The present invention provides a polyamic acid composition, which, in a cured state on a substrate of amorphous or crystalline silicon, has an adhesion of 0.05-0.1 N/cm with the amorphous or crystalline silicon.

There is provided a water-soluble film containing polyvinyl alcohol resin, wherein a ratio RSm (LD/TD) is 1.2 or greater and 2.5 or less, where the RSm (LD/TD) is the ratio of an average length RSm (LD) of roughness curve elements on at least one film surface in the longitudinal direction to an average length RSm (TD) of roughness curve elements on the same film surface in the transverse direction. This allows provision of a water-soluble film that can be suitably used for manufacturing a package with excellent uniformity of seal strength, even for manufacturing a package with excellent uniformity of seal strength during high-speed sealing; and a package using the film.

The invention relates to the fabrication of membranes based on polyphenylene-based polymers—and more particularly, for example, quaternary ammonium functionalized polyphenylene-based polymers—utilizing a class of green sustainable organic solvents, such as cyclic ketones, by casting or coating for use in high temperature polymer electrolyte membrane fuel cells or water electrolyzers.

A composite core material and methods for making same are disclosed herein. The composite core material comprises mineral filler discontinuous portions disposed in a continuous encapsulating resin. Further, the method for forming a composite core material comprises the steps of forming a mixture comprising mineral filler, an encapsulating prepolymer, and a polymerization catalyst; disposing the mixture onto a moving belt; and polymerizing said encapsulating prepolymer to form a composite core material comprising mineral filler discontinuous portions disposed in a continuous encapsulating resin.

A composite core material and methods for making same are disclosed herein. The composite core material comprises mineral filler discontinuous portions disposed in a continuous encapsulating resin. Further, the method for forming a composite core material comprises the steps of forming a mixture comprising mineral filler, an encapsulating prepolymer, and a polymerization catalyst; disposing the mixture onto a moving belt; and polymerizing said encapsulating prepolymer to form a composite core material comprising mineral filler discontinuous portions disposed in a continuous encapsulating resin.

A method of making a polymer article comprises the steps of making a polymer solution by mixing a first compound containing carbodiimide groups with a second compound containing carboxylated groups, applying the polymer solution to a former, wherein the step of applying occurs within 2 hours of the making of the polymer solution, and curing the polymer solution. The polymer solution can have a pH adjuster consisting of ammonium hydroxide.

Polymer matrix composite comprising a porous polymeric network; and a plurality of thermally conductive particles distributed within the polymeric network structure; wherein the thermally conductive particles are present in a range from 15 to 99 weight percent, based on the total weight of the thermally conductive particles and the polymer (excluding the solvent); and wherein the polymer matrix composite has a density of at least 0.3 g/cm.sup.3; and methods for making the same. The polymer matrix composites are useful, for example, in electronic devices.

Provided among other things is an polymeric protective garment comprising a layer of carboxylated polymer that incorporates an alumina-silica composition, thus forming a silica alumina polymer composite.

A latex composition for dip molding having an excellent flow mark property and syneresis property and being capable of providing a molded article having excellent tensile properties and texture is provided. A method of preparing the latex composition, and a dip-molded article produced using the latex composition are also provided.

A dental article includes at least one segment defining a complex three-dimensional shape configured to follow contours of an oral anatomy, in which the at least one segment includes a core component including a majority of parylene.