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Epoxy resins physical aging

Alcoutlabi, M., Briatico-Vangosa, F., McKenna, G.B. Effect of chemical activity jumps on the viscoelastic behavior of an epoxy resin Physical aging response in carbon dioxide pressure jumps. J. Polym. Sci. Part B Polym. Phys. 40, 2050 (2002)... [Pg.84]

Numerous studies have been reported on the effect of diffusion of water into epoxy resins 177 178>. It is generally agreed that moisture acts as a plasticizer which lowers the Tg of the resin uo 134). Very little work, however, has been reported on the effect of physical aging on the diffusion behavior of water into network epoxies. This Section of the review summarizes the first attempt to study such an effect on TGDDM-DDS epoxy/water interactions. [Pg.152]

Fluorescence probes to study micro- and macromolecular motions, interactions and reactions continue to attract much interest. The moisture content in silk has been found to shift its intrinsic fluorescence spectrum338 while the physical aging of epoxy resins has been monitored using a free volume dependent fluorescent probe... [Pg.450]

Breach, C.D., Folkes, M.J., and Barton, J.M. (1992) Physical ageing of an epoxy resin/polyethersulphone blend. Polymer, 33, 3080. [Pg.229]

Jong, S.R. and Yu, TL. (1997) Physical aging of poly (ether sulfone)-modified epoxy resin. J. Polym. Sci. Polym. Phys.,... [Pg.229]

Research on bisphenol-A epoxy resins composed of the diglycidyl ether of bisphenol-A (DGEBA) monomer have been mixed with respect to the physical aging of the polymer network when subjected to sub-T annealing. [Pg.2595]

For example, the strain-to-failure of the network formed by curing DGEBA with nadic methyl anhydride (NMA) and the catalyst benzyldimethylamine (BDMA) decreases from 12 % to 6 % after 56 days at 23 °C [5]. Physical aging has also been observed in amine cured epoxy resin systems and in an uncross-linked 28,000 g/mol linear epoxy resin tested under wet conditions [6]. In contrast, DGEBA homo-polymerized with piperidine (subsequently... [Pg.2595]

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See also in sourсe #XX -- [ Pg.629 ]



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