Thermal, Thermomechanical, and Electrochemical Characterization of the Organic-Inorganic Hybrids Poly(ethylene oxide)(PEO)-Silica and PEO-Silica-LiClO4
- Title
- Thermal, Thermomechanical, and Electrochemical Characterization of the Organic-Inorganic Hybrids Poly(ethylene oxide)(PEO)-Silica and PEO-Silica-LiClO4
- Author
- 노시태
- Keywords
- organic-inorganic hybrid; poly(ethylene oxide); glass transition temperature; dynamic mechanical properties; ionic conductivity
- Issue Date
- 2001-06
- Publisher
- John Wiley & Sons, Inc
- Citation
- Journal of Applied Polymer Science, v. 81, issue. 10, page. 2471-2479
- Abstract
- To study the effect of silica content on the properties of the salt-free and salt-added
hybrids based on poly(ethylene oxide)(PEO) and silica, two series of hybrids,
PEO-silica and PEO-silica-LiClO4(O:Li, 9:1) hybrids were prepared via the in situ
acid-catalyzed sol-gel reactions of the precursors [i.e., PEO functionalized with
triethoxysilane and tetraethyl orthosilicate(TEOS)]. The morphology of the hybrids was
examined by scanning electron microscopy(SEM) of the fracture surfaces of the hybrid.
The results indicated that the discontinuity develops with increasing the weight percent
of silica in both hybrids. The differential scanning calorimetric (DSC) analysis indicated
that effects of silica content on the glass transition temperature (Tg) of the PEO phase
were different in salt-free and salt-added hybrids. The Tg of PEO phase increased
with increasing weight percent of silica in salt-free hybrids, whereas the curve of Tg
of PEO phase and silica content had a maximum at 35wt% of silica content in
salt-added hybrids. For both salt-free and salt-added hybrids, peaks of the loss
tangent, determined by dynamic mechanical analysis(DMA) were gradually broadened
and lowered with increasing weight percent of silica. The storage modulus, E', in the
region above Tg increases with increasing silica content for both PEO-silica and
PEO-silica-LiClO4 hybrids. IN the conductivity shows a maximum value of 3.7
×10-6S/cm, corresponding to the sample with a 35wt% of silica.
- URI
- https://onlinelibrary.wiley.com/doi/full/10.1002/app.1689https://repository.hanyang.ac.kr/handle/20.500.11754/158323
- ISSN
- 0021-8995; 1097-4628
- DOI
- 10.1002/app.1689
- Appears in Collections:
- COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MATERIALS SCIENCE AND CHEMICAL ENGINEERING(재료화학공학과) > Articles
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