Abstract: A sample holder for diffraction analysis protects air or moisture sensitive samples and accommodates samples of different sizes, both without contributing to background noise. In particular, a sample holder for beam diffractometery includes a holder body having a substantially flat beam-facing top surface and a through-hole extending through the top surface, a piston fitted in the through-hole so as to travel along an axis of the through-hole, and a cup-shaped cap fitted over at least a portion of the top surface, surrounding the through-hole. To minimize background noise, the top surface of the holder body and a top surface of the piston are made of quartz. For sample loading, a substantially flat plate and a mechanism for removably attaching the plate so as to overlie the top surface of the holder body are provided. The cap may be made of thin plastic so as to not affect the incident X-ray beam.

Abstract: This invention is directed to solid electrolytes containing a solvent and, in particular, a solvent comprising certain substituted tetrahydrofurans, substituted 1,3-dioxolanes, substituted 1,4-dioxanes, and substituted tetrahydropyrans.

Abstract: Chromogenic solvent detectors are used to detect and map the presence of organic solvent-containing materials on a surface. The detector need only be applied to the surface to be tested. When removed, the dark areas on the detector correspond to those areas of the surface where an organic solvent-containing material was present. This method can be used to test the release properties of a release film.

Abstract: A two-stage evaporative method for recovering polymerizable 2-pyrrolidone from alkaline aqueous solutions such as those obtained by washing the catalyst from an incompletely reacted polypyrrolidone polymerizate, includes the steps of neutralizing the base with mineral acid, removing most of the water in an initial reduced pressure evaporation and recovering the pyrrolidone from a salt/pyrrolidone slurry by vaporization under reduced pressure.

Abstract: Certain sulfonic acid derivatives function as promoters of the anionic polymerization of 2-pyrrolidone.

Abstract: A process for polymerizing 2-pyrrolidone utilizing an agitated reaction mixture containing an inert nonsolvent and an insoluble salt in order to produce a particulate, or easily comminuted, solid product.

Abstract: An improved process for the production of poly-2-pyrrolidone in which the solid product is washed with monomer to remove the catalyst and the monomer wash, containing catalyst and monomer, is recycled for further polymerization reaction.

Abstract: 2-PYRROLIDONE IS SEPARATED FROM AQUEOUS SOLUTION BY PHASE SEPARATION IN THE PRESENCE OF POTASSIUM HYDROGEN PHOSPHATE.

Abstract: An ultraviolet protectorant composition is provided for surface application by aerosol to polyolefins. The composition consists of an ultraviolet protectorant, a binder and solvent.

Abstract: Effective inhibition of the ultraviolet degradation of a poly-1-olefin is accomplished by the incorporation of a certain finely divided metallic nickel into the polymer.

Abstract: Extra-wide, heat-sealed nonwoven sheets of thermoplastic synthetic polymer monofilaments are prepared by folding said sheets in layers with heat-insulating fabric between said layers before contact with heating and pressing means to effect heat sealing, followed by removal of the insulating fabric and heat sealing of the fold areas.

Abstract: Vinylpyridine is polymerized in aqueous suspension in the presence of small solid particles of polyolefin.