Disclosed are a protective coating layer, and a preparation method and use thereof. The present application provides a protective coating layer, including: a rusty-surface liquid layer, a nano-zinc yellow epoxy primer layer, a nano-epoxy micaceous iron oxide (MIO) intermediate coating layer, and a nano-fluorocarbon top coating layer, where the rusty-surface liquid layer is applied on a metal substrate; the nano-zinc yellow epoxy primer layer is applied on a surface of the rusty-surface liquid layer; the nano-epoxy MIO intermediate coating layer is applied on a surface of the nano-zinc yellow epoxy primer layer; and the nano-fluorocarbon top coating layer is applied on a surface of the nano-epoxy MIO intermediate coating layer. The present application effectively solves the technical problem that the existing protective coating layer with nanoparticles exhibits poor adhesion to a substrate and cannot provide a protective effect for a long time.

A resin composition containing an ethylene-vinyl alcohol copolymer (A), a polyamide resin (B), acetic acid and/or its salt (C), an aliphatic carboxylic acid (D) other than acetic acid, and an aliphatic carboxylic acid metal salt (E) which is a metal salt of (D), wherein: the metal moiety of (E) is selected from elements belonging to the Long Periodic Table 4th-period d-block, the weight ratio (A)/(B) is 99/1 to 15/85, the amounts of (C), (D), and (E) on a weight basis satisfy expressions (1) and (2):

0.001≤(Amount of (E) on metal ion basis)/(Amount of (C) on acetate ion basis)≤1.5  (1)

0.11≤(Amount of (E) on metal ion basis)/(Amount of (D) on carboxylate ion basis)≤100  (2), and

the elongational viscosity of the resin composition at 210° C. at 100 S.sup.−1 satisfies expression (3):

350≤(Elongational viscosity(Pa.Math.s))≤47,000  (3).

A method for forming a graphene-reinforced polymer matrix composite is disclosed. The method includes distributing graphite microparticles into a molten thermoplastic polymer phase; and applying a succession of shear strain events to the molten polymer phase so that the molten polymer phase exfoliates the graphite successively with each event until at least 50% of the graphite is exfoliated to form a distribution in the molten polymer phase of single- and multi-layer graphene nanoparticles less than 50 nanometers thick along the c-axis direction.

A method for forming a graphene-reinforced polymer matrix composite is disclosed. The method includes distributing graphite microparticles into a molten thermoplastic polymer phase; and applying a succession of shear strain events to the molten polymer phase so that the molten polymer phase exfoliates the graphite successively with each event until at least 50% of the graphite is exfoliated to form a distribution in the molten polymer phase of single- and multi-layer graphene nanoparticles less than 50 nanometers thick along the c-axis direction.

The present invention relates to a fire, smoke and toxicity retardant (FST) polyamide thermoplastic mass usable for 3D printing which comprises at least one non-halogenated organic flame retardant in combination with at least one particulate inorganic flame retardant. Moreover, the present invention refers to uses of such FST polyamide thermoplastic mass for 3D printing. The invention further relates to methods of preparing a three-dimensionally shaped product by means of 3D printing based on such FST polyamide thermoplastic mass.

The present invention relates to a fire, smoke and toxicity retardant (FST) polyamide thermoplastic mass usable for 3D printing which comprises at least one non-halogenated organic flame retardant in combination with at least one particulate inorganic flame retardant. Moreover, the present invention refers to uses of such FST polyamide thermoplastic mass for 3D printing. The invention further relates to methods of preparing a three-dimensionally shaped product by means of 3D printing based on such FST polyamide thermoplastic mass.

Described herein is a melt flowable polyamide composition for shaped articles, which may include thin wall connectors such as electrical connectors.

Described herein is a melt flowable polyamide composition for shaped articles, which may include thin wall connectors such as electrical connectors.

A vehicle component includes a polymeric material, a first filler, and a second filler. The polymeric material can be present at a concentration of at least about 35% by weight of the vehicle component. The first filler can be a carbon-containing filler dispersed within the polymeric material. The carbon-containing filler can be present at a concentration of at least about 20% by weight of the vehicle component. The second filler includes a substrate and carbon nanotubes. The carbon nanotubes extend from a surface of the substrate.

A vehicle component includes a polymeric material, a first filler, and a second filler. The polymeric material can be present at a concentration of at least about 35% by weight of the vehicle component. The first filler can be a carbon-containing filler dispersed within the polymeric material. The carbon-containing filler can be present at a concentration of at least about 20% by weight of the vehicle component. The second filler includes a substrate and carbon nanotubes. The carbon nanotubes extend from a surface of the substrate.