Type Of Electroactive Polymer Research Articles

Deformation mechanisms of electrostrictive graft elastomer

The electrostrictive graft elastomer is a new type of electroactive polymer. Recentlydeveloped by NASA, it consists of flexible backbone chains, each with side chains, calledgrafts. Neighboring backbone grafts physically cross-link and form crystal units. Theflexible backbone chain and the crystal graft unit consist of polarized monomers, whichcontain atoms with electric partial charges, generating dipole moments. When theelastomer is placed into an electric field, external rotating moments are applied to thedipole moment. This stimulates electrostrictive strain in the graft elastomer. In this paper,the deformation of the elastomer under the action of an electric field is explained by meansof two dominant mechanisms: crystal graft unit rotation and backbone chain reorientation.A two-dimensional computational model is established to analyze the deformation.

Near-infrared electroluminescence in polymer composites based on organic nanocrystals

IR electroluminescence was revealed in single-layer light-emitting diodes based on a type of electroactive polymer nanocomposites-electron-hole conducting aromatic polyimide and organic nanocrystalline particles of cyanine molecules, known as J-aggregates. These materials exhibit a very narrow emission band with a maximum at 815 nm. Dramatic increase of charge-carrier mobility was observed for these layers containing the J-aggregate nanocrystalline phase.