Accession Number : ADA188460

Title :   Ordered Polymers for Space Applications.

Descriptive Note : Final rept., 1 May 85-30 Apr 87,

Corporate Author : SRI INTERNATIONAL MENLO PARK CA

Personal Author(s) : Wolfe, James F ; Bitler, Steven P ; Chow, Andrea W

PDF Url : ADA188460

Report Date : 12 Oct 1987

Pagination or Media Count : 100

Abstract : The synthesis of polybenzazole (PBZ) polymers and model compounds was studied to determine their (1) potential for use in nonlinear optical (NLO) applications and (2) reaction kinetics and chemo-rheology of polymerization in the ordered phase. Specific compounds that should exhibit high figures of merit NLO applications have been identified. The synthesis of PBZ polymers with controlled molecular weight is described, including a description of the synthesis variables important in attaining high intrinsic viscosity and low shear viscosity nematic solutions, leading to improved processability and reproducibility. THe phenomenon of mesophase-enhanced polymerization of poly(p-phenylenebenzobisthiazole) (PBT) and the chemo-rheological properties at various shear rates were investigated.

Descriptors :   *POLYMERS, *SPACE TECHNOLOGY, *BENZENE COMPOUNDS, *AZOLES, CONTROL, FIGURE OF MERIT, MOLECULAR WEIGHT, ORDER DISORDER TRANSFORMATIONS, RATES, REACTION KINETICS, REPRODUCIBILITY, SHEAR PROPERTIES, SYNTHESIS(CHEMISTRY), VARIABLES

Subject Categories : Polymer Chemistry
      Unmanned Spacecraft
      Manned Spacecraft

Distribution Statement : APPROVED FOR PUBLIC RELEASE