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Molecular weight dependent of the crystallization kinetics of poly(vinylidene fluoride)
Author(s) -
Roussel Sophie,
McElroy Kathy Lynn,
Judovits Lawrence H.
Publication year - 1992
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760321718
Subject(s) - materials science , fluoride , kinetics , crystallization , chemical engineering , polymer chemistry , composite material , inorganic chemistry , chemistry , physics , quantum mechanics , engineering
Samples of poly(vinylidene fluoride) with weight average molecular weights between 100,000 to 500,000 were analyzed using differential scanning calorimetry to study the influence of molecular weight on crystallization. Isothermal crystallization from the melt was investigated between 140 and 145°C. Crystallization rates were analyzed in terms of the Avrami equation. Avrami exponents between 3 and 11 were observed depending upon the microstructure, molecular weight, and cooling rate. The midrange molecular weight samples were found to crystallize slower than the high and low molecular weight materials.