This invention relates to compositions and methods for improving the impact properties of polymer-matrix composites and to improving the adhesion of resin compositions to substrate materials. More particularly, the invention relates to compositions and methods for improving the impact properties of ring opening metathesis polymerization (ROMP) polymer-matrix composites and to improving the adhesion of ROMP compositions to substrate materials using adhesion promoters containing at least two isocyanate groups and functional elastomers comprising a maleic anhydride grafted styrene-ethylene/butylene-styrene hydrogenated copolymer in a resin composition. The polymer products produced via ROMP reactions of the invention may be utilized for a wide range of materials and composite applications. The invention has utility in the fields of polymer and materials chemistry and manufacture.

A laminated sheet includes a polymer layer selected from the group consisting of polyalkylene phthalate, polyalkylene isophthalate, polyalkylene terephthalate, and combinations thereof, and two poly(,,,-tetrafluoro-para-xylylene) layers respectively connected to two opposite surfaces of the polymer layer.

Films including a water-soluble layer and a vapor-deposited organic coating are disclosed. The films can optionally further include a vapor-deposited inorganic layer. The films exhibit enhanced barrier properties.

The invention provides a composition for adhering one or more polymers to a substrate. The composition comprises at least one first compound adapted to be coated on a surface of the substrate. The first compound comprises one or more first units each having at least one functional group adapted to chemically react with at least one monomer to form the one or more polymers. Said composition also comprises at least one second compound adapted to be coated on the surface of the substrate. The second compound comprising one or more second units interspersed among the one or more first units of the first compound. Each of the one or more second units is not chemically reactive to the at least one monomer. The invention also provides a method of preparing a polymer coated surface on a substrate using the composition described.

The present invention provides a 3D porous structure of parylene including a poly-p-xylylenes structure having a plurality of pores. The poly-p-xylylenes structure has a porosity. According to an embodiment of the present invention, the size of the porous structure is between 20 nm and 5 cm. According to an embodiment of the present invention, the porosity is between 55% and 85%. According to an embodiment of the present invention, the porous structure further includes a plurality of target molecules. According to an embodiment of the present invention, the pores of the poly-p-xylylenes structure include pore sizes of different sizes. The pore sizes are varying in a gradient. According to an embodiment of the present invention, the porous structure is formed integrally.

This invention relates to compositions and methods for improving the impact properties of polymer-matrix composites and to improving the adhesion of resin compositions to substrate materials. More particularly, the invention relates to compositions and methods for improving the impact properties of ring opening metathesis polymerization (ROMP) polymer-matrix composites and to improving the adhesion of ROMP compositions to substrate materials using adhesion promoters containing at least two isocyanate groups and functional elastomers comprising a maleic anhydride grafted styrene-ethylene/butylene-styrene hydrogenated copolymer in a resin composition. The polymer products produced via ROMP reactions of the invention may be utilized for a wide range of materials and composite applications. The invention has utility in the fields of polymer and materials chemistry and manufacture.

Polyparaxylylene (PPX) polymers that can be expanded into porous articles that have a node and fibril microstructure are provided. The fibrils contain PPX polymer chains oriented with the fibril axis. The PPX polymer may contain one or more comonomer. PPX polymer articles may be formed by applying PPX to a substrate by vapor deposition. The nominal thickness of the PPX polymer film is less than about 50 microns. The PPX polymer film may be removed from the substrate to form a free-standing PPX polymer film, which may then be stretched into a porous article. Alternatively, a PPX polymer article can be formed by lubricating PPX polymer powder, heating the lubricated powder, and calendering or ram extruding to produce a preform that can subsequently be stretched into a porous article. The heating and expansion temperatures are from about 80 C. to about 220 C. or from about 220 C. to about 290 C. or from about 290 C. to about 450 C.