Abstract
AbstractThe experimental measurements necessary to characterize the crystallization kinetics of a semicrystalline polymer are established by adopting a model for the crystallization of the polymer and specifying the range in which thermodynamic variables and other field interactions with the polymer will be varied during processes of interest. The theory for a model of instantaneous heterogeneous nucleation followed by spherulitic growth is developed. To the extent to which this model accurately describes the crystallization, determination of the spherulitic growth rate and nucleation density as a function of temperature then characterizes the temperature‐dependent crystallization kinetics of a polymer. These have been measured for poly(butene‐1), and, with the adoption of a cooling of the polymer at a constant rate as a processing model, a useful description of the melt crystallization kinetics of poly(butene‐1) is given. Literature data for the crystallization rates of linear polyethylene and isotactic polypropylene, poly(butene‐1), and polystyrene and compared.
Published Version
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