In developed series of high-flow PMR-type polyimide resins, 2, 2'-bis(trifluoromethyl)-4, 4'-diaminobiphenyl (BTDB) substituted for 1, 4-pheylenediamine in PMR-II formulation. Polyimides designated either as PMR-12F when nadic ester (NE) end caps used, or as V-CAP-12F when p-aminostyrene end caps used. High-molecular-weight, addition-curing polyimides based on BTBD and HFDE highly processable high-temperature matrix resins used to make composite materials with excellent retention of properties during long-term exposure to air at 650 degrees F or higher temperature. Furthermore, 12F addition-curing polyimides useful for electronic applications; fluorinated rigid-rod polyimides known to exhibit low thermal expansion coefficients as well as low absorption of moisture.
High-Flow, High-Molecular-Weight, Addition-Curing Polyimides
NASA Tech Briefs ; 17 , 12
01.12.1993
Sonstige
Keine Angabe
Englisch
Materials - Room-Temperature, Ultraviolet Curing of Polyimides
Online Contents | 1999
Application of Direct Pressure to Resin in Curing of Epoxy and Addition Type Polyimides
SAE Technical Papers | 2022
Improved processability of addition polyimides
NTRS | 1977
|Tougher Addition Polyimides Containing Siloxane
NTRS | 1986
|Lipase-Catalyzed Synthesis and Curing of High-Molecular-Weight Polyricinoleate
British Library Online Contents | 2007
|