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- W2499164559 abstract "In this work, the expression long term requires defining. For photo-oxidation it refers to natural outdoor exposure up to 38 year duration and artificial accelerated weathering up to two years. In the case of thermal oxidation samples have been maintained at constant temperature for up to seven years. PHOTO-OXIDATION The materials examined in this study include both low density polyethylene (LDPE) and high density polyethylene (HDPE) protected by carbon black. These polyethylenes represent several different generations of polymers exposed at various times, the greater bulk of the samples having been exposed from 1946 through 1951. The very early work on the photo-oxidation of polyethylene was carried out in accelerated weathering machines and the compounds selected for outdoor exposure were generally based on the results obtained from accelerated weathering. In 1950 Wallder, et al. (1) established that 100 hours accelerated weathering was equivalent to one year of natural outdoor exposure for" @default.
- W2499164559 created "2016-08-23" @default.
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- W2499164559 date "1979-04-02" @default.
- W2499164559 modified "2023-09-25" @default.
- W2499164559 title "Long-Term Photo-and Thermal Oxidation of Polyethylene" @default.
- W2499164559 doi "https://doi.org/10.1021/bk-1979-0095.ch005" @default.
- W2499164559 hasPublicationYear "1979" @default.
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