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Abstract
AbstractThe relation between the structure and viscoelastic properties of the epoxy resins prepared from o‐cresol novolacs was studied. Our model epoxy resins were two kinds of epoxy compounds synthesized from three‐nuclei and four‐nuclei o‐cresol novolacs. In addition to these models, a commercially available o‐cresol novolac‐type epoxy resin was also studied. Each of the three epoxy compounds was cured with one of three kinds of novolacs, which were starting materials of the above‐mentioned epoxy resins. Characteristic properties of the cured resins, such as glass transition temperature (Tg), average molecular weight between crosslinking points (M¯c), and front factor (ϕ) were obtained. It was concluded that the number of functional groups contained in the curing system almost dominated the viscoelastic properties of the cured resins.
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