Abstract:
An assembly comprises first and second parts which bear against one another, wherein said first part comprises a polyetherketoneketone and said second part comprises a polyetherketoneketone. The parts bear against one another such that one or both of the parts may have a tendency to wear and/or produce wear debris by virtue of contact between the parts. The materials used, however, minimise wear and the production of such wear debris.
Abstract:
A thermoplastic composition comprising a compatibilized blend of poly(arylene ether) and polyamide; a reinforcing fiber; and an electrically conductive filler. Greater than 50 weight percent of the polyamide, based on the total weight of the polyamide, is polyamide-6. The thermoplastic composition is useful in articles that are painted by electrostatic painting.
Abstract:
A polymeric material includes phenyl moieties, ketone moieties and ether moieties in the polymeric backbone of said polymeric material, wherein the difference betwee the nucleation temperature (Tn) and the glass transitio temperature (Tg) of said polymeric material is greate than 23°C.
Abstract:
Polymer composition (C) comprising a poly(aryl ether ketone) (P1) chosen from polyetheretherketones, polyetherketoneketones and polyetheretherketone-polyetherketoneketone copolymers, a polyphenylsulfone (P2), and a reinforcing fiber (F), with the exception of a polymer composition consisting of 90 wt %, based on the total weight of the polymer composition, of a polymer blend consisting of 85 parts by weight of a polyphenylsulfone and 15 parts by weight of a polyetheretherketone, and 10 wt %, based on the total weight of the polymer composition, of glass fiber.
Abstract:
Use of an effective amount (ε) of a poly(biphenyl ether sulfone) (P2) for diluting a poly(aryl ether ketone) (P1) contained in a polymer composition (C1) consisting of the poly(aryl ether ketone) (P1) and, optionally in addition, one or more ingredients (A) other than the poly(aryl ether ketone) (P1) and the poly(biphenyl ether sulfone) (P2), while at least substantially maintaining the chemical resistance of the polymer composition (C1) in a chemical environment (E) which is more aggressive against the poly(biphenyl ether sulfone) (P2) than against the poly(aryl ether ketone) (P1).
Abstract:
Phase separated blends of polyaryl ether ketones, polyaryl ketones, polyether ketones, polyether ether ketones and mixtures thereof with at least one polysulfone etherimide, wherein the polysulfone etherimide has greater than or equal to 50 mole% of the polymer linkages contain at least one aryl sulfone group are described. Such blends have improved load bearing capability at high temperature. In another aspect a high crystallization temperature, especially at fast cooling rates, is achieved.
Abstract:
A method of making a composite material comprises selecting a polymeric material which may be a polyaryletherketone, having a melt viscosity in the range 0.05 to 0.12 kNsm -2 and contacting said polymeric material with a filler means, wherein said filler means is preferably a discontinuous filler means.
Abstract:
Ein Mahlverfahren zur Herstellung von feinkörnigem Polyarylenetherketon ist dadurch gekennzeichnet, dass ein poröses Polyarylenetherketon mit einer BET-Oberfläche von mehr als 1 m 2 /g vermählen wird.
Abstract:
A membrane electrode assembly has two gas diffusion layers, two catalyst layers and an ion-exchange membrane interposed therebetween wherein the ion-exchange membrane is cast from a sulphonated polyether ketone/sulfone ionomer. Specifically, the ionomer can be represented as A-B-C wherein A is B is and C is Further x, y, z represent the mole ratios of each moiety in the ionomer such that x is between 0.25 and 0.40; y is between 0.01 and 0.26; and z is between 0.40 and 0.67. Melt viscosity of the corresponding base polymer also affects performance in the fuel cell, particularly at values over 0.4 kNsm -2 as measured at 400 °C, 1000 s -1 . In preparing the membrane electrode assembly, the catalyst layers may be coated directly on the membrane and then bonded with two gas diffusion layers.