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Observation of the concentric diffractive banding on the spherulites of poly(ethylene oxide) by a dynamic method
Author(s) -
Yang Hu,
Yin Weisi,
Zhang Xueqin,
Cai Zhengchun,
Wang Zhiliu,
Cheng Rongshi
Publication year - 2005
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.21714
Subject(s) - supercooling , ethylene oxide , materials science , crystallization , poly ethylene , oxide , optical microscope , diffraction , spherulite (polymer physics) , morphology (biology) , composite material , polymer chemistry , optics , chemical engineering , ethylene , scanning electron microscope , polymer , copolymer , thermodynamics , chemistry , physics , organic chemistry , catalysis , genetics , biology , metallurgy , engineering
The growth of poly(ethylene oxide) (PEO) spherulites was observed synchronously with a polarized optical microscope, which was equipped with a video detector, and so the whole growing process of the PEO spherulites was dynamically recorded as a movie. There was a series of concentric diffractive bands on the surface of the PEO spherulites; furthermore, the diffractive banding did not exist until at least two independent PEO spherulites came into contact with each other. However, the formation of the diffractive banding on the PEO spherulites was also related to the crystallization conditions. It was concluded qualitatively that the diffractive banding formed more easily at the crystallization temperature with a high degree of supercooling, and this was explained in kinetic terms. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 96: 2454–2458, 2005