Epoxide Moisture Absorption Studied by Positron Lifetime Spectroscopy
In the last years there have been made several studies, involving many materials, with the aim of trying to explain some physical, chemical and mechanical macroscopic properties of these materials, across the study of the free volumes at the atomic and molecular scale. The positron annihilation lifetime spectroscopy (PALS) is one of the most widely used in this type of studies, and it was here used to characterize the free volumes fraction of a commercial epoxy and trying to understand the mechanism associated with the process of moisture absorption which leads to an increase of mass and volume on this commercial epoxy.
Ana Maria Pires Pinto and António Sérgio Pouzada
J.M.M. Luís et al., "Epoxide Moisture Absorption Studied by Positron Lifetime Spectroscopy", Materials Science Forum, Vols. 730-732, pp. 988-993, 2013