||Electron-Beam Processable Polyimides for High Performance Composite Applications
||Proc. 48th Intl. SAMPE Symp. and Exhib.
||Hoyt Haight, A. E.; Gosau, J. M.; Shkindel, T.; Sprouse, M. R.; Wesson, S. P.; Babow, D. A.
||Electron beam (e-beam) curing of polymer matrix composites (PMCs) is highly desirable from a manufacturing standpoint in that significant cost savings may be realized from the reduced cycle times, the ability to cure large and irregularly shaped parts, and the ability to use inexpensive tooling. However, for many applications in the aerospace and transportation industries, e-beam processable resins currently available do not meet the performance specifications (e.g., excellent thermal stability, high strength, and high toughness). Adherent Technologies, Inc. has recently been developing a graft polyimide-siloxane system incorporating functionalities amenable to cross linking under electron beam irradiation. Films of these polyimide-siloxane graft copolymers were prepared and subjected to electron beam irradiation at a total dose of approximately 150 kGy at a temperature above the glass transition temperature of the copolymer. Production of these materials in larger quantities is currently underway as is the development of an automated system for preparation of prepreg tapes for use in automated tape placement (ATP) equipment. The evaluation of these resins and tape systems will be discussed.
||Polyimides, Radiation Processing, Automated Tape Placement, ATP, e-beam curing, polymer matrix composites, PMC, polyimide-siloxane, copolymers, prepreg tape