Simultaneous synthesis from thermosetting and thermoplastic components yields polyimide with outstanding properties. Involves process in which one polymer cross-linked in immediate presence of other, undergoing simultaneous linear chain extension. New material, LaRC-RP40 synthesized from high-temperature thermosetting imide prepolymer and from thermoplastic monomer. Three significantly improved properties: toughness, resistance to microcracking, and glass-transition temperature. Shows promise as high-temperature matrix resin for variety of components of aircraft engines and for use in other aerospace structures.
Tough, Microcracking-Resistant, High-Temperature Polymer
NASA Tech Briefs ; 14 , 6
1990-06-01
Miscellaneous
No indication
English
Effect of Microcracking on Durability of High-Strength Concrete
Online Contents | 1999
|Effect of Microcracking on Durability of High-Strength Concrete
Transportation Research Record | 1999
|