Accession Number : ADA102122


Title :   Imide Modified Epoxy Matrix Resin.


Descriptive Note : Final rept.,


Corporate Author : UNITED TECHNOLOGIES RESEARCH CENTER EAST HARTFORD CT


Personal Author(s) : Scola,D A ; Pater,R H


Full Text : http://www.dtic.mil/get-tr-doc/pdf?AD=ADA102122


Report Date : 01 Feb 1981


Pagination or Media Count : 116


Abstract : This report describes the results of a ten-month program designed to develop high char yield epoxy resins using novel bisimide amines (BIA's) as curing agents with a state-of-the-art epoxy resin, MY 720. Four bisimide amines were evaluated in this program. These were the BIA's derived from the 6F anhydride (4,4'-hexafluoroisopropylidene biphthalic anhydride) and the aromatic diamines, 4,4'-diaminodiphenylsulfone (DDS), 4,4'-methylenedianiline (MDA), 4,4'-oxydianiline (ODA) and 4,4'-paraphenylenediamine (PDA). The BIA's were abbreviated 6F-DDS, 6F-MDA, 6F-ODA and 6F-PDA, corresponding to the 6F anhydride and diamines mentioned above. Stoichiometric quantities of the epoxy resin and the BIA's (MY 720/6F-DDS, MY 720/6F-DDS/DDS, MY 720/6F-MDA/MDA, MY 720/6F-50:50 mixture of a BIA and the parent diamine (MY 720/6F-DDS/DDS, MY 720/6F-MDS/MDS, MY 720/6F-ODS/ODA and MY 720/6F-PDA/PDA) were studied to determine the cure cycle required for preparation of resin specimens. The bisimide cured epoxies were designated IME's (for imide modified epoxy). The physical, thermal and mechanical properties of these novel resins were determined. The levels of moisture absorption exhibited by the bisimide amine cured epoxies (IME's) were considerably lower than the state-of-the-art epoxies. The strain-to-failure of the control resin system (MY 720/DDS) was improved 25% by replacement of DDS with 6F-DDS (MY 720/6F-DDS). Each BIA-containing resin exhibited twice the char yield of the control resin MY 720/DDS (40% char vs 20% char). Graphite fiber reinforced control (C) and IME resins were fabricated and characterized.


Descriptors :   *MATRIX MATERIALS , *AMINES , *CURING AGENTS , *EPOXY RESINS , *IMIDES , *CHARRING , THERMAL PROPERTIES , MECHANICAL PROPERTIES , PHYSICAL PROPERTIES , RESISTANCE , MOISTURE , FLUOROPOLYMERS


Subject Categories : Laminates and Composite Materials
      Plastics


Distribution Statement : APPROVED FOR PUBLIC RELEASE