Abstract
Three series of monoepoxide by-product oligomers in diglycidyl ethers of bisphenol A type epoxy resins were separated by reversed-phase gradient elution high-performance liquid chromatography. The by-product oligomers studied have a functional group other than a 2,3-epoxypropyloxy group as an endgroup: they have a 2,3-dihydroxypropyloxy, a 2-hydroxy-3-methoxypropyloxy or a 2-hydroxy-3- p-tert.-butylphenoxypropyloxy endgroup. Three oligomers of each series of by-products were isolated and characterized by infrared, mass and carbon-13 nuclear magnetic resonance spectrometry.
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