A method for continuously preparing graphene powder directly dispersed in an organic system, including: mixing an aqueous graphene oxide dispersion, an emulsifier and an oil-soluble monomer followed by pH adjustment and dispersing to obtain a pre-emulsified dispersion; subjecting the pre-emulsified dispersion to an emulsion polymerization reaction in the presence of an initiator; introducing a reducing agent to reduce graphene oxide; and subjecting the reaction mixture after emulsion polymerization to spray drying to obtain the graphene powder. Equipment used in the preparation method is also provided herein.

Compositions include a plurality of polymer particulates comprising a matrix polymer and one or more types of nanoparticles selected from the group consisting of biopolymer nanoparticles, biomineral nanoparticles excluding biomineralized silica alone, and any combination thereof. Illustrative examples of such nanoparticles may include cellulose nanoparticles, hydroxyapatite nanoparticles, or any combination thereof associated with the matrix polymer. The polymer particulates may be prepared by melt emulsification. Methods include depositing such polymer particulates in a powder bed; and heating a portion of the powder bed to consolidate a portion of the polymer particulates into a consolidated part having a specified shape. The matrix polymer may be biodegradable and lose at least about 40% mass in six days in a phosphate buffer solution (0.2 M, pH 7.0) containing 0.2 mg/mL of lipase obtained from Pseudomonas cepacia (≥30 U/mg) and incubated at 37° C.

Compositions include a plurality of polymer particulates comprising a matrix polymer and one or more types of nanoparticles selected from the group consisting of biopolymer nanoparticles, biomineral nanoparticles excluding biomineralized silica alone, and any combination thereof. Illustrative examples of such nanoparticles may include cellulose nanoparticles, hydroxyapatite nanoparticles, or any combination thereof associated with the matrix polymer. The polymer particulates may be prepared by melt emulsification. Methods include depositing such polymer particulates in a powder bed; and heating a portion of the powder bed to consolidate a portion of the polymer particulates into a consolidated part having a specified shape. The matrix polymer may be biodegradable and lose at least about 40% mass in six days in a phosphate buffer solution (0.2 M, pH 7.0) containing 0.2 mg/mL of lipase obtained from Pseudomonas cepacia (≥30 U/mg) and incubated at 37° C.

An impact-resistant polystyrene resin includes a continuous phase and a plurality of particles dispersed in the continuous phase. The average particle size of the particles is about 0.1 to 4.0 .Math.m, and the average distance between the particles is about 0.3 to 5.0 .Math.m. The impact-resistant polystyrene resin is made from a polystyrene composition including a polystyrene plastic, a styrene block copolymer, a processing aid, and an antioxidant.

An impact-resistant polystyrene resin includes a continuous phase and a plurality of particles dispersed in the continuous phase. The average particle size of the particles is about 0.1 to 4.0 .Math.m, and the average distance between the particles is about 0.3 to 5.0 .Math.m. The impact-resistant polystyrene resin is made from a polystyrene composition including a polystyrene plastic, a styrene block copolymer, a processing aid, and an antioxidant.

An amorphous polylactic acid polymer having a weight average molecular weight in the range of about 35,000 to 180,000 is described. The polylactic acid polymer composition can be hammer milled without cryogenics result in the form of particles wherein 90% of the particles have particle size of about 250 μm or less and the material has a glass transition temperature of between about 55° C. to about 58° C. and a relative viscosity of about 1.45 to about 1.95 centipoise. The polymer composition can be used to form an aqueous suspension. The material is ideally suited for use in preparing particleboard. A method is disclosed for preparing such polylactic acid polymers. The method involves obtaining an amorphous polylactic acid polymer having a weight average molecular weight of between about 115,000 to about 180,000. Treating the polylactic acid polymer to reduce the molecular weight to between about 35,000 to 45,000 such that it has a glass transition temperature of between about 55° C. and 58° C. and a relative viscosity of about 1.45 to about 1.95. Material can be formed into particles in a commercial hammer mill with bypass such that 90% of the initial mass results in the particles which can pass thru a sieve having a pore size of about 250 μm. During particle board formation the temperature of around 140-140 C being reached to optimally activate the adhesive; Bond strengths and throughput rates of resulting particle boards can be controlled thereafter, with variable combination of particle sizes, adhesive loading and initial moisture content.

An amorphous polylactic acid polymer having a weight average molecular weight in the range of about 35,000 to 180,000 is described. The polylactic acid polymer composition can be hammer milled without cryogenics result in the form of particles wherein 90% of the particles have particle size of about 250 μm or less and the material has a glass transition temperature of between about 55° C. to about 58° C. and a relative viscosity of about 1.45 to about 1.95 centipoise. The polymer composition can be used to form an aqueous suspension. The material is ideally suited for use in preparing particleboard. A method is disclosed for preparing such polylactic acid polymers. The method involves obtaining an amorphous polylactic acid polymer having a weight average molecular weight of between about 115,000 to about 180,000. Treating the polylactic acid polymer to reduce the molecular weight to between about 35,000 to 45,000 such that it has a glass transition temperature of between about 55° C. and 58° C. and a relative viscosity of about 1.45 to about 1.95. Material can be formed into particles in a commercial hammer mill with bypass such that 90% of the initial mass results in the particles which can pass thru a sieve having a pore size of about 250 μm. During particle board formation the temperature of around 140-140 C being reached to optimally activate the adhesive; Bond strengths and throughput rates of resulting particle boards can be controlled thereafter, with variable combination of particle sizes, adhesive loading and initial moisture content.

The present invention relates to a polymer composition comprising a (meth)acrylic polymer and a multistage polymer. In particular the present invention it relates to polymer composition comprising a (meth)acrylic polymer and a multistage polymer that can be used as a masterbatch. More particularly the present invention relates also to a process for preparing a polymer composition comprising a (meth)acrylic polymer and a multistage polymer by spray drying or coagulation.

The present invention relates to a polymer composition comprising a (meth)acrylic polymer and a multistage polymer. In particular the present invention it relates to polymer composition comprising a (meth)acrylic polymer and a multistage polymer that can be used as a masterbatch. More particularly the present invention relates also to a process for preparing a polymer composition comprising a (meth)acrylic polymer and a multistage polymer by spray drying or coagulation.

Rheology modifiers comprising cross-linked poly(amino acid) and methods of their use in aqueous compositions. The modifiers comprise cross-linked poly(amino acid) microparticles having a mean equivalent diameter when fully swollen in deionized water of up to 1000 μm, as measured by laser diffraction. In particular, the poly(amino acid) is D-, L- or D,L-Y-poly(glutamic acid). A method of preparing the modifier comprises cross-linking a poly(amino acid), drying the cross-linked poly(amino acid) and grinding the cross-linked poly(amino acid) to have the required diameter.