Dielectric Elastomers UV-Cured from Poly(dimethylsiloxane) Solution in Vinyl Acetate
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 it...
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doaj-f121481e424b409fa9554c5b4a595d342020-11-25T04:00:16ZengMDPI AGPolymers2073-43602020-11-01122660266010.3390/polym12112660Dielectric Elastomers UV-Cured from Poly(dimethylsiloxane) Solution in Vinyl AcetateSeung Koo Park0Meejeong Choi1Dong Wook Kim2Bong Je Park3Eun Jin Shin4Suntak Park5Sungryul Yun6Human Enhancement & Assistive Technology Research Section, Electronics and Telecommunications Research Institute, 218 Gajeong-ro, Yuseong-gu, Daejeon 34129, KoreaHuman Enhancement & Assistive Technology Research Section, Electronics and Telecommunications Research Institute, 218 Gajeong-ro, Yuseong-gu, Daejeon 34129, KoreaAdvanced Materials Division, Korea Research Institute of Chemical Technology, 141 Gajeong-ro, Yuseong-gu, Daejeon 34114, KoreaHuman Enhancement & Assistive Technology Research Section, Electronics and Telecommunications Research Institute, 218 Gajeong-ro, Yuseong-gu, Daejeon 34129, KoreaHuman Enhancement & Assistive Technology Research Section, Electronics and Telecommunications Research Institute, 218 Gajeong-ro, Yuseong-gu, Daejeon 34129, KoreaHuman Enhancement & Assistive Technology Research Section, Electronics and Telecommunications Research Institute, 218 Gajeong-ro, Yuseong-gu, Daejeon 34129, KoreaHuman Enhancement & Assistive Technology Research Section, Electronics and Telecommunications Research Institute, 218 Gajeong-ro, Yuseong-gu, Daejeon 34129, KoreaPoly(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 (ɛ′ ~ 44.1 pF/m at 10 kHz, E ~ 350 kPa, ɛ ~ 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.https://www.mdpi.com/2073-4360/12/11/2660elastomerpoly(dimethylsiloxane)photocuringvinyl acetatesaponificationpermittivity |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Seung Koo Park Meejeong Choi Dong Wook Kim Bong Je Park Eun Jin Shin Suntak Park Sungryul Yun |
spellingShingle |
Seung Koo Park Meejeong Choi Dong Wook Kim Bong Je Park Eun Jin Shin Suntak Park Sungryul Yun Dielectric Elastomers UV-Cured from Poly(dimethylsiloxane) Solution in Vinyl Acetate Polymers elastomer poly(dimethylsiloxane) photocuring vinyl acetate saponification permittivity |
author_facet |
Seung Koo Park Meejeong Choi Dong Wook Kim Bong Je Park Eun Jin Shin Suntak Park Sungryul Yun |
author_sort |
Seung Koo Park |
title |
Dielectric Elastomers UV-Cured from Poly(dimethylsiloxane) Solution in Vinyl Acetate |
title_short |
Dielectric Elastomers UV-Cured from Poly(dimethylsiloxane) Solution in Vinyl Acetate |
title_full |
Dielectric Elastomers UV-Cured from Poly(dimethylsiloxane) Solution in Vinyl Acetate |
title_fullStr |
Dielectric Elastomers UV-Cured from Poly(dimethylsiloxane) Solution in Vinyl Acetate |
title_full_unstemmed |
Dielectric Elastomers UV-Cured from Poly(dimethylsiloxane) Solution in Vinyl Acetate |
title_sort |
dielectric elastomers uv-cured from poly(dimethylsiloxane) solution in vinyl acetate |
publisher |
MDPI AG |
series |
Polymers |
issn |
2073-4360 |
publishDate |
2020-11-01 |
description |
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 (ɛ′ ~ 44.1 pF/m at 10 kHz, E ~ 350 kPa, ɛ ~ 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. |
topic |
elastomer poly(dimethylsiloxane) photocuring vinyl acetate saponification permittivity |
url |
https://www.mdpi.com/2073-4360/12/11/2660 |
work_keys_str_mv |
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