Citation: Zhanbin Feng, Jiafang Guo, Suting Liu, Guofei Feng, Xing-Hong Zhang. Poly(thioether)-b-polysiloxane-b-poly(thioether) triblock copolymer towards homogeneous dielectric elastomer with high dielectric performance[J]. Chinese Chemical Letters, ;2022, 33(8): 4021-4025. doi: 10.1016/j.cclet.2021.11.091 shu

Poly(thioether)-b-polysiloxane-b-poly(thioether) triblock copolymer towards homogeneous dielectric elastomer with high dielectric performance

Zhanbin Feng ^{a, b} ,
Jiafang Guo ^a ,
Suting Liu ^c ,
Guofei Feng ^a ,
Xing-Hong Zhang ^{a, b, *,}

a.
MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
b.
Center of Chemistry for Frontier Technologies, Zhejiang University, Hangzhou 310027, China
c.
Department of Chemical Engineering, Weifang Vocational College, Weifang 262737, China

xhzhang@zju.edu.cn

Received Date: 8 October 2021
Revised Date: 27 November 2021
Accepted Date: 29 November 2021
Available Online: 5 December 2021

Figures(5)

Dielectric elastomers (DEs) have drawn much attention owing to their application prospects in artificial muscles and soft robotics, it is still a big challenge to prepare DEs with high electromechanical performances. This work reports a highly stretchable poly(thioether)-b-polysiloxane-b-poly(thioether) triblock copolymer based homogenous DEs with high electromechanical properties. The triblock copolymer (PSiPGE) was synthesized through the ring-opening polymerization (ROP) of phenyl glycidyl ether (PGE) and carbonyl sulfide (COS) catalyzed by silicon alkoxides. The dipoles (benzene rings) on the side groups of PSiPGE improved the dipole polarizations and the phase separation structure of this triblock copolymer enhanced the interfacial polarizations between poly(thioether) and polysiloxane, and thus improving the dielectric constant (ε', up to 5.8). In addition, the PSiPGE exhibited low elastic modulus (Y, 0.04 MPa), and thus possessed high electromechanical sensitivity (β, ~145 MPa⁻¹) which is much higher than that of most homogenous DEs. This work provides a new strategy to construct homogenous DEs with excellent electromechanical performances, leading to a greater application aspect in the actuated devices.
- Poly(thioether)-b-polysiloxane-b-poly(thioether) triblock copolymer,
- Homogenous,
- Dielectric elastomer,
- Phase separation,
- Electromechanical performance
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