Multinuclear solid-state NMR investigation of the moisture distribution in PEEK-PBI and PEKK-PBI blends
作者： Jacqueline C. Pope , Hung-Jue Sue , Tim Bremner , Janet Blümel
DOI: 10.1002/APP.41421
关键词:
摘要: Blends of polyaryletherketones (PAEK), such as polyetheretherketones (PEEK) and polyetherketoneketones (PEKK), with polybenzimidazole (PBI) are commercial interest due to their improved high-temperature stability wear properties. The changes PBI its PEEK- PEKK-blends (50 : 50 wt %) after immersing them in liquid H2O D2O, exposing D2O steam at elevated temperatures pressures investigated by multinuclear solid-state NMR IR spectroscopy. Macroscopic morphological chemical on the molecular scale, which take place upon steam-treatment extent reversibility moisture uptake have been investigated. Interactions reactions water, steam, aqueous solutions LiCl ZnBr2 functional groups polymer components studied using combination IR, 1H wideline, 2H, 7Li, 79Br MAS, well 13C 15N CP/MAS Different locations types water protons blends described has proven be mainly responsible for salt into blends. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 41421.
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