TiO2-sensitised photo-oxidation mechanism of indane and some of its hetero-analogues in deaerated CH3CN

2006 ◽  
Vol 19 (6) ◽  
pp. 359-364 ◽  
Author(s):  
Marta Bettoni ◽  
Tiziana Del Giacco ◽  
Cesare Rol ◽  
Giovanni V. Sebastiani
Keyword(s):  
Oxidation Mechanism ◽  
Photo Oxidation

A reappraisal of the photo-oxidation mechanism at short and long wavelengths for poly(2,6-dimethyl-1,4-phenylene oxide)

Polymer ◽  
1996 ◽  
Vol 37 (6) ◽  
pp. 903-916 ◽  
Author(s):  
Marco Scoponi ◽  
Fiorella Pradella ◽  
Halina Kaczmarek ◽  
Rossano Amadelli ◽  
Vittorio Carassiti
Keyword(s):  
Oxidation Mechanism ◽  
Photo Oxidation ◽  
Phenylene Oxide

Photo-oxidation mechanism of l-alanine in TiO2 photocatalytic systems as studied by proton NMR spectroscopy

2007 ◽  
Vol 120 (2) ◽  
pp. 240-244 ◽  
Author(s):  
Masami Matsushita ◽  
Trung Huu Tran ◽  
Atsuko Y. Nosaka ◽  
Yoshio Nosaka
Keyword(s):  
Nmr Spectroscopy ◽  
Proton Nmr ◽  
Oxidation Mechanism ◽  
Proton Nmr Spectroscopy ◽  
Photo Oxidation

Photo-Oxidation of Polyethylene Composites with Different Interfacial Interactions

2005 ◽  
Vol 475-479 ◽  
pp. 1037-1040 ◽  
Author(s):  
Rui Yang ◽  
Jian Yu ◽  
Kun Hua Wang
Keyword(s):  
High Density Polyethylene ◽  
Oxidation Behavior ◽  
Oxidation Stability ◽  
Oxidation Mechanism ◽  
Coupling Agents ◽  
Interfacial Interactions ◽  
Photo Oxidation ◽  
Outdoor Application ◽  
Properties Of Composites ◽  
Polyethylene Composites

The photo-oxidation stability is crucial for the materials that are exposed to outdoor application. For polyethylene, it has been investigated thoroughly and the auto-oxidation mechanism has been widely accepted. Nevertheless, the photo-oxidation of polyethylene composites, the most widely used materials, has not attracted enough attention yet. It is well known that the mechanical properties of composites are of great difference to that of matrix polymers, due to the introduction of the fillers and the different interfacial interactions between the matrices and the fillers. Also the oxidation behavior of composites have interesting characteristics owing to the various fillers and interfacial interactions, which always depend on the coupling agents. In the present work, the natural photo-oxidation of high-density polyethylene composites was studied. The results showed that the coupling agent had the most important but different influence on the oxidation stability of the composites, according to the different fillers.

scholarly journals The determination of absolute rate constants in olefinic oxidations

1948 ◽  
Vol 195 (1042) ◽  
pp. 391-402 ◽  
Keyword(s):  
Wave Length ◽  
Oxidation Mechanism ◽  
Preceding Paper ◽  
Ethyl Linoleate ◽  
Similar Data ◽  
Absolute Rate ◽  
Intermittent Light ◽  
Photo Oxidation ◽  
Intense Light

On the basis of the reaction mechanism established in the preceding paper (this volume, p. 376), the changes in rate of photo-oxidation observed in intermittent light when a rate contribution is made by a simultaneous dark reaction have been rigorously analyzed. Using this analysis and the relevant experimental data, the velocity coefficients of the rate con­trolling propagation and termination reactions have been separately evaluated for cyclo hexene, 1-methyl cyclo hexene, dihydromyrcene and ethyl linoleate. The significance of the results in interpreting the finer details of the oxidation mechanism is discussed; and the numerical values are compared with similar data reported for polymerization systems. A criterion for detecting anomalous effects due to intense light absorption is derived; further to the evidence presented in the preceding paper, ethyl linoleate undergoing oxidation in light of wave-length 2537 Å is found to exemplify this behaviour.

A photo-oxidation mechanism for patterning and hologram formation in conjugated polymer/glass composites

2000 ◽  
Vol 88 (3) ◽  
pp. 1236-1243 ◽  
Author(s):  
Ofer Levi ◽  
Galina Perepelitsa ◽  
Dan Davidov ◽  
Shoshy Shalom ◽  
Iris Benjamin ◽  
...  
Keyword(s):  
Conjugated Polymer ◽  
Oxidation Mechanism ◽  
Glass Composites ◽  
Photo Oxidation ◽  
Polymer Glass

Photo-Oxidation of PVC-Coated Membrane Material

2013 ◽  
Vol 650 ◽  
pp. 238-244
Author(s):  
Xu Dong Yang ◽  
Yong Sheng Yan ◽  
Wen Can Qiu
Keyword(s):  
Uv Radiation ◽  
Oxidation Reaction ◽  
Reaction Rate ◽  
Oxidation Mechanism ◽  
Radiation Energy ◽  
Reaction Rates ◽  
Membrane Material ◽  
Photo Oxidation ◽  
Coated Membrane ◽  
Oxidation Reaction Rate

To study photo-oxidation behavior of PVC-coated membrane material under different UV radiation intensities, three intensities of Ultraviolet (UV) irradiation were carried out. The yellowness indexes under different weathering conditions were measured, as well as UV-Vis spectrometry. Result shows that the photo-oxidation mechanism doesn’t change under different UV intensities, but the photo-oxidation reaction rates are not equal when the cumulative UV radiation energy is same. A conclusion is obtained that photo-oxidation reaction rate under different intensities is out of proportion to UV intensity. And according to Schwarzschild’s law, an equation form is established to predict material’s life.

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