
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저자
박승구, 최미정, 김동욱, 박봉제, 신은진, 박선택, 윤성률
발행일
202011
출처
Polymers, v.12 no.11, pp.1-8
ISSN
2073-4360
출판사
MDPI
DOI
https://dx.doi.org/10.3390/polym12112660
협약과제
20ZS1200, 인간중심의 자율지능시스템 원천기술연구, 김도현
초록
Poly(dimethylsiloxane) (PDMS) has been extensively used as an electroactive polymer material because it exhibits not only excellent moldability but also mechanical properties sufficient enough for electroactive performance despite low dielectric permittivity. Its low dielectric property is due to its molecular non-polarity. Here, we introduce a polar group into a PDMS elastomer by using vinyl acetate (VAc) as a crosslinker to improve the dielectric permittivity. We synthesized a high-molecular weight PDMS copolymer containing vinyl groups, namely poly(dimethylsiloxane-co-methylvinylsiloxane) (VPDMS), and prepared several of the VPDMS solutions in VAc. We obtained transparent PDMS films by UV curing of the solution layers. Electromechanical actuation-related physical properties of one of the UV-cured films were almost equivalent to or superior to those of platinum-catalyzed hydrosilylation-cured PDMS films. In addition, saponification of the UV-cured film significantly improved the electrical and mechanical properties (?쎻?? ~ 44.1 pF/m at 10 kHz, E ~ 350 kPa, ?? ~ 320%). The chemical introduction of VAc into PDMS main chains followed by saponification would offer an efficacious method of enhancing the electroactive properties of PDMS elastomers.
KSP 제안 키워드
Dielectric elastomer(DE), Dielectric properties, Electro active polymer(EAP), Electroactive properties, Electromechanical actuation, Low dielectric, Mechanical properties(PMCs), PDMS elastomer, PDMS films, Physical Properties, Platinum-catalyzed
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