1. Highly dielectric and flexible polyrotaxane elastomer by introduction of cyano groups
- Author
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Manabu Inutsuka, Yuki Hayashi, Aoi Inomata, Kohzo Ito, Hideaki Yokoyama, Katsunari Inoue, and Yasuhiro Sakai
- Subjects
Materials science ,Polymers and Plastics ,Organic Chemistry ,Insulator (electricity) ,Polyethylene glycol ,Dielectric ,Methacrylate ,Elastomer ,chemistry.chemical_compound ,chemistry ,PEG ratio ,Polymer chemistry ,Materials Chemistry ,Side chain ,High-κ dielectric - Abstract
A series of highly dielectric polyrotaxane derivatives consisting of axle polyethylene glycol (PEG) and threated α-cyclodextrins (CDs) were synthesized by modifying the hydroxyl groups of CDs with cyanoethyl or dicyanobutyl groups. We found that the introduction of poly(2-hydroxyethyl methacrylate) (PHEMA) side chain with a number of hydroxyl groups and subsequent cyanoethylation give particularly high dielectric constant (23.4), which is comparable to those of commercially available highly dielectric polymeric materials. We also succeeded in preparing a highly dielectric (e′ ∼ 16 at 10 kHz) and flexible (Young's modulus ∼ 3.4 MPa) elastomer film without any inorganic filler, which is a desirable material for insulator of dielectric elastomer actuators.
- Published
- 2015
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