Accession Number : AD0283263

Title :   SYNTHESIS AND EVALUATION OF HIGH-ENERGY ORIENTED POLYMERS

Corporate Author : DENVER RESEARCH INST COLO

Personal Author(s) : GRAY,DON N. ; SMITH,CLAIBOURNE D.

Report Date : AUG 1962

Pagination or Media Count : 1

Abstract : IN CONNECTION WITH A STUDY OF POLYMERS CONTAINING HIGH-ENERGY GROUPS, POLY( -nitro-2-methylpropyl methacrylate) was prepared in both the isotactic (m.p. above 300 C.) and the atactic (m.p. 280 C.) forms. Isotactic poly(2-nitro-2methylpropyl methacrylate) was prepared by adding the monomer to a relatively large amount of toluene containing phenylmagnesium bromide as a catalyst. Atactic poly(2-ni ro-2-met ylpropyl m h cryl ) AS PREP RED BY A CONVENTIO AL FREE RADICAL-TYP POLYMERIZATION USING AZOBISISOBUTYRONITRILE. Similarly, isotactic poly(methyl methacrylate) (m.p. 140-160 C.) was prepared and compared with a commercially available sample of atactic poly(methyl methacrylate) (m.p. 120125 C.). Contrary to previous observations that the isotactic form of a polymer had higher mechanical strength than the atactic form, a actic poly(methyl methacrylate) had a higher tensile strength than the isotactic modification. (Author)

Descriptors :   *ACRYLIC RESINS, *BINDERS, *HEAT RESISTANT PLASTICS, *POLYMERS, *SOLID ROCKET PROPELLANTS, MECHANICAL PROPERTIES, MOLECULAR STRUCTURE, PHYSICAL PROPERTIES, STEREOCHEMISTRY, SYNTHESIS, TENSILE PROPERTIES

Distribution Statement : APPROVED FOR PUBLIC RELEASE