Zobrazeno 1 - 10
of 153
pro vyhledávání: '"F. Gugumus"'
Autor:
F. Gugumus
Publikováno v:
Polymer Degradation and Stability. 93:546-556
The thermolysis of polyethylene hydroperoxides is attributed to the reaction of two hydroperoxide groups. This bimolecular reaction appears as a first-order reaction with the mean values of the hydroperoxide concentrations that can be used for the ex
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c422354b7b8be3a84c05a586af58052a
https://doi.org/10.1016/j.polymdegradstab.2007.10.025
https://doi.org/10.1016/j.polymdegradstab.2007.10.025
Autor:
F. Gugumus
Publikováno v:
Polymer Degradation and Stability. 93:533-545
The experimental ratios of the main products from polyethylene hydroperoxide thermolysis are examined. Comparison with the corresponding theoretical ratios calculated for different hydroperoxide decomposition reactions allows discriminating between t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::261f9c1ff33d6fd1fbb43e798c6884cf
https://doi.org/10.1016/j.polymdegradstab.2007.09.012
https://doi.org/10.1016/j.polymdegradstab.2007.09.012
Autor:
F. Gugumus
Publikováno v:
Polymer Degradation and Stability. 93:520-532
The quantitative aspects of some specific decomposition reactions of polyethylene hydroperoxides are re-examined. New data have shown that β-scission of primary alkoxy radicals is negligible in the temperature range of the thermolysis experiments. T
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::903b77df7bd396113b64bee2df2b2742
https://doi.org/10.1016/j.polymdegradstab.2007.10.024
https://doi.org/10.1016/j.polymdegradstab.2007.10.024
Autor:
F. Gugumus
Publikováno v:
Polymer Degradation and Stability. 92:2121-2134
The experimental kinetics of decomposition of polyethylene hydroperoxides in the melt is re-examined. It is found that the rates determined are more accurate if only the “free” hydroperoxides are taken into account instead of the total hydroperox
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e34b234d6f6c5d781c85676027863a41
https://doi.org/10.1016/j.polymdegradstab.2007.07.017
https://doi.org/10.1016/j.polymdegradstab.2007.07.017
Autor:
F. Gugumus
Publikováno v:
Polymer Degradation and Stability. 92:684-702
The potential contribution of primary oxidation products to γ-lactone formation in polyethylene is discussed. The 1,4,6-hydroperoxy-keto-hydroperoxides and the 1,2,5-tris-hydroperoxides are investigated in this work. Their formation and decompositio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::167f70be948531c5333df862a4e2fd8c
https://doi.org/10.1016/j.polymdegradstab.2006.12.014
https://doi.org/10.1016/j.polymdegradstab.2006.12.014
Autor:
F. Gugumus
Publikováno v:
Polymer Degradation and Stability. 92:703-719
Oxidation of aldehydes and γ-hydroxy- trans -vinylene groups can yield γ-lactones. These intermediates account for γ-lactone formation in the advanced stages of polyethylene processing in air. The acyl-peroxy radical formed on free radical induced
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d36f88069713276acdbbcf0ca6edd87b
https://doi.org/10.1016/j.polymdegradstab.2006.12.013
https://doi.org/10.1016/j.polymdegradstab.2006.12.013
Autor:
F. Gugumus
Publikováno v:
Polymer Degradation and Stability. 92:125-142
The rate of acid formation at high temperature is constantly increasing but temperature independent. Two main mechanisms can account for this behavior in the advanced stages of polyethylene processing. The first mechanism is based on free radical ind
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1d8d4c47191af82c1bd79c359dfaca50
https://doi.org/10.1016/j.polymdegradstab.2006.07.028
https://doi.org/10.1016/j.polymdegradstab.2006.07.028
Autor:
F. Gugumus
Publikováno v:
Polymer Degradation and Stability. 92:158-175
There are only few mechanisms susceptible to explain γ-lactone formation at a constant rate. The formal kinetics based on these mechanisms proves to be a useful tool in the attempt to estimate the likeliness and possible relative amount of their con
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::04d3fc1a5e42d0513f6cbe1d73d3a6c0
https://doi.org/10.1016/j.polymdegradstab.2006.09.010
https://doi.org/10.1016/j.polymdegradstab.2006.09.010
Autor:
F. Gugumus
Publikováno v:
Polymer Degradation and Stability. 92:143-157
The experimental kinetics for γ-lactone formation shows more complexity than that for acids. Nonetheless, it can be concluded to the existence of a constant rate of formation from the beginning of the experiments with polyethylene melts. There is an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c7e61fb6661b25ab4227e103110416dc
https://doi.org/10.1016/j.polymdegradstab.2006.08.007
https://doi.org/10.1016/j.polymdegradstab.2006.08.007
Autor:
F. Gugumus
Publikováno v:
Polymer Degradation and Stability. 91:3416-3428
Aldehydes and acids can be formed in numerous reactions in oxidizing polyethylene melts. Significant amounts of aldehydes result from β-scission of alkoxy radicals that are formed on bimolecular hydroperoxide decomposition. There are also large amou
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c6989a412c16001e959c8737b4b9c3ac
https://doi.org/10.1016/j.polymdegradstab.2006.04.020
https://doi.org/10.1016/j.polymdegradstab.2006.04.020