Synthesis and characterization of low‐molecular‐weight polyacrolein

Marques, Maria de Fátima Vieira; Pinto, Patricia Reis; Andrade, Cristina T.; Michel, Ricardo C.

doi:10.1002/app.29533

Cited by 9 publications

(4 citation statements)

References 21 publications

(26 reference statements)

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“…FTIR spectra of pristine GCF and PEIAA-GCF samples reveal that the PEIAA-GCF sample had amino and carboxylic acid groups (amines and carboxylic acids). In the case of the pristine GCF, Figure 2 shows oxygen-containing groups in the PEIAA-GCF over a very broad band in the 3300-2500 cm -1 region for hydroxyl (O-H) stretching, 3 Energy Material Advances intense bands from 1760 to 1690 cm -1 and 1320-1200 cm -1 corresponding to C=O (polymeric aldehyde segment with carboxylic acids) [24,25]. C-OH vibration comprised of a mixture of C-O stretch and C-O-H bend with the appearance of typical N-H and C-N stretching vibrations corresponding to amine groups and PEI backbone.…”

Section: Resultsmentioning

confidence: 99%

Crosslinked Polyethyleneimine Gel Polymer Interface to Improve Cycling Stability of RFBs

et al. 2022

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Redox flow batteries are considered a promising technology for grid energy storage. However, capacity decay caused by crossover of active materials is a universal challenge for many flow battery systems, which are based on various chemistries. In this paper, using the vanadium redox flow battery as an example, we demonstrate a new gel polymer interface (GPI) consisting of crosslinked polyethyleneimine with a large amount of amino and carboxylic acid groups introduced between the positive electrode and the membrane. The GPI functions as a key component to prevent vanadium ions from crossing the membrane, thus supporting stable long-term cycling. Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) measurements were conducted to investigate the effect of GPI on the electrochemical properties of graphitic carbon electrodes (GCFs) and redox reaction of catholyte. X-ray photoelectron spectroscopy (XPS) and 1H nuclear magnetic resonance (NMR) spectra demonstrated that the crosslinked GPI is chemically stable for 100 cycles without dissolution of polymers and swelling in the strong acidic electrolytes. Results from inductively coupled plasma mass spectrometry (ICP-MS), Fourier-transform infrared (FTIR) spectroscopy, and energy-dispersive X-ray (EDX) spectroscopy proved that the GPI is effective in maintaining the concentration of vanadium species in their respective half-cells, resulting in improved cycling stability because of it prevents active species from crossing the membrane and stabilizes the oxidation states of active species.

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Section: Resultsmentioning

confidence: 99%

Crosslinked Polyethyleneimine Gel Polymer Interface to Improve Cycling Stability of RFBs

et al. 2022

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“…Thermal degradation starts around 30 C (elimination of volatiles) followed by a degradation peak around 100 C that corresponds to the water loss contained in the polymer. At rst sight, the polymer prepared with BPPCl catalyst seemed to be more stable below 100 C, but the weight loss of this polymer is more important than the other ones at larger 35 Since no cyclic structure was identied by IR and NMR in the polymer backbone, we think that this latter loss peak is due to a complex residue generated during the polymer thermal degradation. Deconvolution of ATG curves allows estimating the amount of the chemical functions in each polymer.…”

Section: Preliminary Screeningmentioning

confidence: 89%

Ionic oligomerization of acrolein in water

2013

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The main purpose of this study was to generate aldehyde-functionalized macromolecules that are soluble in common solvents, to be used as new cross-linkers for polymer materials. To do so, the synthesis of oligo(acrolein)s in water, at room temperature, has been performed by anionic and cationic polymerization processes. Using indium metal as a Lewis acid, optimized polymerization conditions reached molar masses around 2000 g mol À1 and a final aldehyde content of typically 30-40 mol%, as measured by chemical titration and 1 H NMR spectroscopy.

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“…The peak of 175 and 430 °C are assigned, respectively, to the degradation of double bonds and carbonyl bonds in agreement with the literature. [ 13 ] In addition, the polymer decomposes 10% of weight at about 145 °C. The results above indicate that the polymer shows good thermostability.…”

Section: Resultsmentioning

confidence: 99%

The Synthesis and Characterization of Polyacrolein through Radical Polymerization

Tang

et al. 2020

Macro Reaction Engineering

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A radical polymerization reaction of acrolein is reported in this article. The free radical initiator which can effectively promote the free radical polymerization of acrolein is screened out. The optimal conditions of the reaction are investigated and the yield could be up to 93.67%, in which the ratio of initiator to monomer is 1:50, monomer concentration is 7.5 mol L−1, reaction temperature is 50 °C, and the reaction time is 6 h. The structure characterizations of the obtained polymers are performed using hydrogen nuclear magnetic resonance spectroscopy, fouriertransform infrared spectroscopy, and matrix‐assisted laser desorption ionization time of fligh mass spectroscopy. The results show that the structure of the polymer contains fragments generated by decomposition of the initiator, aldehyde groups, and vinyl groups. The reaction mechanism of acrolein polymerization in the presence of free radical initiator is proposed. Thus, a novel method for the preparation of polyacrolein via radical polymerization is provided in this article.

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Synthesis and characterization of low‐molecular‐weight polyacrolein

Cited by 9 publications

References 21 publications

Crosslinked Polyethyleneimine Gel Polymer Interface to Improve Cycling Stability of RFBs

Crosslinked Polyethyleneimine Gel Polymer Interface to Improve Cycling Stability of RFBs

Ionic oligomerization of acrolein in water

The Synthesis and Characterization of Polyacrolein through Radical Polymerization

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