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Title: Ultra-low density microcellular polymer foam and method

Abstract

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.

Inventors:
 [1];  [2]
  1. Farragut, TN
  2. Harriman, TN
Issue Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
870346
Patent Number(s):
5500450
Assignee:
United States of America as represented by Department of Energy (Washington, DC)
Patent Classifications (CPCs):
C - CHEMISTRY C08 - ORGANIC MACROMOLECULAR COMPOUNDS C08J - WORKING-UP
DOE Contract Number:  
AC05-84OR21400
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
ultra-low; density; microcellular; polymer; foam; method; open-celled; dissolved; heated; solution; consisting; essentially; solvent; dissolution; phase; inversion; liquid; sufficient; cooling; contained; containment; means; provided; nucleating; promoting; relatively; surface; formed; fixed; sites; cooled; period; time; form; porous; 12; mg; cm; porosity; interconnected; strut; morphology; porous foam; density microcellular; polymer foam; time sufficient; consisting essentially; surface formed; solution consisting; phase inversion; strut morphology; means provided; interconnected strut; ultra-low density; surface form; /521/

Citation Formats

Simandl, Ronald F, and Brown, John D. Ultra-low density microcellular polymer foam and method. United States: N. p., 1996. Web.
Simandl, Ronald F, & Brown, John D. Ultra-low density microcellular polymer foam and method. United States.
Simandl, Ronald F, and Brown, John D. Mon . "Ultra-low density microcellular polymer foam and method". United States. https://www.osti.gov/servlets/purl/870346.
@article{osti_870346,
title = {Ultra-low density microcellular polymer foam and method},
author = {Simandl, Ronald F and Brown, John D},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1996},
month = {1}
}

Works referenced in this record:

Z ‐pinch implosions onto extremely low‐density foam cylinders
journal, August 1985


Low-Density Microcellular Materials: Introduction
journal, December 1990