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Enhancement of Transcrystallinity in Thermoplastic Matrix Composites
The conditions required for producing transcrystallinity in graphite/PEEK composites were identified. Samples were prepared by embedding single Magnamite Graphite IM7 fibers in Stabar K200 PEEK film. IM7 fiber surfaces were treated to obtain five levels of acid/base character. The greatest degree of transcrystallinity was displayed by the most acidic fiber surfaces, CO2 plasma treated, that were produced by quenching the sample from 415 C. All other samples displayed transcrystallinity for only slow cooling or annealed process thermal histories. The result is significant for the rapid fabrication of thermoplastic composites. Researchers were unable to fabricate laminates by stacking multiple piles together and consolidating them using the conditions identified by studies on small laboratory samples. Piles were composed of alternating layers of PEEK and IM7 and during processing the PEEK was melted, but never flowed into the fiber layers.
Enhancement of Transcrystallinity in Thermoplastic Matrix Composites
The conditions required for producing transcrystallinity in graphite/PEEK composites were identified. Samples were prepared by embedding single Magnamite Graphite IM7 fibers in Stabar K200 PEEK film. IM7 fiber surfaces were treated to obtain five levels of acid/base character. The greatest degree of transcrystallinity was displayed by the most acidic fiber surfaces, CO2 plasma treated, that were produced by quenching the sample from 415 C. All other samples displayed transcrystallinity for only slow cooling or annealed process thermal histories. The result is significant for the rapid fabrication of thermoplastic composites. Researchers were unable to fabricate laminates by stacking multiple piles together and consolidating them using the conditions identified by studies on small laboratory samples. Piles were composed of alternating layers of PEEK and IM7 and during processing the PEEK was melted, but never flowed into the fiber layers.
Enhancement of Transcrystallinity in Thermoplastic Matrix Composites
R. E. Allred (author)
1989
32 pages
Report
No indication
English
Composite Materials , Plastics , Engineering Materials , Polymer Chemistry , Thermoplastic resins , Composite materials , Reinforced plastics , Reinforcing fibers , Fiber composites , Matrix materials , Surface chemistry , Laminates , Carbon fibers , Acidity , Heat flux , Physical properties , High temperature tests , Crystallinity , Comparison , Softening points , Heat resistant materials , Transcrystallinity , Poly(Ketone/diether) , Distortion Temperature Under Load , Magnamite Graphite IM7 , Stabar K200 PEEK
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