摘要:
The substrates of the present invention comprise a polyimide base polymer derived at least in part from collinear monomers together with crankshaft monomers. The resulting polyimide material has been found to provide advantageous properties, particularly for electronics type applications.
摘要:
A process for making a composite ion exchange membrane including fabricating a layered membrane precursor including a microporous support of highly fluorinated nonionic polymer adhered to a layer of highly fluorinated sulfonyl halide polymer, hydrolyzing the layered membrane precursor to convert the highly fluorinated sulfonyl halide polymer to highly fluorinated sulfonate polymer, impregnating the microporous support with a dispersion of highly fluorinated sulfonate polymer or precursor thereof in a polar liquid medium after hydrolyzing, removing the polar liquid medium, and heating to coalesce the highly fluorinated sulfonated polymer in the support.
摘要:
An underground porosity water storage reservoir minimizes the impacts on surface uses of the reservoir site. Furthermore, a method of operating an underground porosity storage reservoir minimizes damage to the reservoir due to injecting sediment-laden water or water that is chemically incompatible with the porous material in the underground reservoir. The underground porosity water storage reservoir reduces temperature impacts on surface waters due to the discharge of stored water. A method of using the porosity storage reservoir to minimize adverse temperature impacts when discharging water to a surface body is disclosed.
摘要:
An underground porosity water storage reservoir minimizes the impacts on surface uses of the reservoir site. Furthermore, a method of operating an underground porosity storage reservoir minimizes damage to the reservoir due to injecting sediment-laden water or water that is chemically incompatible with the porous material in the underground reservoir. The underground porosity water storage reservoir reduces temperature impacts on surface waters due to the discharge of stored water. A method of using the porosity storage reservoir to minimize adverse temperature impacts when discharging water to a surface body is disclosed.