Development of epoxy matrices for filament-wound graphite structures
This paper reviews our program to develop epoxy matrix systems for filament-wound graphite structures. The criteria for this matrix development program requires that the epoxide and amine components are processible and non-toxic; and the corresponding matrix itself is tough, possesses a Tg > 120/sup 0/C and does not lose its mechanical-thermal properties upon exposure to service environment conditions. We report our data on processible, hindered amine cured-epoxide matrices such as menthane or 2,5 dimethyl 2,5 hexane diamine cured bis-phenol-A-diglycidyl ether (DGEBA) epoxide systems in the presence of viscosity-lowering diluents. To produce tough, processible matrices that do not deteriorate upon exposure to service environment conditions requires a knowledge of the network structure formed and how such structure may deteriorate under molecular flow associated with the shear-band toughening mechanisms. For amine-cured DGEBA matrices we report deterioration in the mechanical response and Tg after plastic flow has occurred in such glasses. Permanent chemical changes that occur during this flow induced degradation process were monitored by stress-Fourier transform infrared spectroscopy. The ability to eliminate the aging of tough, cross-linked composite matrices upon molecular flow is discussed in terms of networks with segments of equal extensibility. 15 references, 4 figures, 2 tables.
- Research Organization:
- Lawrence Livermore National Lab., CA (USA)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 6222272
- Report Number(s):
- UCRL-90946; CONF-850323-1; ON: DE85003674
- Resource Relation:
- Conference: 30. national meeting of the Society for the Advancement of Material and Process Engineering, Anaheim, CA, USA, 19 Mar 1985; Other Information: Portions are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
Similar Records
Chronic dermal toxicity of epoxy resins. I. Skin carcinogenic potency and general toxicity
Reactions of DGEBA epoxy cured with diethanolamine: Isoconversional kinetics and implications to network structure
Related Subjects
EPOXIDES
CURING
MECHANICAL PROPERTIES
AGING
AMINES
COMPOSITE MATERIALS
CROSS-LINKING
EXPERIMENTAL DATA
INFRARED SPECTRA
RESINS
CHEMICAL REACTIONS
DATA
INFORMATION
MATERIALS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
ORGANIC POLYMERS
PETROCHEMICALS
PETROLEUM PRODUCTS
POLYMERIZATION
POLYMERS
SPECTRA
360401* - Polymers & Plastics- Preparation & Fabrication- (-1987)
360403 - Materials- Polymers & Plastics- Mechanical Properties- (-1987)