Characteristics and Kinetics of Rosin Pentaerythritol Ester via Oxidation Process under Ultraviolet Irradiation
| Autor: | Fang Lai, Xiong-Min Liu, Yiming Xu, Chang Yu, Li Ma, Yuanlin Li, Qiang Zhang, Bo Wang, Haroon Ur Rashid |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Ultraviolet Rays
Kinetics Rosin Pharmaceutical Science Quantum yield 02 engineering and technology Activation energy 010402 general chemistry Photochemistry 01 natural sciences Peroxide Pentaerythritol Article Analytical Chemistry Chemical kinetics lcsh:QD241-441 chemistry.chemical_compound lcsh:Organic chemistry Drug Discovery medicine Physical and Theoretical Chemistry Organic Chemistry rosin pentaerythritol ester Esters Hydrogen Peroxide 021001 nanoscience & nanotechnology photo-oxidation 0104 chemical sciences UV Light intensity chemistry Propylene Glycols Chemistry (miscellaneous) kinetics Molecular Medicine sense organs 0210 nano-technology Oxidation-Reduction Resins Plant medicine.drug |
| Zdroj: | Molecules, Vol 23, Iss 11, p 2816 (2018) Molecules Volume 23 Issue 11 |
| ISSN: | 1420-3049 |
| Popis: | A self-designed reaction device was used as a promising equipment to investigate the oxidation characteristics and kinetics of rosin pentaerythritol ester (RPE) under UV irradiation. Photo-oxidation kinetics and the initial quantum yield (&Phi ) of RPE were calculated. The initial oxidation product of the photo-oxidation reaction&mdash peroxide was analyzed by iodimetry. The peroxide concentration is related to the light intensity (I) and the temperature (T), and the increasing T and I would destabilize the RPE by accelerating peroxide forming. Photo-oxidation of RPE follows the pseudo first-order reaction kinetics. The relationship between activation energy and logarithm of light intensity (ln I) is linear, and it is expressed as Ea = &minus 4.937ln I + 45.565. &Phi was calculated by the photo-oxidation kinetics, and the average value of &Phi was 7.19% in the light intensity range of 200&ndash 800 &mu W cm&minus 2. This research can provide fundamental information for application of RPE, and help obtain a better understanding of the stability of rosin esters. |
| Databáze: | OpenAIRE |
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