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Study of the structure of phenol-formaldehyde novolac resins by NMR spectroscopy and gel-permeation chromatography
(Serbian Chemical Society, Belgrade, 1999)
C-13-NMR spectroscopy and gel-permeation chromatography studies were carried out on different samples of typical commercial phenol-formaldehyde novolac resins. Six random novolac resins (NLO 1-6), with decreasing ratios ...
Glycidyl esters synthesis catalysed by ion-exchange resins
(Serbian Chemical Society, Belgrade, 1996)
Ion-exchange resins not previously used for this purpose were employed to study the synthesis of glycidyl esters. The reaction was carried out both with free acids and their sodium salts. The model reaction was the synthesis ...
Infrared study of N-H...π hydrogen bonding. N-methylbenzamide - Aromatic donor systems
(Serbian Chemical Society, Belgrade, 1996)
The present paper reports the results of an infrared study in the region of the fundamental NH stratching vibration for six N-methylbenzamide - aromatic donor systems. The thermodynamic properties for 1:1 NMBA - aromatic ...
Substituent effect on C=O stetching vibrations in N-substituted 2-phenylacetamides
(Serbian Chemical Society, Belgrade, 1997)
The infrared spectra have been recorded for the N-substituted 2-phenylacetamides. The effect of substitutents on the spectral characteristics of the C=O group was investigated. When the electron-releasing substitutents are ...
Benzylation of N-benzyl-2-phenylacetamide
(Serbian Chemical Society, Belgrade, 1999)
N-Benzyl-2-phenylacetamide was used as a model for the study of the alkylation of N-substituted 2-phenylacetamides with benzyl chloride in the presence of powdered KOH. The reactions were carried out in the presence and ...
Alkylation of N-ethyl-2-phenylacetamide with benzyl halides
(Serbian Chemical Society, Belgrade, 1996)
Alkylations of N-ethyl-2-phenylacetamide with benzyl halides (chloride, bromide and iodide) in the presence of powdered KOH were carried out in order to establish the possible reaction products as well as to ascertain ...
UTICAJ EKSPERIMENTALNIH USLOVA NA ODREĐIVANJE JEDNOCIKLIČNIH KARAKTERISTIKA PREĐA PRI ISTEZANJU / INFLUENCE OF EXPERIMENTAL CONDITIONS ON DETERMINATION OF ONE - CYCLIC YARN CHARACTERISTICS AT EXTENSION
(Savez inženjera i tehničara tekstilaca Srbije, 1999)
Ispitivane su jednociklične karakteristike pređa pri istezanju. Primenjen je postupak sa konstantnim opterećenjem u prvoj fazi ciklusa opterećenje - rasterećenje - odmor. Upoređivani su rezultati određivanja relaksacionih ...
Postupci pripreme vune za štampanje
(Savez hemijskih inženjera, Beograd, 1999)
METODE ZA NEUTRALIZACIJU STATIČKOG NAELEKTRISANJA NA TEKSTILNIM MATERIJALIMA / STATIC ELECTRICITY NEUTRALIZATION METHODS ON TEXTILE MATERIALS
(Savez hemičara i tehnologa Jugoslavije, 1999)
Dielektrična svojstva tekstilnh materijala uslovljavaju pojavu statičkog naelektrisanja pri njihovom kontaktu sa drugim telima. Statičko naelektrisanje često nepovoljno utiče na ponašanje tekstilnh materijala kako u ...
Sušenje penicilina-G u fluidizovanom sloju
(Yugoslav association of Chemical Engineering, 1997)