Accession Number : AD0918253

Title :   High Strength, Thermally Stable Polymeric Fibers

Descriptive Note : Technical rept. 1 Jul 1972-1 Sep 1973

Corporate Author : WHITTAKER CORP SAN DIEGO CA RESEARCH AND DEVELOPMENT DIV

Personal Author(s) : Delano, Chadwick B ; Doyle, R Randolph ; Milligan, Robert J

PDF Url : AD0918253

Report Date : Feb 1974

Pagination or Media Count : 50

Abstract : This work is concerned with the synthesis of specifically ordered heterocyclic polymer systems for evaluation as high tenacity fiber candidates. Specifically sought are good mechanical properties, high energy absorption (work-to-break) and high temperature performance. The primary structural criteria for polymer order are: CHAIN GROWTH WICH DESCRIBES A STRAIGHT LINE; THE ABSENCE OF BULKY PENDANT GROUPS; AND CAPABILITY FOR APPROACHING A PLANAR STRUCTURE AND INTERCHAIN BONDING. These structural features, which are primarily responsible for providing enhanced thermal and mechanical capability relative to non- oriented counterparts, at the same time render the polymer system highly intractable. The exception to these criteria appears to be the formation of the sought rod geometry through appropriate solvation of macromolecules containing flexible links to obtain for instance a helix. Poly- 2,5(6)benzimidazole (AF-R- 56) is considered in some detail.

Descriptors :   *BENZIMIDAZOLES, *POLYMERS, *SYNTHETIC FIBERS, *YARNS, ANISOTROPY, CHEMICAL PROPERTIES, CHLORINATION, DECELERATION, ENERGY ABSORBERS, FIRE RESISTANT TEXTILES, HEAT RESISTANT PLASTICS, HEAT TREATMENT, MANUFACTURING, MECHANICAL PROPERTIES, MOLECULAR PROPERTIES, MOLECULAR STRUCTURE, MOLECULAR WEIGHT, NITROGEN HETEROCYCLIC COMPOUNDS, OPTICAL PROPERTIES, POLYCYCLIC COMPOUNDS, POLYIMIDE RESINS, POLYMERIZATION, RODS, SOLUTIONS(MIXTURES), SPINNING(INDUSTRIAL PROCESSES), SYNTHESIS(CHEMISTRY), THERMAL PROPERTIES, THERMAL STABILITY, VISCOSITY

Subject Categories : Polymer Chemistry
      Textiles

Distribution Statement : APPROVED FOR PUBLIC RELEASE