Abstract:
A polymeric composite of an organic polymer and an inorganic glassy polymer and a process for making such composites which are useful as protective coatings and as nonlinear optical elements.
Abstract:
The invention concerns a method for the chemical modification of a surface based on the reaction of photolytically generated reactive intermediates derived from azido heterocycles with said surface.
Abstract:
A catalyst comprising A) a stationary acid component selected from the group consisting of a perfluorinated ion exchange polymer on an inert support, a silane modified perfluorosulfonic acid, and a sulfated metal oxide; and B) a mobile acid component selected from the group consisting of chlorosulfonic acid, fluorosulfonic acid, a fluorinated monosulfonic acid, a fluorinated sulfonimide, a fluorinated disulfonic acid, and an adjunct acid mixture is disclosed.
Abstract:
A catalyst comprising A) a stationary acid component selected from the group consisting of a perfluorinated ion exchange polymer on an inert support, a silane modified perfluorosulfonic acid, and a sulfated metal oxide; and B) a mobile acid component selected from the group consisting of chlorosulfonic acid, fluorosulfonic acid, a fluorinated monosulfonic acid, a fluorinated sulfonimide, a fluorinated disulfonic acid, and an adjunct acid mixture is disclosed.
Abstract:
A catalyst comprising A) a stationary acid component selected from the group consisting of a perfluorinated ion exchange polymer on an inert support, a silane modified perfluorosulfonic acid, and a sulfated metal oxide; and B) a mobile acid component selected from the group consisting of chlorosulfonic acid, fluorosulfonic acid, a fluorinated monosulfonic acid, a fluorinated sulfonimide, a fluorinated disulfonic acid, and an adjunct acid mixture is disclosed.
Abstract:
A sol-gel process is disclosed for preparing MTiOXO.sub.4 when M is K, Rb, Tl and/or NH.sub.4 and X is P and/or As which involves dissolving suitable compounds of M, Ti and X in stoichiometic amounts in a suitable organic liquid, and then producing crystalline MTiOXO.sub.4 using procedures including hydrolysis, condensation, solidification and pyrolysis. Bulk material and films (e.g., films of KTP on a single crystal silicon substrate) may be produced. Compositions comprising films of said MTiOXO.sub.4 produced by this process are disclosed.
Abstract:
Disclosed herein are organic polymeric fibers containing inorganic whiskers. The fibers are made from polymers which are anisotropic. Such polymers include, for example, certain aramids and polybenzobisthiazoles. The physical properties of the fibers are improved, and are useful, for example, in ropes and composites.
Abstract:
A process for etching with a scanning tunneling microscope on both a single crystal and a thin film of high temperature superconductor is disclosed.