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Effects of predetermined nuclei and limited transformation on polymorphic crystallization in a model polymer
Author(s) -
MisztalFaraj Beata,
Ziabicki Andrzej
Publication year - 2012
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.36566
Subject(s) - crystallization , metastability , phase (matter) , polymer , materials science , amorphous solid , kinetics , polymorphism (computer science) , polymer chemistry , polypropylene , thermodynamics , chemical engineering , crystallography , polymer science , chemical physics , chemistry , physics , organic chemistry , composite material , biochemistry , quantum mechanics , gene , genotype , engineering
Formation of different polymorphic structures plays important role in crystallization of some polymers, like polypropylene, polycaproamide, poly(vinylidene difluoride), and others. Physical properties of such materials depend on phase structure, that is, fractions of different polymorphs. Basing on the model of many‐phase transitions (Ziabicki, J Chem Phys 2005, 123, 174103; Ziabicki and Misztal‐Faraj, J Mater Res, 2011, 26, 1585) a model system consisting of an amorphous phase, stable solid phase, and metastable polymorphic phase was analyzed. Two effects in the kinetics of polymorphic crystallization have been analyzed: effect of the presence of universal and/or selective predetermined nuclei and limited crystallizability resulting from molecular constraints in high‐molecular systems. Conditions in which different phase compositions (i.e., different proportions of individual phases) have been discussed. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012