Preparation and characterization of sulfonated polyethersulfone ...
2013年3月1日 · Sulfonated polyethersulfone (SPES) was synthesized through a feasible way by introducing sulfonic groups onto amino-substituted PES, and characterized by FT-IR, 1 H NMR and GPC. The obtained SPES could be directly blended with PES at any ratios to prepare modified membranes.
Polyethersulfone membrane modified by zwitterionic groups for …
2023年6月25日 · The chemical structure and reaction sites of polymer solids (pure PES, PES-NO 2, PES-NH 2) were investigated by 1 H NMR (Bruker 400 M, Switzerland) using DMSO‑d 6 as solvents. The chemical structure and components of membranes were characterized using FTIR attenuated total reflection (ATR-FTIR, Nicolet-6700, Thermo Fisher, America) and X-ray ...
Fabrication of PES/PVP Water Filtration Membranes Using …
2019年7月7日 · In this study, the polyethersulfone membranes (PES/C and PES/N) with highly asymmetrical pore structure were fabricated from hot (70°C) and cold (17°C) casting gels of PES, PVP, and solvent (Cyrene® or NMP), using a nonsolvent phase inversion technique (NIPS).
PES及其共聚酯的合成与性能研究 - 豆丁网
2015年11月4日 · 摘要：采用直接熔融缩聚法制备了聚丁二酸乙二醇酯(pes)和聚(丁二酸乙二醇·共-对苯二甲酸乙二醇酯) (PEST)。 1H．NMR分析表明，合成的共聚酯是典型的无规共聚物。
1 H NMR spectra of (a) PES, (b) cloromethylated PES, and (c) QPES.
To confirm successful fabrication, Fourier-transform infrared spectroscopy and nuclear magnetic resonance (1H-NMR) were used. The membrane properties were enhanced by the addition of ZnO ...
preparation of sulfonated PES (SPES) with different degrees of sulfonation were determined. The presence of sulfonic acid groups in SPES was confirmed by FTIR and NMR spectroscopy. Thermal analysis of the SPES samples revealed higher glass transition temperatures and lower decomposition temperatures with respect to the PES. Introduction
酞侧基聚芳醚砜的核磁共振研究──PES-C的氢谱归属及碳谱峰的确认
2021年3月19日 · 用13C－NMR谱和二维异核化学位移相关谱（HETCOR）归属了酞侧基聚芳醚砜（PES－C）的1H－NMR谱峰,并经二维同核化学位移相关谱（COSY）验证．对原13C－NMR谱峰归属作了部分修正．二维同核及异核相关谱为PES－C的碳、氢核磁谱峰归属提供了重要信息．由PES－C的核磁谱 ...
Preparation and characterization of sulfonated polyethersulfone …
2011年2月15日 · 1 H NMR is a powerful technique used to accurately identify the chemical structure and the position of SO 3 H pendent on the aromatic rings. The chemical structures of both unmodified PES and sulfonated PES are illustrated in Fig. 2 .
Spectrum ¹H-NMR (500 MHz, DMSO-d6) of PES - ResearchGate
Polysulfone membrane (PES) as a commercial product and their nanocomposites (CNTs/PES and graphene/PES) were used as a feedstock in the present research.
¹H NMR spectra of PES, PEF and PESFs - ResearchGate
A series of biobased copolyesters, poly (ethylene sebacate-co-ethylene 2,5-furandicarboxylate) (PESF), were synthesized from available biobased ethylene glycol (EG), sebacic acid (SA) and...