Manufacturing Thermoplastic Matrix Composites.
Final rept. Oct 85-Apr 88,
STANFORD UNIV CA DEPT OF AERONAUTICS AND ASTRONAUTICS
Pagination or Media Count:
A model is presented of the steps involved in the manufacturing process of semicrystalline thermoplastic matrix composites. The model relates the temperature and pressure applied during processing to a the flow of the matrix into the fiber tow, b the formation of contact and bond between adjacent plies, and c the crystallinity. The results of the model were verified by tests performed with PEEK 150P polymer and APC-2 graphitePEEK composite. In addition the mechanical properties of PEEK 150P polymer and APC-2 graphitePEEK composite were measured at different crystallinities, from 0 to 40 weight percent. For PEEK 150P the tensile, compressive, and shear properties and the fracture toughness were measured. For APC-2 the Mode I and Mode II fracture toughnesses and fracture energies as well as the mixed mode stress intensity factors were determined. Expressions are presented relating the mechanical properties to crystallinity. Finally, data are given which compare the mechanical properties of materials in which the same different thermal processes.
- Polymer Chemistry
- Laminates and Composite Materials