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Concentric Ring Pattern Formation in a Competing Crystallization and Phase Separation Process
Author(s) -
Shi Weichao,
Cheng He,
Chen Fenghua,
Liang Yongri,
Xie Xuming,
Han Charles C.
Publication year - 2011
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.201100490
Subject(s) - crystallization , materials science , concentric , phase (matter) , amorphous solid , ring (chemistry) , chemical physics , process (computing) , crystallography , thermodynamics , chemistry , geometry , physics , computer science , mathematics , organic chemistry , operating system
Spherulitic patterns usually form in the single process of crystallization in polymer blends. But when phase separation intervenes under deep quench, the radial growth of the initial spherulitic patterns tends to invert into concentric alternating crystalline‐/amorphous‐rich ring structures. Within crystalline‐rich regions, lateral lamellae orient in the tangential direction rather than in the usual radial direction. We demonstrate the determining factor for this first observed phenomenon is the concentration deviation enhanced phase separation dynamics at the growth interface of crystals.