Abstract: The present invention is directed to novel functionalized spirocentric compounds and polymers thereof that produce hyper-rigid cross-linked membranes.

Abstract: The present invention is directed to methods of fabricating novel cross-linked membranes and to cross-linked membranes produced by the disclosed methods. Specifically, methods of fabricating cross-linked membranes according to the present invention may comprise direct crosslinking, crosslinking by addition of a small molecule, interfacial crosslinking of free-standing film, and interfacial crosslinking on a solid support.

Abstract: A method for providing a mechanical seal assembly involves the steps of: providing first and second flanges (10) of standard configuration; providing a metallic seal element (32) having first and second faces, wherein each face includes an annular seal surface (42); and modifying each of said first and second flanges in order to produce a new metallic seal surface (28); wherein the annular seal surface (32) on each of the first and second faces of the metallic seal element is complimentary to the new metallic seal surfaces (28) of the respective first and second flanges for sealing engagement therewith.

Abstract: A mechanical seal assembly has a first flange (10) and a second flange (10). The body of each flange defines a recess adjacent a flange connection face and wherein said recess includes an annular metallic seal surface (28). A metallic seal element (32) is locatable between the first and second flanges. First and second faces of the metallic seal element include an annular seal surface (42). The seal element is configured to be clamped between the two flange bodies (10), to create a metal-to-metal seal between the respective annular seal surface (42) of the seal element and the metallic seal surface (28) of a respective flange body.

Abstract: The present invention is directed to novel functionalized spirocentric compounds and polymers thereof that produce hyper-rigid cross-linked membranes.

Abstract: The present invention is directed to methods of fabricating novel cross-linked membranes and to cross-linked membranes produced by the disclosed methods. Specifically, methods of fabricating cross-linked membranes according to the present invention may comprise direct crosslinking, crosslinking by addition of a small molecule, interfacial crosslinking of free-standing film, and interfacial crosslinking on a solid support.

Abstract: A method for providing a mechanical seal assembly involves the steps of: providing first and second flanges (10) of standard configuration; providing a metallic seal element (32) having first and second faces, wherein each face includes an annular seal surface (42); and modifying each of said first and second flanges in order to produce a new metallic seal surface (28); wherein the annular seal surface (32) on each of the first and second faces of the metallic seal element is complimentary to the new metallic seal surfaces (28) of the respective first and second flanges for sealing engagement therewith.

Abstract: A mechanical seal assembly has a first flange (10) and a second flange (10). The body of each flange defines a recess adjacent a flange connection face and wherein said recess includes an annular metallic seal surface (28). A metallic seal element (32) is locatable between the first and second flanges. First and second faces of the metallic seal element include an annular seal surface (42). The seal element is configured to be clamped between the two flange bodies (10), to create a metal-to-metal seal between the respective annular seal surface (42) of the seal element and the metallic seal surface (28) of a respective flange body.