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Title: Development of epoxy matrices for filament-wound graphite structures

Abstract

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.

Authors:
; ; ;
Publication Date:
Research Org.:
Lawrence Livermore National Lab., CA (USA)
OSTI Identifier:
6222272
Report Number(s):
UCRL-90946; CONF-850323-1
ON: DE85003674
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Conference
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
Subject:
36 MATERIALS SCIENCE; 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)

Citation Formats

Morgan, R J, Walkup, C M, Kong, F M, and Mones, E T. Development of epoxy matrices for filament-wound graphite structures. United States: N. p., 1984. Web.
Morgan, R J, Walkup, C M, Kong, F M, & Mones, E T. Development of epoxy matrices for filament-wound graphite structures. United States.
Morgan, R J, Walkup, C M, Kong, F M, and Mones, E T. 1984. "Development of epoxy matrices for filament-wound graphite structures". United States.
@article{osti_6222272,
title = {Development of epoxy matrices for filament-wound graphite structures},
author = {Morgan, R J and Walkup, C M and Kong, F M and Mones, E T},
abstractNote = {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.},
doi = {},
url = {https://www.osti.gov/biblio/6222272}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Nov 27 00:00:00 EST 1984},
month = {Tue Nov 27 00:00:00 EST 1984}
}

Conference:
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