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Nature of the Ring‐Banded Spherulites in Blends of Aromatic Poly(ether ketone)s
Author(s) -
Chen Jian,
Yang Decai
Publication year - 2004
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.200400162
Subject(s) - peek , ether , materials science , ketone , optical microscope , ring (chemistry) , aryl , polarized light microscopy , composite material , spherulite (polymer physics) , polyether ether ketone , polymer chemistry , polymer , scanning electron microscope , chemistry , organic chemistry , optics , alkyl , physics
Summary: The ring‐banded spherulites in liquid crystalline poly(aryl ether ketone) (LC‐PAEK) and poly(aryl ether ether ketone) (PEEK) blends with a higher content (>50%) of LC‐PAEK are investigated by polarizing light microscopy (PLM) and atomic force microscopy (AFM) techniques. The results indicate that the light core and rings of the ring‐banded spherulites under PLM are mainly composed of an LC‐PAEK phase, while the dark rings consist of coexisting phases of PEEK and a small amount of LC‐PAEK. The formation of the ring‐banded spherulites is attributable to structural discontinuity caused by a rhythmic radial growth.PLM image of ring‐banded spherulites in a 70:30 LC‐PAEK/PEEK blend caused by rhythmic growth.