Zobrazeno 1 - 10
of 17
pro vyhledávání: '"Uči Osredkar"'
Publikováno v:
Journal of Applied Polymer Science. 45:597-606
henolic and amino resins on the basis of α,β-unsaturated aldehydes were synthesized in bulk or solution. Catalysts were HCl, H 3 PO 4 , or formic acid, and in some cases NaOH. The course of the reactions is influenced by experimental conditions: th
Publikováno v:
Polymer. 31:130-134
The reactions between melamine and acrolein, crotonaldehyde or cinnamaldehyde were studied by 1-D and 2-D 1H and 13C n.m.r. spectroscopy. Regardless of the type of the unsaturated aldehyde used, all spectra of the resins have common characteristic re
Publikováno v:
Die Makromolekulare Chemie. 178:2197-2203
Course and kinetics of the isothermal bulk polymerization of diallyl fumarate and the course of the polymerization of diallyl fumarate, diallyl maleate, and diallyl succinate by programmed heating were studied. 2,2′-Azoisobutyronitrile was used as
Autor:
Anton Šebenik, Uči Osredkar
Publikováno v:
European Polymer Journal. 24:863-866
The structure of the products of reaction between urea and cinnamaldehyde in acid media was studied by HET2DJ 13C NMR, 1H NMR and GPC. Two main reactions take place: the addition of urea to the carbonyl group and to the double bond. Many different ol
Publikováno v:
Angewandte Makromolekulare Chemie. 131:203-212
The reactions of urea with acrolein in neutral and acidic media were studied by means of 1H- and 13C-NMR spectroscopy. The addition of aldehyde groups to urea seems to be the first step of the reaction. In the second step in neutral medium the groups
Publikováno v:
Angewandte Makromolekulare Chemie. 160:155-162
The mechanisms of the reaction between 4-ethylphenol and cinnamaldehyde were studied by means of HET 2DJ 13C-NMR spectroscopy, 1H-NMR spectroscopy and GPC. In the first step of the reaction the addition of 4-ethylphenol to carbonyl group and to doubl
Publikováno v:
Polymer Bulletin. :557-561
The reactions of o-, m-, p-cresol, 2,5- and 3,5-dimethylphenol with acrolein and crotonaldehyde were studied by means of cmr spectroscopy and GPC in acid and alkaline medium in the temperature range of 300 to 340K. The addition of phenols to double b
Publikováno v:
Angewandte Makromolekulare Chemie. 148:127-135
The mechanisms and kinetics of the reaction between resorcinol and cinnamaldehyde were studied by means of 13C-NMR spectroscopy, HPLC, and GPC. In the first step the addition of resorcinol to the double bond and to the carbonyl group of cinnamaldehyd
Publikováno v:
Journal of Macromolecular Science: Part A - Chemistry. 23:369-379
Kinetics and mechanism of formation of urethane, biuret, allo-phanate, and isocyanurate in the synthesis of polyurethanes were studied by means of 13C-NMR and GPC. In the spectra, the regions of urethane, allophanate, biuret, and isocyanurate were us
Publikováno v:
Journal of Macromolecular Science: Part A - Chemistry. 25:935-942
The structure, course of the reaction, and molecular weight distribution for resorcinol-crotonaldehyde resins were determined by HET2DJ 13C NMR, 1H NMR, and GPC. In the first step of the reaction, the free reactive Positions 4 and 6 of resorcinol rea