Investigation of the Nature of Functional Groups of Graphene Membranes by Means of IR Spectroscopy

2020 ◽  
Keyword(s):  
Ir Spectroscopy ◽  
Functional Groups ◽  
Graphene Membranes

Polymer Characterization by ir Spectroscopy

1971 ◽  
Vol 25 (1) ◽  
pp. 76-79 ◽  
Author(s):  
J. P. Luongo
Keyword(s):  
Ir Spectroscopy ◽  
Functional Groups ◽  
Spectral Features ◽  
Synthetic Resin ◽  
Polymer Characterization ◽  
Stereoregular Polymers ◽  
Structural Arrangements ◽  
Natural And Synthetic

The highly advanced polymerization techniques developed in the natural and synthetic resin industries have created a strong demand, not only for general identification of polymeric substances, but for the characterization of the newer stereoregular polymers. Although the gross ir spectral features of a particular polymer are mostly attributable to its functional groups, there are often many small but significant spectral differences which are associated with different structural arrangements that can exist within the polymer. Thus, in a number of cases the subtle spectral differences can be correlated with molecular configurations and used as evidence for various structures.

scholarly journals FTIR analysis and the effects of alkyd/melamine resin ratio on the properties of the coatings

2009 ◽  
Vol 63 (6) ◽  
pp. 637-643 ◽  
Author(s):  
Suzana Cakic ◽  
Ljiljana Boskovic
Keyword(s):  
Ir Spectroscopy ◽  
Functional Groups ◽  
Curing Temperature ◽  
Ftir Analysis ◽  
Curing Time ◽  
Melamine Resin ◽  
Coating Properties ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

Alkyd/melamine resin mixtures are mainly used in industrial baking enamels. The effects of the alkyd/butylated melamine resin ratio (from 90/10 to 50/50) and curing temperature (from 110 to 180?C) on the crosslinking and properties of the coating are presented in this paper. The curing reactions through functional groups of resins were monitored by FT-IR spectroscopy. The hardness, elasticity, degree of adherence and gloss were also determined. Optimal coating properties could be achieved with an alkyd/melamine resin ratio of 80/20, a curing temperature of 150?C and a curing time of 20 min.

Mixed esters of xanthogenic acids containing carbonyl, dithiocarbamine and thiocyane group and their research as additives improving tribological characteristics

2021 ◽  
Vol 04 (1) ◽  
pp. 60-64
Author(s):  
B.I. Musayeva ◽  
◽  
V.M. Farzaliyev ◽  
G.G. Ismayilova ◽  
N.N. Novotorzhina ◽  
...  
Keyword(s):  
Ir Spectroscopy ◽  
Functional Groups ◽  
Raw Materials ◽  
Environmentally Friendly ◽  
Monochloroacetic Acid ◽  
Tribological Characteristics ◽  
Sequential Reaction ◽  
Diethyl Dithiocarbamate ◽  
Sodium Diethyl Dithiocarbamate

On the basis of environmentally friendly raw materials of glycerol, by its interaction with monochloroacetic acid, 1,2,3-(trichloroacetyl)triglyceride was synthesized, which is used for further syntheses of xanthogenic acid derivatives containing a number of functional groups  dithiocarbamic, thiocyanic. The reaction of 1,2,3-(trichloroacetyl) triglyceride with potassium alkylxanthate in a ratio of 1:1 and 1:2 gave 1-butylxanthogenatoacetoxy-2,3-(dichloroacetoxy) propane and 1,3-di(alkylxanthogenatoacetoxy)-2-chloroacetoxypropane. Mixed esters of xanthogenic acid containing dithiocarbamic and thiocyanic groups were synthesized by the interaction of 1,2,3-(trichloroacetyl) triglyceride in the corresponding sequence, first with sodium diethyl dithiocarbamate, with potassium butylxanthate, as a result 1-butylxanthogenatoacetoxy-2-chloracetoxy-3-(diethyldithiocarbamatoacetoxy) propane. Sequential reaction of 1,2,3-(trichloroacetyl) triglyceride with potassium rhodanide with potassium butylxanthate gave 1-butylxanthogenatoacetoxy-2-chloroacetoxy-3-(thiocyanatoacetoxy)propane. The structure of the synthesized compounds has been proven by IR spectroscopy. The compounds have been tested as additives to improve the tribological characteristics of oils and have been shown to be effective.

scholarly journals Application of FT-IR Spectroscopy for Fingerprinting Bioactive Molecules in a Nutraceutical PROMEN, comparatively with Plantingredients

2013 ◽  
Vol 70 (1) ◽  
pp. 68
Author(s):  
Florina Csernatoni ◽  
Carmen Socaciu ◽  
Raluca Maria Pop ◽  
Florinela Fetea
Keyword(s):  
Ir Spectroscopy ◽  
Functional Groups ◽  
Food Supplement ◽  
Bioactive Molecules ◽  
Ft Ir ◽  
Fingerprint Region ◽  
Phenolic Derivatives ◽  
Ft Ir Spectroscopy

The aim of this study is to characterize and identify the main biomarkers of food supplement PROMEN by analysis of plant ingredients comparatively with the final product. Alcoholic extracts of plants were prepared at 15% plant content and purified fractions were analyzed by FTIR screening. The fingerprint region (1000 to 1500 cm-1) indicated the presence of specific functional groups to identify and monitor the phenolic derivatives.

Coordination of uranium(vi) with functional groups of bacterial lipopolysaccharide studied by EXAFS and FT-IR spectroscopy

2011 ◽  
Vol 40 (38) ◽  
pp. 9868 ◽  
Author(s):  
Astrid Barkleit ◽  
Harald Foerstendorf ◽  
Bo Li ◽  
André Rossberg ◽  
Henry Moll ◽  
...  
Keyword(s):  
Ir Spectroscopy ◽  
Functional Groups ◽  
Bacterial Lipopolysaccharide ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

Modifying the Sorption Capacity of Biopolymers by the Mechanochemical Activation

2012 ◽  
Vol 326-328 ◽  
pp. 504-508
Author(s):  
Svetlana Lugovskoy ◽  
Michael Zinigrad ◽  
Moshe Eliaszade
Keyword(s):  
Hydrogen Bond ◽  
Ir Spectroscopy ◽  
Functional Groups ◽  
Sorption Capacity ◽  
Mechanochemical Activation ◽  
Activation Process ◽  
Structure Deformation ◽  
Developed Surface ◽  
Load Release ◽  
Activation Times

Mechanochemical activation (MCA) of electrode lignin was performed and the activated lignin was studied by IR-spectroscopy for different activation times. The activated lignin was tested for the ability of binding Cr2O72-, Cu2+, Ni2+ ions. It was established that structure deformation, which does not distort the stronger hydrogen bond lattice, but leads to the formation of highly developed surface with active functional groups, occurs in the course of MCA. Weaker inter-layer bonds are broken in the activation process and quickly recovered after the load release. The comparison of the sorption capacity of Cr2O72-, Cu2+, Ni2+ ions by the MCA treated vs. inactivated lignin for different activation times was performed.

scholarly journals ОЦІНКА НОВИХ ІЗОЛЯТІВ ГРИБА PLEUROTUS OSTREATUS (JACQ.: FR.) KUMMER ЗА ДОПОМОГОЮ ІНФРАЧЕРВОНОЇ СПЕКТРОСКОПІЇ

2012 ◽  
pp. 34-37
Author(s):  
Н. В. Дорошкевич ◽  
В. М. Шевкопляс
Keyword(s):  
Ir Spectroscopy ◽  
Functional Groups ◽  
Optical Density ◽  
Pleurotus Ostreatus ◽  
Nutrient Medium ◽  
Extracellular Proteins ◽  
Extracellular Protein ◽  
Adsorption Band ◽  
Preliminary Estimation ◽  
The Relationship

Зроблено попередню оцінку ізолятів грибаP. ostreatus за допомогою інфрачервоної (ІЧ) спек-троскопії позаклітинних білків. Встановлено, щосмуги поглинання при 3350, 2920, 1410, 1300–1000,925–850 и 690–600 см-1 можуть свідчити про на-явність у структурі різних функціональних груп.Дані ІЧ-спектроскопії вказують, що оптичнащільність смуг поглинання (Е) позаклітинних біл-ків характеризується різною інтенсивністю, щопов’язано з фізіологічними особливостями вивче-них ізолятів гриба. Показано, що в якості додат-кової оцінки нових ізолятів ґливи звичайної можнавикористовувати інтенсивність смуги поглинанняпри 1040 см-1, яка вказує на наявність у позаклі-тинних білках активних кисневих сполук, за допо-могою яких гриб здійснює деструкцію вуглецю жи-вильного субстрату. Встановлено взаємозв'язокміж накопиченням біомаси грибом на рідкомуживильному середовищі та інтенсивністю смугипоглинання ІЧ-спектру позаклітинних білківпри 1040 см-1. In this work a preliminary estimation of new strains of theP. ostreatus using IR-spectroscopy extracellular protein hasbeen made. It is shown that the adsorption band at 3350, 2920,1410, 1300–1000, 925–850 and 690–600 sm-1 indicate thatvarious functional groups take place. Data IR-spectroscopyindicates that optical density of adsorption has differentintensity and it is as result of physiological particularitiesstudied strains. It is shown that an adsorption band at 1040 sm-1characterizes at present within extracellular proteins of activeoxygen, which participates in a destruction of the nutrientmedium carbon. The intensity of adsorption band at 1040 sm-1may be used for additional estimation of physiological activityof the fungus. The relationship between accumulation biomassof new isolates at fluid nutrient medium and intensity ofadsorption band.

scholarly journals Synthesis of nitrogen-containing phenol formaldehyde oligomers,grafted with vegetable oils

2015 ◽  
Vol 11 (8) ◽  
pp. 3819-3827
Author(s):  
M.N. Amiraslanova
Keyword(s):  
Double Bond ◽  
Ir Spectroscopy ◽  
Soybean Oil ◽  
Functional Groups ◽  
Vegetable Oils ◽  
Phenol Formaldehyde ◽  
Chemical Properties ◽  
Probable Structure ◽  
Coating Materials ◽  
Physical Chemical

Synthesis of nitrogen-containing phenolformaldehyde oligomers (phfo), grafted with vegetable  oils is aimed at the acquisition of new range coating materials. Oil has been used as an example of soybean and linseed oils. The interaction  between phfo and vegetable oil is carried out by  means of functional groups as result of the oxidation prosesses on carbon atoms adjacent to the double bond and the functional groups,including oligomer macromolecules. Physical-chemical properties of nitrogen-containing as result of modification by means of benzoguanamine (bga)  monoalkyl (C8-C12)phfo, grafted with soybean oil is reflected. The probable structure  of the nitrogen-containing monoalkyl(C8-C12)phfo, grafted with soybean oil has been studied by means of NMR- and IR-spectroscopy methods. The mechanism of the occurrence of first and second stages of the process are described.

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