The present invention relates to a process for treating the surface of a polymer article with a UV-stabilizer solution which comprises an effective amount of a UV-absorber compound dissolved in a solvent, and optionally a radical scavenger. The present invention also relates to a process for preparing a UV-stabilized polymer article which comprises a step consisting in contacting the surface layer of a polymer article with the UV stabilizer solution. The present invention also provides UV-stabilized polymer articles, that-is-to-say polymer articles which are resistant to color change upon exposure to UV light.

Described herein are foam materials comprising a blend of a poly(biphenyl ether sulfone) (PPSU) and a polyethersulfone polymer (PES) with improved compressive strength and impact performance, a method for their formation, and articles comprising said foam materials for use in various lightweight applications such as transport and building materials.

Disclosed are a polymer ion exchange membrane having a self-hydration capability at a high temperature under low humidity, a method of preparing the polymer ion exchange membrane, and a polymer electrolyte fuel cell system including the polymer ion exchange membrane. The polymer electrolyte membrane includes a hydrocarbon-based proton conductive polymercoating layer, and has a nano-crack on the hydrophobic surface and thus may secure ion conductivity and self-hydration capability under low humidity and remarkably improve electrochemical performance of an electrolyte.

An object is to provide a porous film which has excellent removal performance of viruses and the like and a long lifetime, a virus removal method which uses the porous film as a filter, a method for producing a virus-free product which uses the porous film as a filter and a device which includes the porous film as a filter. In a porous film including a structure of spherical pores communicating with each other, an interconnected pore is an opening of the spherical pores communicating with each other, and the pore diameter of the interconnected pore is set to 10 nm or more and 35 nm or less, and the number of spherical pores which are present between one surface of the porous film and the other surface thereof and are 50 nm or more and 200 nm or less is set to 200 or more and 1000 or less.

A resin matrix composition is provided in the present invention. The resin matrix composition includes an epoxy resin, a polysulfone engineering plastic, a modified polyetherimide and an amine curing agent. The modified polyetherimide is formed from a nucleophilic compound and polyetherimide. The nucleophilic compound has a nucleophile such as hydroxyl group, sulfhydryl group, carboxyl group and/or amine group. Therefore, a resin matrix with two phase separation of island phase and co-continuous phase is formed. The resin matrix can have both great flexural strength and toughness. Moreover, the resin matrix has suitable viscosity, such that it is appropriate for impregnating carbon fiber to produce prepreg and carbon fiber composites.

The present invention relates to a masterbatch to for use in a process of preparing a composite material, the masterbatch comprising a blend of a first amorphous polymer with carbon nanotubes, and at least 5% by weight of carbon nanotubes based on the total weight of the masterbatch, preferably from 5% to 15%, wherein the masterbatch exhibit a high load melt flow index HLMI1 of less than 40 g/10 min determined at 200 C. under a load of 21.6 kg according to ISO1133 and the first amorphous polymer has a melt flow index MFI1 of at least 10 g/10 min determined at 200 C. under a load of 5 kg according to ISO1133H. The invention also relates to the process for preparing such masterbatch and to process of preparing a composite material using said masterbatch.

Polyester-based resin particles including a polyester-based resin as a base resin, in which the base resin exhibits a plurality of endothermic peaks corresponding to crystal melting temperatures by DSC measurement, at least one of the endothermic peaks exists in each region of a low temperature side region and a high temperature side region, a maximum endothermic peak of the low temperature side region and a maximum endothermic peak of the high temperature side region exhibit a crystal melting heat amount ratio (low temperature side crystal melting heat amount/high temperature side crystal melting heat amount) in a range of 0.1 to 1.5, and the polyester-based resin particles have a volume average particle diameter of 1 to 50 m.

A method of forming a modified thermoplastic structure for a down-hole application comprises forming a thermoplastic structure comprising at least one thermoplastic material formulated for crosslinking using an electron beam process. The thermoplastic structure is exposed to at least one electron beam to crosslink polymer chains of the thermoplastic structure. Other methods of forming a modified thermoplastic structure, and a down-hole tool are also described.

A process for the manufacture of thermoplastic polymer particles in a yield of greater than 70% is described. The process includes dissolving a thermoplastic polymer in an organic solvent capable of dissolving the polymer to form a solution, emulsifying the solution by combining the solution with water and a surfactant to form an emulsion, removing the organic solvent to form a slurry, and recovering thermoplastic polymer particles having a diameter of less than 150 micrometers and in a yield of greater than 70%. The water is present in the emulsion in an amount of 5 to less than 50 weight percent. The thermoplastic polymer particles exhibit a combination of size characteristics. Thermoplastic polymer particles and articles prepared therefrom are also described.

A resin microparticle production method includes a step of pulverizing resin particles having a thermoplastic resin as a forming material and having a BET specific surface area of equal to or more than 5 m.sup.2/g using an impact type pulverizer