Molecular Mechanisms of Additive Fortification in Model Epoxy Resins: A Solid State NMR Study
作者:Christoph F. Kins、Dmytro Dudenko、Daniel Sebastiani、Gunther Brunklaus
DOI:10.1021/ma101374m
日期:2010.9.14
The bulk properties of polymers are often adjusted via addition of a complex blend of compounds collectively known as additives, where so-called molecular fortifiers (or antiplasticizers) may improve the mechanical properties. In the present work, insight into molecular mechanisms of additive-fortification in model epoxy resins was obtained from multinuclear solid-state NMR analysis. In particular, we have demonstrated a "free molecule"-type behavior of DMSO-d(6) in DMSO-fortified resins similar to common inclusion compounds thereby revealing mere filling of free volume. In case of DMMP-fortified resins, however, chemical modification during postcure of the epoxy resin is observed yielding methyl methylphosphonate (MMP) and salt formation, where dynamic heterogeneities of MMP-d(3) suggest a rather complex mechanism of fortification. The interpretation of NMR data was further supported by oh initio calculations.
Moodre, Roy B.; Moustras, Manos Z.; Read, Gordon, Journal of Chemical Research, Miniprint, 1996, # 3, p. 855 - 876
作者:Moodre, Roy B.、Moustras, Manos Z.、Read, Gordon、Sandall, John P. B.
DOI:——
日期:——
The infrared spectra of ethylenediamine complexes—II. Tris-, bis- and mono(ethylenediamine) complexes of metal(II) halides
作者:Alison M.A. Bennett、Gary A. Foulds、David A. Thornton、Gareth M. Watkins