A method for functionalizing the surface of a substrate, performed in a supercritical fluid medium, may include: (i) providing a substrate having labile hydrogen functions on the surface; (ii) bringing the substrate into contact, in a supercritical fluid, with at least one organic molecule carrying at least one blocked isocyanate function which can be activated by heating; and (iii) subjecting the whole to a temperature sufficient to bring about the release of the blocked isocyanate function carried by the molecule, and the covalent grafting of the molecule by reaction of the isocyanate function with a labile hydrogen function on the surface of the substrate.

Provided is a composite material including carbon fibers having a weight average fiber length of 1 mm or more and 100 mm or less and a thermoplastic resin. The composite material satisfies K1≤1.5×K2 and exhibits excellent conformability during a stretching step in press molding; and a press molded body production method using said composite material. K1 represents the inclination of an approximate straight line of linear approximation on the plot in the range of 35% strain or more, obtained by strain sweep tests from 0% to 100% on the composite material at a temperature of 270° C., a shear of 100 rad/sec, and a normal load of 2 N, plotting, both in logarithmic scales, the values of strain % versus the values of complex viscosity coefficient Pa.Math.sec. K2 represents the inclination of an approximate straight line of linear approximation on the plot in the range of less than 35% strain.

A basalt-fiber-reinforced thermoplastic composite material may include a thermoplastic resin and a basalt fiber as a reinforcement, wherein the basalt fiber is surface-treated with an alkoxy-group-substituted silane compound.

A semi-aromatic polyamide film having a thermal shrinkage factor in the longitudinal direction of the film, S.sub.MD, of −1.0 to 1.5% and a thermal shrinkage factor in the width direction of the film, S.sub.TD, of −1.0 to 1.5% as measured under the conditions of 250° C. and 5 min, a tensile breaking elongation of 70% or more in the longitudinal direction and the width direction, and a haze of 14% or less.

Provided is a polyamide resin composition which is used for a foam molded body and has high appearance performance, high load resistance, and high impact resistance. This polyamide resin composition for foam molding contains: 40 to 70 parts by mass of a crystalline polyamide resin (A); 5 to 15 parts by mass of a non-crystalline polyamide resin (B); 15 to 50 parts by mass of an inorganic reinforcing material (C); 0.1 to 10 parts by mass of an elastomer (D); and 0.5 to 15 parts by mass of a copolymer (E) having a functional group that reacts with a terminal group of the polyamide resin. The total amount of the crystalline polyamide resin (A), the non-crystalline polyamide resin (B), the inorganic reinforcing material (C), the elastomer (D), and the copolymer (E) having a functional group that reacts with a terminal group of the polyamide resin is 100 parts by mass.

The present invention relates to a thermoplastic resin composition and a molded product using same, the thermoplastic resin composition comprising, based on 100 parts by weight of a base resin including (A) 50 to 80 wt % of a polyamide resin and (B) 20 to 50 wt % of a fiber reinforcement, and (C) 2 to 20 parts by weight of a block copolymer including a polyether segment and a polyamide segment.

The present disclosure provides a polymeric composition including a thermoplastic polymer and an ionic liquid compound, wherein the ionic liquid compound improves the melt flow rate of the polymeric composition. The present disclosure also provides a method of preparing a polymeric composition with improved melt flow rate by mixing an ionic liquid compound with a thermoplastic polymer to obtain the polymeric composition. In some aspects, the polymeric composition includes a recycled polymer.

An asphalt modifier includes bitumen, polyolefin particles, and one or more alkyl terephthalamides. Preparing an asphalt modifier includes combining one or more alkyl terephthalamides, polyolefin particles, and bitumen, and dispersing the polyolefin particles in the bitumen to yield the asphalt modifier. Digesting polyethylene terephthalate includes combining polyethylene terephthalate with an alkylamine or carboxyalkylamine to yield a reaction mixture, and heating the reaction mixture to a temperature between about 20° C. and about 300° C. to yield an alkyl terephthalamide.

The embodiments relate to a polyamide-based film that is excellent in optical properties and mechanical properties, to a process for preparing the same, and to a cover window and a display device comprising the same. There are provided a polyamide-based film, which comprises a polyamide-based polymer and has a plasticity characteristic value represented by the following equation of 18.45 to 19.97%, a process for preparing the same, and a cover window and a display device comprising the same: Plasticity characteristic value (%)=(100−nIT)/(HIT/HM). In this equation, nIT, HIT, and HM are measured according to the ISO 14577 standard with a nanoindenter, nIT is the elasticity (%), HIT is the indentation hardness (N/mm.sup.2), and HM is the composite hardness (N/mm.sup.2).

Processes for preparing a polyamide, a polyamide material obtained by such processes, a nylon salt to be used therein, and processes for making the nylon salt are disclosed. The processes for preparing the polyamide include a direct solid state polymerization process. The salt used herein is a granulate material, prepared by a process, comprising spraying an aqueous solution comprising a diamine and a dicarboxylic acid dissolved in an aqueous medium, or an aqueous slurry comprising a diammonium dicarboxylate salt dispersed in an aqueous medium directly obtained from such an aqueous solution, onto or in a fluidized bed of diammonium dicarboxylate salt particles, while evaporating the aqueous medium, thereby forming a granulate salt material.