Enhancing relative permittivity by incorporating PDMS-PEG multi block copolymers in binary polymer blends

Aliff Hisyam A Razak, Peter Szabo, Anne Ladegaard Skov

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Abstract

Polydimethylsiloxanes (PDMS) are well-known to actuate with relatively large strains due to low modulus, but they possess lowpermittivity. Contrary, polyethyleneglycols (PEG) are not stretchable but possess high permittivity. Combination of the two polymers in a block copolymer depicts a possibility for substantial improvement of properties such as high permittivity, stretchability and non-conductivity – if carefully designed. The objective is to synthesize PDMS-PEG multiblock copolymer assembling into discontinuous morphologies in PEG based on variation of volume fractions of PDMS. The utilized synthesis of PDMS-PEG multiblock copolymer is based on hydrosilylation reaction, which is amended from Klasner et al.1 and Jukarainen etal.2 Variation in the ratio between the two constituents introduces distinctive properties in terms of dielectric permittivity and rheological behaviour. PDMS-PEG multiblock copolymers are, however, shown to be conductive (figure 1.a) and thus not capable of actuating. By incorporating conductive PDMS-PEG multiblock copolymers into commercial PDMS elastomer, the discontinuity in PEG can be obtained and the relative permittivity (ε’) is significantly enhanced 60% with 5wt% of PDMS-PEGblock copolymer incorporated in the PDMS network (figure 1.b).
Original languageEnglish
Publication date2015
Number of pages1
Publication statusPublished - 2015
Event5th International Conference on Electromechanically Active Polymer (EAP) Transducers & Artificial Muscles - Meriton Grand Conference & Spa hotel, Tallinn, Estonia
Duration: 9 Jun 201510 Jun 2015
Conference number: 5

Conference

Conference5th International Conference on Electromechanically Active Polymer (EAP) Transducers & Artificial Muscles
Number5
LocationMeriton Grand Conference & Spa hotel
CountryEstonia
CityTallinn
Period09/06/201510/06/2015

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