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Journal of Polymer Science Part B: Polymer Physics, Vol.39, No.17, 2130-2139, 2001
Transcrystallization kinetics of poly(vinylidene fluoride)
We report the transcrystallinity of poly(vinylidene fluoride) on several different types of substrate materials. The supermolecular structure and its development were characterized with polarization microscopy, whereas differential scanning calorimetry was used for monitoring the isothermal and nonisothermal crystallization kinetics. Although only approximately applicable, an Avrami-Ozawa analysis of the latter yielded reliable exponents, which characterized the trans crystalline nucleation conditions, the related dimensionality of growth, and the resulting texture. The results complemented and agreed quantitatively with those of light microscopy. Several polymers, including poly(ethylene terephthalate), polytetrafluoroethylene, and polyimide, induced distinct trans crystallinity, but only a spherulitic supermolecular structure developed on glass and metallic substrates.
Keywords:transcrystallinity;substrate dependence;poly(vinylidene fluoride);Avrami-Ozawa analysis;thermodynamics;nucleation;light microscopy;supramolecular structures