Described herein are facile, one-step initiated plasma enhanced chemical vapor deposition (iPECVD) methods of synthesizing hyper-thin (e.g., sub-100 nm) and flexible metal organic covalent network (MOCN) layers. As an example, the MOCN may be made from zinc tetraphenylporphyrin (ZnTPP) building units. When deposited on a membrane support, the MOCN layers demonstrate gas separation exceeding the upper bounds for multiple gas pairs while reducing the flux as compared to the support alone.

A polymer film comprises a polymer composition containing (A) a cyclic olefin polymer and (B) a chlorine-containing polymer. The chlorine-containing polymer (B) may comprise a vinylidene chloride-series polymer. The cyclic olefin polymer (A) may comprise a cyclic olefin copolymer. The ratio of the chlorine-containing polymer (B) relative to 100 parts by weight of the cyclic olefin polymer (A) may be 0.5 to 60 parts by weight. The film has a moderate releasability from an electrolyte membrane and an electrode membrane of a polymer electrolyte fuel cell and a moderate adhesion to the electrolyte membrane and the electrode membrane and can adhere to a commonly-used substrate film without interposition of an adhesive layer such as an easily adhesive layer. The film is thus suitable as a release film for producing a membrane electrode assembly of a polymer electrolyte fuel cell.

A polymer film comprises a polymer composition containing (A) a cyclic olefin polymer containing an olefin unit having a C.sub.3-10alkyl group as a side chain thereof and (B) a chlorine-containing polymer. The chlorine-containing polymer (B) may comprise a vinylidene chloride-series polymer. The ratio of the chlorine-containing polymer (B) relative to 100 parts by weight of the cyclic olefin polymer (A) may be 0.5 to 60 parts by weight. The film has a moderate releasability from an electrolyte membrane and an electrode membrane of a polymer electrolyte fuel cell and a moderate adhesion to the electrolyte membrane and the electrode membrane and can adhere to a commonly-used substrate film without interposition of an adhesive layer such as an easily adhesive layer. The film is thus suitable as a release film for producing a membrane electrode assembly of a polymer electrolyte fuel cell.

A functional film and a method for manufacturing the same are provided. The functional film includes a polyurethane resin matrix and a plastic optical molding material. In the functional film, a content of the polyurethane resin matrix is between 48 wt % and 95 wt %, and a content of the plastic optical molding material is between 5 wt % and 50 wt %. The functional film further includes an ultraviolet absorber, an antioxidant additive, and an antibacterial additive. The functional film satisfies following test standards: (1) reaching level 4 of a phenolic yellowing test; (2) passing at least 60 hours of a QUV (ASTM G154) test; (3) passing at least four weeks of a water decomposition resistance test under the test conditions of 70 C. and 95% relative humidity; and (4) passing at least one certification of Global Recycle Standard (GRS) and Recycled Claim Standard (RCS).

A low dielectric high Tg resin composition includes a resin system, a halogen-free flame retardant, a coupling agent, and an inorganic filler. The resin system includes a low dielectric resin, a crosslinking agent, and a polyindene resin which are each added in a specific weight percentage. The low dielectric resin is formed from a monomer composition including styrene, divinylbenzene, and ethylene. Therefore, the low dielectric high Tg resin composition has a glass transition temperature not less than 200 C., and the low dielectric high Tg resin composition after being cured has a dielectric constant (Dk) between 3.0 and 3.2 and a dielectric loss factor (Df) less than 0.0013 at 10 GHz. Based on the above, a prepreg and a metal clad laminate applying the low dielectric high Tg resin composition are further provided.

A resin composition, including resin and imidazole, is provided. The resin includes cyanate ester resin and bismaleimide resin, and the imidazole does not have acidic hydrogen.

A cyclic olefin copolymer comprises a structural unit represented by Formula (I) and a structural unit represented by Formula (II) ##STR00001##
In the structural unit represented by Formula (II), R.sup.1 and R.sup.2 independently represent hydrogen, acryloyloxy [CH.sub.2CHC(O)O] or (methacryloyloxy)ethyleneoxy [CHCH.sub.3CHC(O)OC.sub.2H.sub.5O], with the proviso that R.sup.1 and R.sup.2 are not both hydrogen. The present invention also provides a curable composition comprising the cyclic olefin copolymer described above, a composite product comprising a substrate and a cured product formed from the curable composition, and a laminate comprising the cured product or the composite product.

A cyclic olefin copolymer comprises a structural unit represented by Formula (I) and a structural unit represented by Formula (II)

##STR00001##

In the structural unit represented by Formula (II), R.sup.1 and R.sup.2 independently represent hydrogen, acryloyloxy [CH.sub.2CHC(O)O] or (methacryloyloxy)ethyleneoxy [CHCH.sub.3CHC(O)OC.sub.2H.sub.5O], with the proviso that R.sup.1 and R.sup.2 are not both hydrogen. The present invention also provides a curable composition comprising the cyclic olefin copolymer described above, a composite product comprising a substrate and a cured product formed from the curable composition, and a laminate comprising the cured product or the composite product.

Embodiments in accordance with the present invention encompass compositions containing a blend of polymers formed from a variety of polycycloolefinic monomers at least one of which monomer contains an olefinic functionality and another monomer contains an anhydride functionality, melamine, montmorillonite and optionally other fillers such as silica, a crosslinker, a free radical initiator, a tackifier and one or more suitable additives. The compositions of this invention can be formed into a variety of three-dimensional insulating articles upon exposure to suitable high temperature, such as for example films. The objects formed from the compositions of this invention exhibit hitherto unattainable low dielectric constant and low-loss properties, fire retardancy and very high thermal properties. The compositions of this invention are useful in various applications, including as insulating materials in millimeter wave radar antennas, among others. The films formed from the compositions of this invention exhibit a UL-94 rating of at least V-1, dielectric constant (Dk) less than 2.8 and dielectric dissipation factor (Df) of less than 0.002.