Pilot Prepreg Line: A Comprehensive Analysis of Prepreg Quality
ARMY LAB COMMAND WATERTOWN MA MATERIAL TECHNOLOGY LAB
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A pilot prepreg line was used to produce an S2 glass epoxyanhydride prepreg. It was found that the pilot line produced high quality unidirectional glass epoxy tape. The prepreg was evaluated from three standpoints processing, chemistry, and material properties. Both fiber- and matrix-dominated material properties compared favorably with structural S2 glass epoxy laminate data found in published literature. The prepreg line metering and mixing system yielded a consistently well mixed and metered resin. Close attention to collimation of the fiber tows was found to be essential to maintaining tape quality. The prepreg was B-staged at room temperature and this reaction was found to be governed by first order kinetics. The service temperature of the cured laminate was typically found to be about 100 C, but was highly sensitive to the presence of moisture in the B-staging environment.
- Laminates and Composite Materials