In some examples, a method includes forming a material layer on a substrate, partially polymerizing a component of the material layer, to form fluid-filled droplets within a partially polymerized matrix, deforming the material layer to form anisotropic fluid-filled droplets, and further polymerizing the partially polymerized matrix to form an anisotropic voided polymer, including anisotropic voids in a polymer matrix. The anisotropic voids may include anisotropic nanovoids. Example methods may further include depositing electrodes on the anisotropic voided polymer so that at least a portion of the anisotropic voided polymer is located between the electrodes. Examples may include forming electroactive elements including an anisotropic nanovoided polymer, and devices (such as sensors and/or actuators) including electroactive elements.

In some examples, a device includes a multilayer structure, a first electrode, and a second electrode, where the multilayer structure is located at least in part between the first electrode and the second electrode, and the multilayer structure includes a nanovoided polymer layer, and a solid layer. The solid layer may include a non-nanovoided layer. The nanovoided polymer layer may be an electroactive layer. The device may further include a control circuit configured to apply an electrical potential between the first electrode and the second electrode, which may induce a mechanical deformation of the multilayer.

There is provided a polyurethane and/or polyacrylic coating and/or film that includes a polyurethane and/or polyacrylic layer; a biodegradation-inducing additive in the polyurethane and/or polyacrylic layer at a concentration of between 0.1 to 6% by weight. This polyurethane and/or polyacrylic coating and/or film is biodegradable.

Methods of recording a volume Bragg grating are provided. A recording medium is formed from a matrix polymer precursor, an inimer comprising a polymerizable functional group and a controlled radical reactive group, a first photoinitiator system that is more reactive with the polymerizable functional group than the controlled radical reactive group in the presence of an excitation source, and a photoredox catalyst. The medium is cured thereby forming a support matrix. The medium is exposed to light causing the first photoinitiator system to react with the polymerizable functional group and to polymerize the inimer within the support matrix thus forming a latent grating image of the volume Bragg grating within the medium. The latent grating image comprises a plurality of bright fringes and a plurality of dark fringes. A concentration of polymerized inimer is higher in the plurality of bright fringes than in the plurality of dark fringes.

A polyurethane composition suitable for coating a surface of a substrate. The polyurethane composition can include an aliphatic polyester urethane matrix and a fluorinated ionic antistatic additive. The aliphatic polyester urethane matrix can comprise an aliphatic diisocyanate, a polyester polyol having a polyester diol and a polyester triol, and sulfonated polyester urethane polyol.

An example device includes a nanovoided polymer element, a first electrode, and a second electrode. The nanovoided polymer element may be located at least in part between the first electrode and the second electrode. In some examples, the nanovoided polymer element may include anisotropic voids. In some examples, anisotropic voids may be elongated along one or more directions. In some examples, the anisotropic voids are configured so that a polymer wall thickness between neighboring voids is generally uniform. Example devices may include a spatially addressable electroactive device, such as an actuator or a sensor, and/or may include an optical element. A nanovoided polymer layer may include one or more polymer components, such as an electroactive polymer.

A method for dielectrically heating foamable composition to foam and set the composition is described. In particular, radio frequency (RF) heating is used to heat the foamable composition to provide insulation in the manufacture of an article.

Various embodiments disclosed relate to pore inducers and porous abrasive forms made using the same. In various embodiments, the present invention provides a method of forming a porous abrasive form including heating an abrasive composition including pore inducers to form the porous abrasive form. During the heating the pore inducers in the porous abrasive form reduce in volume to form induced pores in the porous abrasive form.

The invention discloses a preparation method of highly transparent self-adhesive PBAT cling film. The raw materials include PBAT, ACR, glycerin, and glycerin fatty acid ester; the preparation methods include mixing, preparing pellets, film blowing, and film winding. In the invention, ACR is added into PBAT resin, which increases the ductility, shrinkage property and flatness of winding of PBAT cling films; glycerin can improve the extrusion stability, softness and adhesion properties of PBAT cling films; glycerin fatty acid ester can improve the anti-fog property of PBAT cling films; meanwhile, glycerin and glycerin fatty acid can play a synergistic role to further enhance the anti-fog property of PBAT cling films. The PBAT cling film prepared by the invention has superior physical property, high transparency, high adhesion property, high shrinkage property, smooth flatness of winding free of wrinkles and good air permeability.

A method for manufacturing an organic light emitting device includes: forming an organic light emitting display panel including a substrate provided on a support substrate, an organic light emitting element on the substrate, and a thin film encapsulating film covering the organic light emitting element; detaching the support substrate from the organic light emitting display panel; attaching a bottom protecting film to a bottom of the organic light emitting display panel, the bottom protecting film comprising a first electricity removing layer configured to remove static electricity; and cutting the organic light emitting display panel into a plurality of organic light emitting devices.