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Melt crystallization and segmental dynamics of poly(ethylene oxide) confined in a solid electrolyte composite
Author(s) -
Huang Yage,
Ma Mingchao,
Guo Yunlong
Publication year - 2020
Publication title -
journal of polymer science
Language(s) - English
Resource type - Journals
eISSN - 2642-4169
pISSN - 2642-4150
DOI - 10.1002/pol.20190095
Subject(s) - crystallinity , crystallization , differential scanning calorimetry , materials science , electrolyte , ethylene oxide , relaxation (psychology) , isothermal process , chemical engineering , dielectric , composite number , oxide , polymer chemistry , composite material , thermodynamics , chemistry , polymer , copolymer , psychology , social psychology , physics , optoelectronics , electrode , metallurgy , engineering
The isothermal melt crystallization and the corresponding segmental dynamics, of a high molecular weight poly(ethylene oxide) (PEO) confined by Li 7 La 3 Zr 2 O 12 (LLZO) particles in solid electrolyte composites, were monitored by differential scanning calorimetry (DSC) and dielectric relaxation spectroscopy (DRS), respectively. Our results show that the overall crystallinity is positively correlated with the surface area of LLZO particles. The primary and secondary crystallization processes are identified by a modified Avrami equation, while two dynamic modes, the α relaxation and α ′ relaxation, were in the DRS measurements. The results reveal an unambiguous correlation between the primary crystallization and the α relaxation, while a correlation between the second crystallization and the α ′ relaxation concurrently exist in the electrolyte composites. © 2020 Wiley Periodicals, Inc. J. Polym. Sci. 2020 , 58 , 466–477