کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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5203730 | 1381938 | 2008 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Characterization of oxidation progress by chemiluminescence: A study of polyethylene with pro-oxidant additives Characterization of oxidation progress by chemiluminescence: A study of polyethylene with pro-oxidant additives](/preview/png/5203730.png)
Non-isothermal chemiluminescence measurements in nitrogen and isothermal measurements in oxygen were used for the evaluation of degradation in pre-oxidized polyethylene either pure or containing Mn-based pro-oxidant additives. The results were compared with infrared spectroscopy data. Chemiluminescence measurements of pure polyethylene and polyethylene with additive made it possible to calculate the set of rate constants, based on the Bolland-Gee oxidation scheme. The oxidation rate constants of polyethylene with additive were significantly higher, while the activation energy of the process appeared lower (65Â kJÂ molâ1), than those of pure polyethylene. The method provides an access to study oxidation processes during the induction period of oxidation when infrared spectroscopy cannot provide sufficient information.
Journal: Polymer Degradation and Stability - Volume 93, Issue 8, August 2008, Pages 1515-1519