Polyacetylinic oligomers suitable for high-temperature polymer-matrix composites are provided. The polyacetylinic oligomers have the formula:
D-A-D
wherein
D is an endcap including at least one crosslinking functionality; and
A is backbone selected from the group consisting of imidesulfone; ether; ethersulfone; amide; imide; ester; estersulfone; etherimide; amideimide; oxazole; oxazole sulfone; thiazole; thiazole sulfone; imidazole; and imidazole sulfone. At least one ethynyl functional group, however, is incorporated into the backbone such that crosslinking is not only realized at the endcaps but also at the ethynyl groups within the backbone of the oligomer itself.
COMPOSITION OF AND METHOD FOR MAKING HIGH PERFORMANCE RESINS FOR INFUSION AND TRANSFER MOLDING PROCESSES
申请人:The Government of the United States as represented by the Administrator of the National Aeronautics and Space Administration
公开号:EP1189973A1
公开(公告)日:2002-03-27
WATER-ENTRAINED-POLYIMIDE CHEMICAL COMPOSITIONS FOR USE IN HIGH-PERFORMANCE COMPOSITE FABRICATION
申请人:Lubowitz Hyman Ralph
公开号:US20080300360A1
公开(公告)日:2008-12-04
Water-entrained compositions comprising colloidal or suspensoidal solutions comprising polyimide pre-polymers/oligomers are described. These compositions are obtained in water by initial dispersion of the resin constituents in water to from colloids or suspensoids. The water-entrained polyimide compositions can be applied to numerous surfaces or more beneficially used for composite fabrication. The coated surfaces or polyimide-pre-polymer impregnated reinforcing materials are subsequently cured and are ideal for providing thermal protection.