Process for densification of a poly(arylene ether ketone) (PAEK) powder or of a mixture of poly(arylene ether ketone) (PAEK) powders, the process being mixing the powder or the mixture of powders, in a mixer equipped with a rotary stirrer including at least one blade, for a period of between 30 minutes and 120 minutes, preferably of between 30 and 60 minutes, at a blade-tip speed of between 30 m/s and 70 m/s, preferably of between 40 and 50 m/s.

The present specification relates to a polymer with improved acid resistance, a polymer electrolyte membrane including the same, a membrane-electrode assembly including the polymer electrolyte membrane, a fuel cell including the membrane-electrode assembly, and a redox flow battery including the polymer electrolyte membrane.

Provided is a poly(arylene ether ketone) resin which inhibits reactions such as molecular weight extension and crosslinking in a high-temperature molten state and which is excellent in melt viscosity stability and molding processability. The poly(arylene ether ketone) resin contains an alkylsulfonyl group represented by general formula (1). In the formula, R is an alkyl group containing one to four carbon atoms.

This disclosure is directed to methods for preparing thermoplastic surfaces suitable for the application of paint, adhesives, or surfacing films and the structures derived or derivable from these methods. The disclosure is also directed to composite structures comprising a thermoplastic substrate comprising a chemical sealant direct bonded to a surface thereof, the chemical sealant providing a surface suitable for adhering adhesives, paints, and/or surfacing films to the thermoplastic surfaces.

The present invention provides a flexible pipe having excellent blister resistance in a high-temperature and high-pressure environment even though including a thick resin pipe. The flexible pipe includes a resin pipe having a thickness of greater than 5 mm. The resin pipe is formed from a resin having a CO.sub.2 permeability coefficient P(CO.sub.2) of 20×10.sup.−9 cm.sup.3.Math.cm/cm.sup.2.Math.s.Math.cmHg or lower at 150° C., a CH.sub.4 permeability coefficient P(CH.sub.4) of 10×10.sup.−9 cm.sup.3.Math.cm/cm.sup.2.Math.s.Math.cmHg or lower at 150° C., a ratio D(CO.sub.2)/S(CO.sub.2) between a CO.sub.2 diffusion coefficient D(CO.sub.2) and a CO.sub.2 solubility coefficient S(CO.sub.2) of 3×10.sup.−5 Pa.Math.m.sup.2/s or higher at 150° C., and a ratio D(CH.sub.4)/S(CH.sub.4) between a CH.sub.4 diffusion coefficient D(CH.sub.4) and a CH.sub.4 solubility coefficient S(CH.sub.4) of higher than 15×10.sup.−5 Pa.Math.m.sup.2/s at 150° C.

The present disclosure is directed to improved poly(arylene ether ketone) powders for use in laser sintering, powder coating, compression molding, or transfer molding.

The present invention aims to provide a resin composition capable of providing a molded article that has high slidability and high impact resistance, as well as excellent tensile strength. The present invention relates to a resin composition containing an aromatic polyether ketone resin (I) and a fluororesin (II). The composition preferably has a sodium content of 120 ppm or less relative to the composition or a calcium content of 15 ppm or less relative to the composition.

The invention pertains to composition of fluoroplastic and poly(aryletherketone), to method of making the same, and to shaped products therefrom, including notably wire sheaths, which combine advantageous performances of both ingredients, which can be easily manufactured through conventional equipment's, and which notably deliver room temperature toughness, in combination with notably chemical resistance and dielectric properties of fluoroplastics and with mechanical performances of poly(aryl ether ketone)s.

Polymeric materials for use in challenging situations in the oil and gas industry (e.g. challenging physical and chemical environments) are described. The polymeric materials comprise a polymeric material having a repeat unit of formula I and a repeat unit of formula II wherein Ph represents a phenylene moiety; wherein the repeat units I and II are in the relative molar proportions 95:5 to 80:20.

A composition [composition (C)] comprising from 1 to 90% by weight (wt. %) of at least one poly(aryl ether ketone) [(PAEK) polymer, herein after], from to 25 wt. % of at least one polyphenylsulfone polymer [(PPSU) polymer, herein after], from 1 to 90% wt. % of at least one poly(aryl ether sulfone) polymer [(P1) polymer, herein after], selected from a group consisting of at least one high temperature poly(aryl ether sulfone) polymer [(PAES.sub.HT) polymer, herein after] and at least one polyethersulfone polymer [(PESU) polymer, herein after]; from 0 to 50% wt. % of at least one reinforcing filler, and wherein all % are based on the total weight of the composition (C).