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Title: Enhancement of the mechanical properties by graphite flake addition

Compositions in accordance with the invention comprise a polymer and flake reinforcing material distributed throughout the polymer in an effective amount to structurally reinforce the polymer. Individual flakes of the flake material (a) are less than or equal to 1,000 Angstroms in thickness, (b) have an aspect ratio greater than or equal to 100, and (c) are preferably significantly randomly oriented throughout the polymer. A novel apparatus for shear grinding a platy solid material into such individual flakes comprises a cylindrical shearing drum and a shear grinder received therein. The shearing drum has a longitudinal axis and an internal surface formed about a first predetermined radius of curvature. The cylindrical drum is supported for rotation about its longitudinal axis. The shear grinder has an external surface formed about a second predetermined radius of curvature. The second radius of curvature is slightly less than the first radius of curvature.
Authors:
 [1]
  1. (Kennewick, WA)
Publication Date:
OSTI Identifier:
867681
Report Number(s):
US 4987175
DOE Contract Number:
AC06-76RL01830
Resource Type:
Patent
Research Org:
BATTELLE MEMORIAL INSTITUTE
Country of Publication:
United States
Language:
English
Subject:
enhancement; mechanical; properties; graphite; flake; addition; compositions; accordance; comprise; polymer; flake; reinforcing; material; distributed; throughout; polymer; effective; amount; structurally; reinforce; polymer; individual; flakes; flake; material; equal; 000; angstroms; thickness; aspect; ratio; equal; 100; preferably; significantly; randomly; oriented; throughout; polymer; novel; apparatus; shear; grinding; platy; solid; material; individual; flakes; comprises; cylindrical; shearing; drum; shear; grinder; received; therein; shearing; drum; longitudinal; axis; internal; surface; formed; predetermined; radius; curvature; cylindrical; drum; supported; rotation; longitudinal; axis; shear; grinder; external; surface; formed; predetermined; radius; curvature; radius; curvature; slightly; radius; curvature; shearing drum; shearing drum; shear grinder; shear grinder; predetermined radius; predetermined radius; novel apparatus; reinforcing material; internal surface; individual flakes; individual flakes; external surface; effective amount; aspect ratio; solid material; mechanical properties; longitudinal axis; longitudinal axis; surface formed; surface formed; distributed throughout; structurally reinforce; shear grinding; significantly randomly; preferably significantly; platy solid; received therein; randomly oriented; oriented throughout; cylindrical drum; material distributed; flake reinforcing; flakes comprises; flake material; grinder received; cylindrical shearing; flake addition; surface form; surface form /524/