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Primary nucleation in polymer crystallization
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DOI：10.1002/1521-3927(20010501)22:8<611::AID-MARC611>3.0.CO;2-J.png)
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摘要
En 中文
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 fluctuation sin the isotropic medium.
Keyword:
POLY(ETHYLENE OXIDE) FRACTIONS
THINNING PROCESSES
CONFIGURATIONAL DEFECTS
DENSITY-FLUCTUATIONS
CRYSTAL NUCLEATION
PHASE-TRANSITIONS
INDUCTION PERIOD
MELT
POLY(ETHYLENE-TEREPHTHALATE)
POLYPROPYLENE
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