A Study on the Curing and Toughening Effect of Terminal 2-Qxazoline Polyether on Epoxy Resin

Abstract

Abstract: The curing reaction of epoxy resin with 2-oxazoline-terminated poly(propylene oxide) (active polyether) prepared by cyanoethylation and oxazoline. cyclization from hydroxy-terminated polyether is-studied by IR and DSC analysis. The apparent rate constants for different temperatures and apparent activation energy of the curing reaction are evaluated by DSC method. The mechanism of curing reaction is discussed. The physical and mechanical properties of cured epoxy system toughened by the active polyether with different molecular weights is estimated. The results show that via selecting the amount of polyether used and its MW, the cured systems may possess higher fracture toughness, while retaining the valuable properties of the rigid system. The active polyether can be used as a kind of latent-curing and toughening agent for epoxy resin.

Key words: 2-Oxazoline-terminated polyether, Epoxy resin, Toughening effect

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Wang Yumin, Pan Enli, Liu Guozhi . A Study on the Curing and Toughening Effect of Terminal 2-Qxazoline Polyether on Epoxy Resin[J]. Chem. J. Chinese Universities, 1990, 11(8): 877.

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A Study on the Curing and Toughening Effect of Terminal 2-Qxazoline Polyether on Epoxy Resin

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