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Unique morphologies found in freeze‐dried poly(ethylene oxide) prepared from dilute solutions
Author(s) -
Gu Fangming,
Bu Haishan,
Zhang Ze
Publication year - 1998
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/(sici)1521-3935(19981101)199:11<2597::aid-macp2597>3.0.co;2-z
Subject(s) - ethylene oxide , spherulite (polymer physics) , polymer chemistry , crystallization , copolymer , solvent , oxide , polymer , molecule , chemical engineering , benzene , sublimation (psychology) , crystallinity , materials science , poly ethylene , ethylene , chemistry , crystallography , organic chemistry , psychology , catalysis , psychotherapist , engineering
Abstract Freeze‐dried particles of poly(ethylene oxide) (PEO) were prepared from sublimation of a 1 × 10 −2 wt.‐% solution of PEO in benzene in an ice‐salt bath. After isothermal crystallization at 318.2 ± 0.1 K for 2 h, an unusual planar zigzag form of PEO was found. A variety of unique spherulite‐like morphologies were also observed, and their formation is discussed on the basis of the interaction between solvent molecules and segment of the polymer chains.