Enhancement of the mechanical properties by graphite flake addition

Patent · Tue Jan 01 00:00:00 EST 1991

OSTI ID:867681

Bunnell, Sr., Lee R. ^[1]

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1. (Kennewick, WA)

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.

• Research Organization: Battelle Memorial Institute, Columbus, OH (United States)
• DOE Contract Number: AC06-76RL01830
• Assignee: Battelle Memorial Institute (Richland, WA)
• Patent Number(s): US 4987175
• OSTI ID: 867681
• Country of Publication: United States
• Language: English

Related Subjects

enhancement
mechanical
properties
graphite
flake
addition
compositions
accordance
comprise
polymer
reinforcing
material
distributed
throughout
effective
amount
structurally
reinforce
individual
flakes
equal
000
angstroms
thickness
aspect
ratio
100
preferably
significantly
randomly
oriented
novel
apparatus
shear
grinding
platy
solid
comprises
cylindrical
shearing
drum
grinder
received
therein
longitudinal
axis
internal
surface
formed
predetermined
radius
curvature
supported
rotation
external
slightly
shearing drum
shear grinder
predetermined radius
novel apparatus
reinforcing material
internal surface
individual flakes
external surface
effective amount
aspect ratio
solid material
mechanical properties
longitudinal axis
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
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