Abstract: A polymeric composition comprising modified-TiO2 nanoparticles, with or without a solvent, and polymer precursors; wherein the modified-TiO2 nanoparticles comprise titanium dioxide nanoparticles modified with a short-chain unsaturated compound comprising 2 to 10 carbon atoms. The polymeric composition may be used in dental compositions such as dental adhesives, dental composites, and dental sealants.

Abstract: The present invention is an apparatus and method for enhancing the electromagnetic signal of a sample for ellipsometry which uses at least one auxiliary layer and at least one substrate layer.

Abstract: A method and apparatus for characterizing bonding properties in compositions which utilizes thermal energy to cause controlled debonding of interface and/or interply bonds. Debonding events resulting from the controlled debonding are detected and utilized to characterize the interface and/or interply properties of the composition.

Abstract: Polyethylene yarns having tenacities of at least 12 grams per denier are produced at commercially feasible spinning speeds by a process in which a high density polyethylene having a M.sub.n of at least 20,000 and a M.sub.w of less than 125,000 is extruded through a high temperature spinneret (220.degree.-335.degree. C.) to form yarns which are hot-drawn at a temperature between about 115.degree. and 132.degree. C. The yarns produced by this process are particularly useful as industrial cordage.

Abstract: A spin-texture process for producing crimped synthetic filaments is described in which freshly extruded filaments are passed over a 20.degree. C.-180.degree. C. roll before they are completely solidified and fully drawn as they leave the roll. In the case of polyamide filaments, spontaneous crimp as well as latent crimp is observed.

Abstract: Polyethylene yarns having tenacities of at least 12 grams per denier are produced at commercially feasible spinning speeds by a process in which a high density polyethylene having a M.sub.n of at least 20,000 and a M.sub.w of less than 125,000 is extruded through a high temperature spinneret (220.degree.-335.degree. C.) to form yarns which are hot-drawn at a temperature between about 115.degree. and 132.degree. C. The yarns produced by this process are particularly useful as industrial cordage.

Abstract: Yarns of phenylene oxadiazole/N-alkylhydrazide copolymers are made by a wet spinning process involving the steps of extruding, coagulating, washing, drying, hot-drawing and collecting. These yarns when formed into cord lose considerable tenacity, that is, cords plied from these yarns have considerably less tenacity than the individual yarns making up the cords. It has been found that this loss in tenacity in forming cords can be significantly reduced by applying a certain zirconium-containing finish to the yarn during its preparation. The finish is applied after the yarn is washed and while it is still wet.