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首页> 外文期刊>Journal of Applied Polymer Science >Multinuclear Solid-State NMR Investigation of the Moisture Distribution in PEEK-PBI and PEKK-PBI Blends
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Multinuclear Solid-State NMR Investigation of the Moisture Distribution in PEEK-PBI and PEKK-PBI Blends

机译：PEEK-PBI和PEKK-PBI共混物中水分分布的多核固态NMR研究

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摘要

Blends of polyaryletherketones (PAEK), such as polyetheretherketones (PEEK) and polyetherketoneketones (PEKK), with polybenzimidazole (PBI) are of commercial interest due to their improved high-temperature stability and wear properties. The changes of PBI and its PEEK-and PEKK-blends (50 : 50 wt %) after immersing them in liquid H2O and D2O, and exposing them to D2O steam at elevated temperatures and pressures are investigated by multinuclear solid-state NMR and IR spectroscopy. Macroscopic morphological and chemical changes on the molecular scale, which take place upon high-temperature steam-treatment and the extent and reversibility of moisture uptake have been investigated. Interactions and reactions of water, steam, and aqueous solutions of LiCl and ZnBr2 with the functional groups of the polymer components have been studied using D2O in combination with IR, H-1 wideline, H-2, Li-7, and Br-79 MAS, as well as C-13 and N-15 CP/MAS NMR spectroscopy. Different locations and types of water and protons in the blends have been described and PBI has been proven to be mainly responsible for water and salt uptake into the blends. (C) 2014 Wiley Periodicals, Inc.
机译：聚芳基醚酮（PAEK）（例如聚醚醚酮（PEEK）和聚醚酮酮（PEKK））与聚苯并咪唑（PBI）的共混物由于其改善的高温稳定性和耐磨性而具有商业价值。通过多核固态NMR和IR光谱研究了PBI及其PEEK和PEKK混合物（50:50 wt％）在浸入液态H2O和D2O中并在高温和高压下暴露于D2O蒸汽后的变化。 。研究了高温蒸汽处理后发生的分子尺度上的宏观形态和化学变化，并且研究了水分吸收的程度和可逆性。使用D2O与IR，H-1宽线，H-2，Li-7和Br-79结合使用，研究了LiCl和ZnBr2的水，蒸汽和水溶液与聚合物组分官能团的相互作用和反应MAS以及C-13和N-15 CP / MAS NMR光谱。已经描述了混合物中水和质子的不同位置和类型，并且已证明PBI是导致混合物中水和盐吸收的主要原因。 （C）2014威利期刊公司

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