Abstract:
A bifunctional polymer is functionalized at one end with an azlactone end group to conjugate biomolecules of interest, and is functionalized at another end with an azide anchor group to attach the polymer to a substrate. Methods of making the bifunctional polymer are also provided. A coated substrate includes the bifunctionalized polymers on the surface of a substrate. Methods of making the coated substrate are also provided. A microarray includes a plurality of discrete regions, each region including the coated substrate.
Abstract:
The present invention relates to preparation of heterogeneous mixtures of (carboxylated) vinyl ester/ ethylene dispersions, such as vinyl acetate/ethylene (VAE) dispersions with polyamideamine-epichlorohydrin (PAE) wet strength resins having a reduced amount of halogenated organic compounds, such as less than 1500 ppm. The dispersion offers extremely low free and bound formaldehyde levels combined with wet tensile strength for use in non-woven textile and paper applications.
Abstract:
La présente invention concerne une composition réactive précurseur de matériau composite thermoplastique comprenant des fibres de renfort et une matrice à base de polymère thermoplastique polyamide semi-cristallin imprégnant lesdites fibres, ladite composition comprenant a1) au moins un prépolymère polyamide semi-cristallin aminé (porteur de -NH 2 ) dudit polymère thermoplastique de la matrice et a2) un allongeur de chaîne, non polymérique et porteur d'un groupement anhydride carboxylique cyclique, de préférence porté par un cycle aromatique, ayant comme substituant un groupement comprenant une insaturation éthylénique ou acétylénique, ledit groupement anhydride carboxylique pouvant être sous forme acide, ester, amide ou imide avec a2) étant présent à un taux correspondant à un rapport molaire a2)/(-NH 2 ) inférieur à 0,36 et ledit polymère thermoplastique de la matrice étant le produit de la réaction de polymérisation par allongement de a1) par a2). L'invention couvre également le matériau composite, polymère thermoplastique, la composition réactive à base de a1) et a2) sans fibres, un procédé de fabrication d'un matériau composite et une pièce mécanique ou de structure obtenue à partir de la composition selon l'invention.
Abstract:
Process for inhibiting the corrosion of a metal surface M, wherein said metal surface M is essentially made of carbon steel, comprising treating said metal surface M with a polyethylene imine P in aqueous medium.
Abstract:
Quinolines, polyquinolines, polybenzoquinolines, molecular segments of fullerenes and graphene nanoribbons, and graphene nanoribbons and processes for producing such materials are provided. The processes utilize a form of an aza-Diels-Alder (Povarov) reaction to first form quinolines and/or polyquinolines. In some such embodiments polyquinolines thus produced are used to form graphene nanoribbon precursors, and molecular segments and graphene nanoribbons. In many such embodiments the graphene nanoribbon precursors are formed from polybenzoquinolines.
Abstract:
The present disclosure is directed to polymeric beads, methods of making the beads, and methods of using the beads as high-capacity anion exchange materials. In particular, the disclosure provides polymeric beads comprising a cross-linked polyamine and having a crush strength of about 250 g/bead or more. Preferably, the beads are substantially spherical. Also disclosed are polymeric beads comprising a cross-linked polyamine that has a substantial number of both strong base sites and weak base sites. Methods of using the polymeric beads in various industrial applications, such as groundwater remediation, radio waste management, municipal wastewater management, demineralization, toxin removal, mining, food refinery, research, agriculture, and the like, are also disclosed herein.