4 4 diaminodiphenyl ether

Manufactured by Merck Group

Sourced in United States

4,4′-diaminodiphenyl ether is a chemical compound used in the manufacturing of various laboratory equipment and materials. It serves as a key component in the production process, but a detailed description of its core function would require further information to maintain an unbiased and factual approach.

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5 protocols using 4 4 diaminodiphenyl ether

Synthesis of Polyimide Precursors

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Pyromellitic dianhydride, 4,4′-diaminodiphenyl ether, m-phenylenediamine, 3,4′-diaminodiphenyl ether, p-phenylenediamine, 5,5′-((propane-2,2-diylbis(4,1-phenylene))bis(oxy))bis(isobenzofuran-1,3-dione), and 4,4′-diaminodiphenylmethane were purchased from Sigma-Aldrich. α,α′-Bis(4-aminophenyl)−1,4-diisopropylbenzene, 4-bis(4-aminophenoxy)-benzene, 4,4′-(hexafluoroisopropylidene)diphthalic anhydride and 4,4′-oxydiphthalic anhydride were purchased from TCI. 2-Methyl-m-phenylenediamine and 1,2,4,5-cyclohexanetetracarboxylic dianhydride were provided by Anhui Zesheng Technology Co., Ltd.

Wang R., Zhu Y., Fu J., Yang M., Ran Z., Li J., Li M., Hu J., He J, & Li Q. (2023). Designing tailored combinations of structural units in polymer dielectrics for high-temperature capacitive energy storage. Nature Communications, 14, 2406.

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Synthesis of Copoly(urethane-imide) Polymer

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The copoly(urethane-imide) chosen as the object of study was obtained according to the synthesis method outlined in our initial studies [39 (link),40 (link),41 (link),42 (link),43 (link),44 (link),45 (link)]. At that, pyromellitic anhydride with a melting point (T_m)~283–286 °C, Sigma-Aldrich Co., LLC, Burlington, MA, USA; polycaprolactone with molecular weight Mn = 2000, Sigma-Aldrich Co. LLC with melting point (T_m)~50 °C; 2,4- toluene diisocyanate with melting point (T_m)~20–22 °C, Sigma-Aldrich Co., LLC; 4,4′-diaminodiphenyl ether with melting point (T_m)~188–192 °C, Sigma-Aldrich Co., LLC. were used as monomers. N,N-dimethylacetamide, Vecton Co., LLC, Russia, Saint Petersburg was used as a solvent.

Didenko A.L., Ivanov A.G., Smirnova V.E., Vaganov G.V., Anokhina T.S., Borisov I.L., Volkov V.V., Volkov A.V, & Kudryavtsev V.V. (2022). Selective Destruction of Soluble Polyurethaneimide as Novel Approach for Fabrication of Insoluble Polyimide Films. Polymers, 14(19), 4130.

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Synthesis of Bis-Aldehydes and PAM

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All chemicals used in the synthesis of bis-aldehydes and PAM were purchased from commercial suppliers and were of high purity. Hydroquinone (m.p. = 172–175 °C), resorcinol (m.p. = 110 °C), pyrocatechol (m.p. = 100–103 °C), 4-fluorobenzaldehyde (98%), 44′-dihydroxybiphenyl (97%, m.p. = 284–285 °C), bisphenol A (m.p. = 158–159 °C), (111,333-hexafluoro)–bisphenol propane (m.p. = 160–163 °C) were obtained from Sigma Aldrich. The chemicals K₂CO₃ anhydrous (Fluka), 14-phenylenediamine (m.p. = 138–143 °C, Sigma Aldrich), 44′-diaminodiphenyl ether (97%, m.p. = 188–192 °C, Sigma Aldrich), p-toluene sulfonic acid monohydrate (PTSA) were purchased from Fluka (Switzerland). The solvents n-hexane, dimethylsulfoxide, and diethyl ether were procured from Merck (Germany) whereas chloroform, ethylacetate, and toluene were purchased from Panreac (Spain). The ethanol, methanol, and N,N-dimethylformamide were obtained from Deijing (Korea) while hydrochloric acid, and sulfuric acid were procured from Riedel-de-Haen (Germany). The solvents used in this work were dried where necessary with standard procedures.[22 ]

Hafeez A., Akhter Z., Gallagher J.F, & Siddiqui H.M. (2016). Liquid phase synthesis of aromatic poly(azomethine)s, their physicochemical properties, and measurement of ex situ electrical conductivity of pelletized powdered samples. Designed Monomers and Polymers, 20(1), 74-88.

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Synthesis of Polyimide Membranes for Heavy Metal Removal

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1,4,5,8-naphthalenetetracarboxylic dianhydride (NTDA), and 4,4′-diaminodiphenyl ether (ODA) were purchased from Sigma Aldrich, and were used as received. Concentrated sulfuric acid (95%), fuming sulfuric acid (SO₃, 60%), m-cresol and polyethyleneimine (Mn ~60 kDa) were purchased from Fisher Scientific, and used as received. Triethylamine (Et₃N) obtained from BDH Chemical Ltd. (Pool, England), distilled and dried with 4A molecular sieve prior to use. Silica gel 100 was purchased from Fluka Chemie AG. Polysulfone (PSf, Udel P-3500), polyvinylpyrrolidone (PVP-K30), and N-methyl-2-pyrrolidone (NMP) (purity > 99.5%) were obtained from Acros Organics. The PVP and NMP were dried at 100 °C for 24 h before use. Analytical grade lead nitrate, cadmium nitrate tetrahydrate, pepsin and bovine serum albumin (BSA) were procured from Sigma Aldrich. All solvents were of reagent grade (Sigma Aldrich). Water was distilled and then de-ionized using a Milli-Q system from Millipore.

Jafar Mazumder M.A., Raja P.H., Isloor A.M., Usman M., Chowdhury S.H., Ali S.A., I.n.a.m.u.d.d.i.n, & Al-Ahmed A. (2020). Assessment of sulfonated homo and co-polyimides incorporated polysulfone ultrafiltration blend membranes for effective removal of heavy metals and proteins. Scientific Reports, 10, 7049.

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Synthesis of Copoly(urethane-imide) Polymer

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The copoly(urethane-imide) chosen as the object of study was obtained using the synthesis method described in our initial studies [28 (link),29 (link),30 (link),31 (link),32 (link),33 (link),34 (link)]. In this case, as monomers, we used pyromellitic anhydride with a melting point (Tm) ~283–286 °C, Sigma-Aldrich Co. LLC, St. Louis, MO, USA; polycaprolactone with molecular weight Mn = 2000 with melting point (Tm) ~50 °C, Sigma-Aldrich Co. LLC; 2,4-toluene diisocyanate with melting point (Tm) ~20–22 °C, Sigma-Aldrich Co. LLC; 4,4′-diaminodiphenyl ether with melting point (Tm) ~188–192 °C, Sigma-Aldrich Co. LLC. N,N-dimethylacetamide, Vecton Co. LLC, London, UK, Russia was used as a solvent.

Sukhanova T.E., Didenko A.L., Borisov I.L., Anokhina T.S., Ivanov A.G., Nesterova A.S., Kobykhno I.A., Yushkin A.A., Kudryavtsev V.V, & Volkov A.V. (2022). Morphological Analysis of Poly(4,4′-oxydiphenylene-pyromellitimide)-Based Organic Solvent Nanofiltration Membranes Formed by the Solution Method. Membranes, 12(12), 1235.

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