Polymer composite comprising an interfacially modified fiber and particle

A pellet comprising a thermoplastic composite comprising:

• a. about 80 to 5 vol. % of a polymer phase comprising a thermoplastic polymer with a density of less than about 1.9 g-cm−3 and
• b. about 20 to 95 vol. % of a dispersed fiber phase comprising a reinforcing fiber with an aspect ratio of 1 to 50 the dispersed phase comprising about 0.2-6 wt. % of a coating of at least one interfacial modifier;
• wherein the composite material has a Young's modulus of greater than 700 MPa;
• the interfacial modifier provides a coating on the dispersed fiber that can form a close association between the fiber and polymer and covalent bonding between fiber and polymer is not formed.

A composite adapted for use in an injection molding system, the composite comprising:

• a. about 80 to 5 vol. % of a polymer phase comprising a thermoplastic polymer with a density of less than about 1.9 g-cm−3 and
• b. about 20 to 95 vol. % of a dispersed fiber phase comprising a reinforcing fiber with an aspect ratio of 1 to 50 the dispersed phase comprising about 0.2-6 wt. % of a coating of at least one interfacial modifier;
• wherein the composite material has a Young's modulus of greater than 700 MPa;
• the interfacial modifier provides a coating on the dispersed fiber that can form a close association between the fiber and polymer and covalent bonding between fiber and polymer is not formed.

A thermoplastic composite comprising:

• a. about 80 to 5 vol. % of a polymer phase comprising a polyolefin polymer with a density of less than about 1.9 g-cm−3 and
• b. about 20 to 95 vol. % of a dispersed fiber phase comprising a reinforcing glass fiber with an aspect ratio of 1 to 50 the dispersed phase comprising about 0.2-6 wt. % of a coating of at least one interfacial modifier;
• wherein the composite material has a Young's modulus of greater than 700 MPa;
• the interfacial modifier provides a coating on the dispersed fiber that can form a close association between the fiber and polymer and covalent bonding between fiber and polymer is not formed.