Novel silicone compatible cross-linkers for controlled functionalization of PDMS networks

Frederikke Bahrt Madsen, Anders Egede Daugaard, Søren Hvilsted, Anne Ladegaard Skov

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Polydimethylsiloxane (PDMS) elastomers are excellent materials for dielectric electroactive polymers (DEAPs) due to their high efficiency and fast response. PDMS suffers, however, from low dielectric permittivity and high voltages are therefore required when the material is used for DEAP actuators. In order to improve the dielectric properties of PDMS a novel system is developed where push-pull dipoles are grafted to a new silicone compatible cross-linker. The grafted cross-linkers are prepared by reaction of two different push-pull dipole alkynes as well as a fluorescent alkyne with the new azide-functional cross-linker by click chemistry. The dipole cross-linkers are used to prepare PDMS elastomers of various chains lengths providing different network densities. The functionalized cross-linkers are incorporated successfully into the networks and are well distributed as determined by the fluorescent functional cross-linker and fluorescence microscopy. The thermal, mechanical and electro-mechanical properties of PDMS elastomers of 0 wt% to 3.6 wt% of push-pull dipole cross-linker are investigated. An increase in the dielectric permittivity of 19 % at only 0.46 wt% of pure push-pull dipole is observed. Furthermore, the dielectric losses are found to be very low while the electrical breakdown strengths are high and adequate for DEAP applications. © 2013 SPIE.
Original languageEnglish
Title of host publicationProceedings of SPIE : The International Society for Optical Engineering
Number of pages13
PublisherSPIE - International Society for Optical Engineering
Publication date2013
Article number86871H
ISBN (Print)9780819494702
Publication statusPublished - 2013
EventElectroactive Polymer Actuators and Devices 2013 - Town & Country Resort and Convention Center, San Diego, California, United States
Duration: 11 Mar 201314 Mar 2013


ConferenceElectroactive Polymer Actuators and Devices 2013
LocationTown & Country Resort and Convention Center
CountryUnited States
CitySan Diego, California
SeriesProceedings of SPIE, the International Society for Optical Engineering


  • Actuators
  • Conducting polymers
  • Crosslinking
  • Dielectric losses
  • Dielectric materials
  • Elastomers
  • Electroactive polymer actuators
  • Fluorescence
  • Fluorescence microscopy
  • Grafting (chemical)
  • Hydrocarbons
  • Microchannels
  • Permittivity
  • Plastics
  • Silicones

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