Characterization of DGEBA (diglycidyl ethers bisphenol-A) epoxy resins
High-resolution gel permeation chromatography and high-performance liquid chromatography can be applied to commercially available DGEBA epoxy resins to elucidate small but significant differences in the oligomer and impurity compositions of these resins. The GPC profiles can be used to type or identify the various commercial grades of these DGEBA resins. Lot-to-lot consistency and aging characteristics can also be determined using GPC and HPLC. Quantitation of the various oligomers and impurities such as the ..cap alpha..-glycol, isomer, and chlorohydrin species is possible. Using 20% isoconversion predictive cure thermal analysis data, the relative resin reactivity of several liquid, low-molecular DGEBA resins has been measured. These data show that the higher viscosity, higher oligomer content resins, which have higher hydroxyl content, reacted faster with amine cure agents than the lower viscosity, higher purity - and consequently lower hydroxyl content - resins. Thus, a combination of liquid chromatography (GPC or HPLC) and DSC kinetics can be used to establish a correlation or equivalency beween the commercially available low-molecular-weight DGEBA epoxy resins.
- Research Organization:
- Allied Corp., Kansas City, MO (USA). Bendix Kansas City Div.
- DOE Contract Number:
- AC04-76DP00613
- OSTI ID:
- 6648078
- Report Number(s):
- BDX-613-3644; CONF-870589-1; ON: DE87008048
- Resource Relation:
- Conference: GPC symposium, Chicago, IL, USA, 11 May 1987; Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
EPOXIDES
CHEMICAL ANALYSIS
RESINS
CHEMICAL PROPERTIES
CHROMATOGRAPHY
VISCOSITY
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
ORGANIC POLYMERS
PETROCHEMICALS
PETROLEUM PRODUCTS
POLYMERS
SEPARATION PROCESSES
360600* - Other Materials
400102 - Chemical & Spectral Procedures