A method for extruding a recycled polymer from an impure extrudable material comprises injecting a non-solvent in a liquid state into an apparatus and mixing substantially homogeneously the non-solvent with the impure extrudable material, thereby forming a dispersion of the non-solvent with the impure extrudable material. The impurities are output in a gaseous state from the apparatus.

A method for extruding a recycled polymer from an impure extrudable material comprises injecting a non-solvent in a liquid state into an apparatus and mixing substantially homogeneously the non-solvent with the impure extrudable material, thereby forming a dispersion of the non-solvent with the impure extrudable material. The impurities are output in a gaseous state from the apparatus.

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.

Provided is a method for producing a resin composition from which can be formed a molded body having excellent tensile elongation and/or rigidity, and more preferably a molded body which stably achieves both high tensile elongation and high rigidity. An aspect of the present invention provides a method for producing a resin composition which contains a first component and a second component, said method comprising a kneading step for kneading the first component and the second component via an extruder provided with a kneading zone that includes a plurality of narrow gap zones in which the gap between a cylinder inner wall and a screw is not more than 2 mm. An aspect of the present invention provides a method for producing a resin composition which contains a first component and a second component, said method comprising a kneading step for kneading the first component and the second component via an extruder provided with a kneading zone that includes a plurality of high-pressure zones in which the pressure is not less than 0.1 MPa, wherein out of the plurality of high-pressure zones, a maximum pressure zone in which the pressure is the highest has a pressure [P1] of not less than 0.5 MPa, and the ratio [P1/P2] of the pressure [P1] to the average value [P2] of pressures in high-pressure zones other than the maximum pressure zone is greater than 1 but not greater than 100.

An extruder-mixer has a stator and a rotor which is arranged coaxially with respect to the stator. The rotor is rotatably supported with respect to the stator. The stator is at least partially arranged inside a volume defined by the rotor. The rotor has a rotor cage having a large number of apertures. The apertures are configured to be elongate in a longitudinal direction and the longitudinal direction thereof extends in each case in a skewed manner with respect to a rotation axis of the rotor.

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.