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Primary Nucleation in Polymer Crystallization
Author(s) -
Chen ErQiang,
Weng Xing,
Zhang Anqiu,
Mann Ian,
Harris Frank W.,
Cheng Stephen Z. D.,
Stein, Richard,
Hsiao Benjamin S.,
Yeh Fengji
Publication year - 2001
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 - 10.1002/1521-3927(20010501)22:8<611::aid-marc611>3.0.co;2-j
Subject(s) - small angle x ray scattering , crystallinity , nucleation , crystallization , materials science , isotropy , poly ethylene , crystallization of polymers , isothermal process , polymer , ethylene oxide , oxide , chemical physics , chemical engineering , thermodynamics , crystallography , scattering , composite material , ethylene , chemistry , optics , organic chemistry , physics , copolymer , metallurgy , engineering , catalysis
Isothermal crystallization of a low‐molecular‐weight poly(ethylene oxide) from both isotropic and structured melts at low undercoolings has been investigated via simultaneous measurements of small angle and wide angle X‐ray scatterings (SAXS and WAXS). An evolution of the SAXS pattern was observed prior to the appearance of crystallinity determined through WAXS. A possible interpretation of this experimental observation is provided through the nucleation concept: primary nuclei exist in the melt due to localized large‐amplitude density fluctuations in the isotropic medium.