Investigation conducted to determine free volumes and water-absorption characteristics of two types of thermoplastic polymide as functions of annealing histories. Reductions reach asymptotic values after several annealing cycles. High-temperature thermoplastics excellent candidates for use in aerospace applications. Graphite-fiber composites containing thermoplastic matrices have wide applicability.
Annealing Reduces Free Volumes In Thermoplastics
NASA Tech Briefs ; 12 , 8
1988-09-01
Miscellaneous
No indication
English
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