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    • 61. 发明授权
    • Method and apparatus for degradation testing of stabilized polymers
    • 稳定聚合物降解试验方法和装置
    • US3868221A
    • 1975-02-25
    • US39359773
    • 1973-08-31
    • BELL TELEPHONE LABOR INC
    • HOWARD JOHN BENEDICTWESTOVER ROBERT FRANKLIN
    • G01N33/26G01N25/00G01N33/44
    • G01N33/26
    • Stabilized polymers are tested for resistance to exothermal degradation (e.g., oxidative degradation) at elevated temperatures. An apparatus is used in which several samples are simultaneously inserted into an oven which is maintained at the desired elevated temperature and maintained in the desired atmosphere. For each sample, measurement is made of the period between time of increase of the temperature of that sample, relative to the oven temperature, by a predetermined small temperature interval. It is considered that this temperature rise indicates the onset of accelerated exothermal degradation of that sample and that the time period is a measure of the effectiveness of the stabilizers in the polymer.
    • 在升高的温度下测试稳定的聚合物的耐放热降解(例如,氧化降解)。 使用一种装置,其中几个样品同时插入烘箱中,烘箱保持在所需的高温并保持在所需的气氛中。 对于每个样品,测量样品的温度相对于烘箱温度的升高时间之间的时间间隔预定的小温度间隔。 认为该温度升高表明该样品的加速放热降解的开始,并且时间段是聚合物中稳定剂的有效性的量度。