The present disclosure relates to a CFRP structural body having improved flame retardancy, and a carbon fiber prepreg capable of giving a CFRP structural body having improved flame retardancy.

A CFRP structural body comprising CFRP, in which the CFRP structural body is molded from a carbon fiber prepreg comprising a carbon fiber mat formed of chopped carbon fiber bundles with a filament count of 3K or less impregnated with a resin composition, a carbon fiber content of the CFRP is 60% by mass or more, and the CFRP structural body does not have a portion with a thickness of less than 4 mm; and a prepreg comprising a carbon fiber mat impregnated with a resin composition, in which the carbon fiber mat is formed of chopped carbon fiber bundles with filament counts of 3K or less, and a carbon fiber content of the prepreg is 60% by mass or more.

The present disclosure relates to a CFRP structural body having improved flame retardancy, and a carbon fiber prepreg capable of giving a CFRP structural body having improved flame retardancy.

A CFRP structural body comprising CFRP, in which the CFRP structural body is molded from a carbon fiber prepreg comprising a carbon fiber mat formed of chopped carbon fiber bundles with a filament count of 3K or less impregnated with a resin composition, a carbon fiber content of the CFRP is 60% by mass or more, and the CFRP structural body does not have a portion with a thickness of less than 4 mm; and a prepreg comprising a carbon fiber mat impregnated with a resin composition, in which the carbon fiber mat is formed of chopped carbon fiber bundles with filament counts of 3K or less, and a carbon fiber content of the prepreg is 60% by mass or more.

The claimed material relates to a mixed silica and silicate fiber and polymer composite having enhanced modulus, viscoelastic and rheological properties.

The claimed material relates to a mixed silica and silicate fiber and polymer composite having enhanced modulus, viscoelastic and rheological properties.

A prepreg according to the invention comprises: a raw yarn treated by a sizing agent; a thermoplastic resin material; and a thermosetting resin material; wherein the thermoplastic resin material coats at least a part of an outer peripheral surface of the raw yarn, wherein the thermosetting resin material coats at least a part of an outer peripheral surface of the thermoplastic resin material, or wherein the thermosetting resin material coats at least a part of the outer peripheral surface of the raw yarn, wherein the thermoplastic resin material coats at least a part of an outer peripheral surface of the thermosetting resin material, and wherein the thermosetting resin material is polymerized by heating.

A prepreg according to the invention comprises: a raw yarn treated by a sizing agent; a thermoplastic resin material; and a thermosetting resin material; wherein the thermoplastic resin material coats at least a part of an outer peripheral surface of the raw yarn, wherein the thermosetting resin material coats at least a part of an outer peripheral surface of the thermoplastic resin material, or wherein the thermosetting resin material coats at least a part of the outer peripheral surface of the raw yarn, wherein the thermoplastic resin material coats at least a part of an outer peripheral surface of the thermosetting resin material, and wherein the thermosetting resin material is polymerized by heating.

A biodegradable composite may include a biodegradable plastic polymer having a biodegradability of from about 80 percent (%) to about 95% when measured according to a biodegradability test in accordance with an ASTM D6400-19 standard and a bio-derived fiber. A polymeric matrix of the biodegradable plastic polymer may have a tensile strength of from about 30 MPa to about 45 MPa and an elastic modulus of from about 2600 MPa to about 3600 MPa. The bio-derived fiber may have a tensile strength greater than the tensile strength of the polymeric matrix of the biodegradable plastic polymer and an elastic modulus greater than the elastic modulus of the polymeric matrix.

The present disclosure provides compositions including a carbon fiber material comprising one or more of dibromocyclopropyl or polysilazane disposed thereon; and a thermosetting polymer or a thermoplastic polymer. The present disclosure further provides metal substrates including a composition of the present disclosure disposed thereon. The present disclosure further provides vehicle components including a metal substrate of the present disclosure. The present disclosure further provides methods for manufacturing a vehicle component, including contacting a carbon fiber material with a polysilazane or a dibromocarbene to form a coated carbon fiber material; and mixing the coated carbon fiber material with a thermosetting polymer or a thermoplastic polymer to form a composition. Methods can further include depositing a composition of the present disclosure onto a metal substrate.

The present disclosure provides compositions including a carbon fiber material comprising one or more of dibromocyclopropyl or polysilazane disposed thereon; and a thermosetting polymer or a thermoplastic polymer. The present disclosure further provides metal substrates including a composition of the present disclosure disposed thereon. The present disclosure further provides vehicle components including a metal substrate of the present disclosure. The present disclosure further provides methods for manufacturing a vehicle component, including contacting a carbon fiber material with a polysilazane or a dibromocarbene to form a coated carbon fiber material; and mixing the coated carbon fiber material with a thermosetting polymer or a thermoplastic polymer to form a composition. Methods can further include depositing a composition of the present disclosure onto a metal substrate.

A multilayer radar-absorbing laminate includes three juxtaposed blocks. A first electrically conductive block is arranged toward the inside of the aircraft in use. A second electromagnetic intermediate absorber block has a layer of electrically non-conductive fiber sheets is permeated by graphene-based nanoplatelets to achieve a periodic and electromagnetically subresonant layer, the conductive layers containing graphene nanoplatelets alternating with non-conductive layers. A third block of electrically non-conductive material is arranged towards the outside and forms part of the outer surface of the aircraft. The second block is produced by depositing on the fiber sheets a suspension of graphene nanoplatelets in a polymeric mixture, with controlled penetration of the graphene nanoplatelets into the fiber sheets. A plurality of dry fiber sheets sprayed with the suspension of graphene nanoplatelets is superimposed. An unpolymerized thermosetting synthetic resin is infused into a lay-up made of the first, second and third blocks. Afterwards, the thermosetting resin is polymerized.