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Ultra-low density microcellular polymer foam and method

Patent ·
OSTI ID:870346
 [1];  [2]
  1. Farragut, TN
  2. Harriman, TN
+ Show Author Affiliations
An ultra-low density, microcellular open-celled polymer foam and a method for making such foam. A polymer is dissolved in a heated solution consisting essentially of at least one solvent for the dissolution of the polymer in the heated solution and the phase inversion of the dissolved polymer to a liquid gel upon sufficient cooling of the heated solution. The heated solution is contained in a containment means provided with a nucleating promoting means having a relatively rough surface formed of fixed nucleating sites. The heated solution is cooled for a period of time sufficient to form a liquid gel of the polymer by phase inversion. From the gel, a porous foam having a density of less than about 12.0 mg/cm.sup.3 and open porosity provided by well interconnected strut morphology is formed.
Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN
Sponsoring Organization:
USDOE
DOE Contract Number:
AC05-84OR21400
Assignee:
United States of America as represented by Department of Energy (Washington, DC)
Patent Number(s):
US 5500450
OSTI ID:
870346
Country of Publication:
United States
Language:
English

References (2)

Low-Density Microcellular Materials: Introduction journal December 1990
Z ‐pinch implosions onto extremely low‐density foam cylinders journal August 1985

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Related Subjects

/521/
12
cm
consisting
consisting essentially
contained
containment
cooled
cooling
density
density microcellular
dissolution
dissolved
essentially
fixed
foam
form
formed
heated
interconnected
interconnected strut
inversion
liquid
means
means provided
method
mg
microcellular
morphology
nucleating
open-celled
period
phase
phase inversion
polymer
polymer foam
porosity
porous
porous foam
promoting
provided
relatively
sites
solution
solution consisting
solvent
strut
strut morphology
sufficient
surface
surface form
surface formed
time
time sufficient
ultra-low
ultra-low density