The invention relates to a noncrosslinked block copolymer foam, comprising at least one rigid block and at least one flexible block, in which the copolymer includes at least one carboxylic acid chain end blocked with a polycarbodiimide. The invention also relates to a process for manufacturing this foam and to articles manufactured therefrom.

A process for the preparation of graphene, graphene materials, graphene oxide or reduced graphene oxide and the preparation of graphene, graphene materials, graphene oxide or reduced graphene oxide integrated in a thermoplastic and/or elastomeric polymer or polymer mixture by the effect of friction is produced by kneading, e.g., in an internal mixer with closed chamber or open chamber system, that performs the exfoliation of graphite, graphite oxide or reduced graphite oxide.

The present disclosure is drawn to a composite particulate build material, including 92 wt % to 99.5 wt % polymeric particles having an average size from 10 μm to 150 μm and an average aspect ratio of less than 2:1, The composite particulate build material further includes from 0.5 wt % to 8 wt % reinforcing particles having an average size of 0.1 μm to 20 μm and an average aspect ratio of 3:1 to 100:1 applied to a surface of the polymeric particles.

The present invention relates to a prepreg which contains an oriented liquid crystal polymer and a base that uses a continuous carbon fiber bundle as a forming material. The liquid crystal polymer is a thermotropic liquid crystal polymer and the base is included in an amount of at least 25 parts by mass but not more than 550 parts by mass per 100 parts by mass of the liquid crystal polymer.

A poly(imide-ester-amide) copolymer and an optical film are provided. The poly(imide-ester-amide) copolymer includes imide bonds, ester bonds, and amide bonds. A molar ratio of the imide bonds, the ester bonds, and the amide bonds is 40 to 80:10 to 30:5 to 30.

Low primary amine (LPA) polyaspartic esters are provided which comprise a reaction product of an aliphatic diamine and an excess of a Michael addition receptor optionally, in the presence of a C.sub.1-C.sub.10 alcohol, wherein the low primary amine (LPA) polyaspartic ester has a monoaspartate content of less than 10%. The low primary amine (LPA) polyaspartic esters of the invention may find use in slow reactivity polyurea systems and react with polyisocyanates to produce polyurea coatings, adhesives, sealants, films, composites, castings, and paints.

Provided is composite carbon fibers in which polymers having an amino containing group are covalently bonded to the surface of the carbon fiber. Aspects are also directed to processes for preparing the composite carbon fibers. Additional aspects are directed to reinforced composites comprising a resin matrix and the composite carbon fibers, and to processes of making such reinforced composites.

Provided are resin foam particles that enable shaping of a sound absorbing member having excellent sound absorption performance through a resin foam shaped product. Also provided is a laminate that includes a resin foam shaped product as a base material and with which high sound absorption performance can be obtained even when the laminate is a thin material. The resin foam particles contain a resin and have a recessed external part. A ratio .sub.0/.sub.1 of density of the resin .sub.0 and true density .sub.1 of the resin foam particles is 2 to 20, and a ratio .sub.1/.sub.2 of true density .sub.1 of the resin foam particles and bulk density .sub.2 of the resin foam particles is 1.5 to 4.0.

ABSTRACT OF THE DISCLOSURE An aromatic polyester containing a repeating unit (A) having Formula (a) below; a repeating unit (B) derived from an aromatic dicarboxylic acid, such as terephalic acid; a repeating unit (C) derived from an aromatic amine optionally having a hydroxyl group; and a repeating unit (D) derived from an aromatic diol. The content of (A) is 10 mol % to <20 mol %, the content of (B) is 40 mol % to <45 mol %, the total content of (C) and (D) is 40 mol % to <45 mol %, and the content of (D) is >0 mol % and <15 mol % with respect to a total of (A) to (D). In the Formula (a), Ar.sup.1 is a 1,4-phenylene group, a 2,6-naphthylene group, or a 4,4-biphenylene group; and at least one hydrogen atom in AO may be each substituted with a halogen atom, an alkyl group, or an aryl group.
OAr.sup.1CO(a)

A process for preparing a porous membrane containing a thermoplastic polymer, the process containing: (i) forming a film shaped compound containing the thermoplastic polymer and a water soluble polymer; and (ii) extracting the film shaped compound with a solvent mixture, thereby obtaining the porous membrane; wherein the thermoplastic polymer has pores with an average pore diameter <2000 nm, determined using Hg porosimetry according to DIN 66133, the thermoplastic polymer contains a polyurethane, wherein the polyurethane contains: 11 to 79% by weight of a mixture of a diol and a diisocyanate; and 21 to 89% by weight of the compound with two functional groups which are reactive towards isocyanate groups.