Abstract: In one embodiment this invention provides a nonlinear optical medium which is a composite of a polymer matrix which exhibits nonlinear optic response, and a silver colloid which is dispersed in the polymer matrix.

Abstract: This invention relates to a process for the production of high strength polybenzimidazole filaments and molded products made from such filaments. The filaments produced by this process contain from about 10 to about 50 percent by weight residual solvent and can be heated at a temperature of about 350.degree. C. to about 600.degree. C. to produce three-dimensional foamed articles.

Abstract: A method for the activation of polyethylene terephthalate materials such as tire yarns is provided whereby the adhesion of the material to an adhesive is enhanced. The material is activated by means of an electron beam to promote free radical formation, which free radicals are permitted to form carboxyl and hydroxyl functionalities under ambient conditions. Such functionalities improve the adhesion with a suitable adhesive such as an epoxy or isocyanate adhesive which is reactive to carboxyl or hydroxyl functionalities and which may be applied to the material before or after activation thereof.

Abstract: In one embodiment this invention provides an improved Langmuir-Blodgett procedure for producing a nonlinear optical medium consisting of a transparent substrate coated with a continuous film of at least one monomolecular layer of uniaxially aligned surface active organic molecules which exhibit nonlinear optical susceptibility.

Abstract: Finish liquid is applied to a bundle of running filamentary material by running the bundle of filamentary material in monolayer form through a passage and conducting finish liquid under pressure through at least two side-by-side capillaries each having a diameter less than 0.06 inches. The finish liquid is discharged through outlet ends of the capillaries and onto the running monolayer of filamentary material. Preferably, the capillaries are separated by a divider wall which terminates short of the outlet ends of the capillaries, whereby those outlet ends define a slot through which the finish liquid is discharged. The slot preferably has end portions which are narrower than a center portion of the slot.

Abstract: Surface modification of polyester material is obtained by contacting the material in substantially non-crystallized form with a non-crystallizable oligomer. The oligomer has ester linkages and is prepared from a reaction mixture which includes at least one polyol having a functionality greater than three and selected from the group consisting of pentaerythritol, low molecular weight polymers of pentaerythritol, glycerol, low molecular weight polymers of glycerol and mixtures thereof. After contact with the oligomer, the polyester is crystallized. The modified polyester material exhibits improved properties such as hydrophilicity and/or adhesive bonding.

Abstract: A polyethylene terephthalate material (e.g., a filament or cord) is disclosed that exhibits desirable adhesive characteristics in rubber-reinforcing applications. An important aspect of the invention is the incorporation of a radiation-curable acrylate monomer in a spin finish coating or as a coating applied upon a spin finish coating, and the subsequent photopolymerization of the acrylate monomer by exposure of the coated filament or cord to a suitable radiation source. The surface-modified material thus shows an improved adhesion to phenolicformaldehyde-latex adhesives.