Abstract:
The present invention provides a polymer electrolyte membrane with excellent proton conductivity in its thickness direction. Preferably, the polymer electrolyte membrane contains a polymer compound comprising an ionic segment having an ionic functional group and a nonionic segment having substantially no ionic functional group, and the phase containing ionic segments as a main component and the phase containing nonionic segments as a main component are phase-separated, and in the surface region thereof, the change in the amount of the ionic segment from the surface toward the interior substantially decreases monotonically.
Abstract:
The present invention provides a polymer electrolyte membrane with excellent proton conductivity in its thickness direction. Preferably, the polymer electrolyte membrane containing a polymer compound comprising an ionic segment having an ionic functional group and a nonionic segment having substantially no ionic functional group, and the phase containing ionic segments as a main component and the phase containing nonionic segments as a main component are phase-separated, and in the surface region thereof, the change in the amount of the ionic segment from the surface toward the interior substantially decreases monotonically.
Abstract:
The present invention provides a method for producing a copper-clad laminate, the method comprising the step of placing at least one copper foil onto a resin layer containing a liquid crystalline polymer so that the resin layer adheres to a surface of the copper foil, wherein the surface of the copper foil has 0.4 or more of a ratio of nickel concentration to copper concentration and has substantially no silicon detected when measured with X-ray photoelectron spectroscopy. The copper-clad laminate can sufficiently maintain excellent adhesion between the copper foil and the resin layer even under high temperature and humidity atmosphere.