Influence of temperature, UV-light wavelength and intensity on polypropylene photothermal oxidation

被引：50
作者：
Francois-Heude, Alexandre [1 ,2 ]
Richaud, Emmanuel [1 ]
Desnoux, Eric [2 ]
Colin, Xavier [1 ]
机构：
[1] Arts & Metiers ParisTech, CNRS UMR 8006, PIMM Lab, Paris, France
[2] DETC A, Renault, Guyancourt, France
来源：
POLYMER DEGRADATION AND STABILITY | 2014年 / 100卷
关键词：
Polypropylene photodegradation; Lifetime prediction; Reciprocity law; Actinometry; Oxidation kinetics; CHAIN SCISSION MECHANISM; ULTRAVIOLET-RADIATION; PART II; PHOTOOXIDATION; PHOTODEGRADATION; DEGRADATION; FILMS; PHOTOLYSIS; POLYMERS; KINETICS;
D O I：
10.1016/j.polymdegradstab.2013.12.038
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
A criterion based on the energy absorbed by photosensitive species was proposed to describe the contribution of UV-light to the initiation of the polypropylene photothermal oxidation whatever the light source. The calculation of this energy was performed using the widely accepted quantum theory. The criterion was then introduced in two different types of analytical models commonly used to describe the combined effects of UV light and temperature on induction tithe, namely: the reciprocity law and kinetic model. The limitations of both types of analytical models were then investigated: the latter, derived from a realistic mechanistic scheme, was found to be much more relevant than the former, which is presumably valid in a restricted range of light intensities, essentially due to its empirical origin. (C) 2014 Elsevier Ltd. All rights reserved.
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收藏
页码：10 / 20
页数：11
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