The deterioration of polypropylene by oxidative degradation
The deterioration of polypropylene by oxidative degradation
复制标题
聚丙烯的氧化降解变质
DOI：
10.1002/pen.760050312
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发表时间：
1965
影响因子：
3.2
通讯作者：
E. Turi
中科院分区：
文献类型：
--
作者：
H. J. Oswald;E. Turi
提出了一种解释，解释了吸收氧浓度极低时机械性能恶化的原因。通过氧吸收技术测量的诱导时间高估了机械性能方面的失效时间。此外，结果表明，在高温下获得的加速老化数据的外推不应在低于 50°C 的温度下进行。数据表明，抗氧化剂是抗紫外线辐射稳定剂系统的主要成分之一，因为涉及氧化降解机制。描述了一种改进的吸氧设备，该设备允许同时测定同一样品的吸氧量和机械性能的恶化。
An explanation is presented to account for the deterioration of the mechanical properties at very low concentrations of absorbed oxygen. The induction time as measured by the oxygen absorption technique overestimates the time to failure with respect to the mechanical properties. Furthermore, it is shown that the extrapolation of accelerated aging data as obtained at elevated temperatures should not be carried out below 50°C. Data are presented to show that an anti-oxidant is one of the major constituents of a stabilizer system against UV radiation, because the oxidative degradation mechanism is involved. A modified oxygen uptake equipment is described which allows the simultaneous determination of the oxygen absorption and the deterioration of the mechanical properties on the same sample.