Accession Number:

AD0733697

Title:

Polymeric Systems Which Expand on Polymerization for Use in High Strength Composites.

Descriptive Note:

Annual progress rept. 1 Feb 70-31 Jan 71,

Corporate Author:

MARYLAND UNIV COLLEGE PARK DEPT OF CHEMISTRY

Personal Author(s):

Report Date:

1971-08-01

Pagination or Media Count:

52.0

Abstract:

Among the monomers that give some expansion on polymerization is the spiro ortho ester, 1,4,6-trioxaspiro4,4-nonane. When polymerization of this monomer was carried out in a dilatometer at 25 deg., the meniscus rose during the polymerization to give a final expansion at 95 conversion of 0.14. The polymer, which had the expected analysis and spectra, has a molecular weight of about 25,000. Thus, the principle that bicyclic monomers can be prepared that will polymerize with expansion has been clearly demonstrated. Author

Subject Categories:

  • Laminates and Composite Materials
  • Plastics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE