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.

Report Date:

1987-10-12

Pagination or Media Count:

100.0

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 polyp-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