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Title: Ultra-low density microcellular polymer foam and method

An ultra-low density, microcellular open-celled polymer foam and a method for making such foam are disclosed. 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.
Inventors:
;
Issue Date:
OSTI Identifier:
203874
Assignee:
Dept. of Energy, Washington, DC (United States) PTO; SCA: 360601; PA: EDB-96:060031; SN: 96001559456
Patent Number(s):
US 5,500,450/A/
Application Number:
PAN: 8-417,366
Contract Number:
AC05-84OR21400
Resource Relation:
Other Information: PBD: 19 Mar 1996
Research Org:
Lockheed Martin Energy Syst Inc
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; FOAMS; SYNTHESIS; POLYMERS; SOL-GEL PROCESS; PORE STRUCTURE; PHASE TRANSFORMATIONS; NUCLEATION

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