Apparatus and Techniques Used for Casting Films from Aromatic Heterocyclic Polymers.
Technical rept. Jan 71-Jun 74,
AIR FORCE MATERIALS LAB WRIGHT-PATTERSON AFB OHIO
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Techniques have been developed to convert raw polymers into films by casting from solutions and evaporating to dryness. One instrument has been developed to form films from highly volatile solvents and another to form films from corrosive nonvolatile solvents. The latter has the capability to control temperature, environment, and other factors significant in the process of casting. Formed films underwent post-treatment, such as leaching, drying, and thermal treatment. Inducing orientation by stretching has been attempted. Film structure has been investigated with x-ray diffraction. Preliminary work included films cast from BBB, PBI, and AB-PBI polymers. Casting high strength PRD-49 films was attempted without success.
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