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- W2079306074 abstract "A mechanistically based kinetic model for the thermal degradation of polypropylene developed in the first paper of this series was used to define a ‘reduced time’ for the degradation. This reduced time is the product of a temperature-dependent rate constant and reaction time. Using hightemperature size-exclusion chromatography, experimental measurements of the molecular weight distribution (MWD) of thermally degraded polypropylene showed that MWDs were superimposable at identical reduced times except when reaction times were less than 2 min. This limitation was attributed to the ampoule experimental technique used. Degradation temperatures and reaction times extended from 250 °C and 14 days to 375 °C and 1 min. A Williams-Landel-Ferry (WLF) equation was fitted but much more data are required for establishing its validity." @default.
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- W2079306074 date "1997-08-01" @default.
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- W2079306074 title "The thermal degradation kinetics of polypropylene: Part II. Time-temperature superposition" @default.
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- W2079306074 doi "https://doi.org/10.1016/s0141-3910(96)00159-0" @default.
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