ATR-FTIR studies on ion interaction of lithium perchlorate in polyacrylate/poly(ethylene oxide) blends

Sim, Lai Har; Gan, Seng Neon; Chan, Chin Han; Yahya, Rosiyah

doi:10.1016/j.saa.2009.09.031

Cited by 136 publications

(103 citation statements)

References 33 publications

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“…The main absorption bands of LiClO 4 , DEG-1, and PEPA with relevant groups are presented in Table 1. These absorption bands were interpreted in accordance with [23–25], respectively.…”

Section: Resultssupporting

confidence: 78%

“…It is known that this can be associated with the formation of coordination bonds between Li + cations and ClO 4 − anions and polymer chains [26, 27]. It is generally accepted that Li + cations can easily form complexes with polyethylene ether bonds [23, 24, 27–30] as well as with polyamines [31]. The absorption band at 1637 cm −1 in the IR spectrum of LiClO 4 indicates its undissociated state (Table 1) [23, 24].…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Structural Peculiarities of Ion-Conductive Organic-Inorganic Polymer Composites Based on Aliphatic Epoxy Resin and Salt of Lithium Perchlorate

et al. 2017

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The article is concerned with hybrid amorphous polymers synthesized basing on epoxy oligomer of diglycide aliphatic ester of polyethylene glycol that was cured by polyethylene polyamine and lithium perchlorate salt. Structural peculiarities of organic-inorganic polymer composites were studied by differential scanning calorimetry, wide-angle X-ray spectra, infrared spectroscopic, scanning electron microscopy, elemental analysis, and transmission and reflective optical microscopy. On the one hand, the results showed that the introduction of LiClO4 salt into epoxy polymer leads to formation of the coordinative metal-polymer complexes of donor-acceptor type between central Li+ ion and ligand. On the other hand, the appearance of amorphous microinclusions, probably of inorganic nature, was also found.

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“…The main absorption bands of LiClO 4 , DEG-1, and PEPA with relevant groups are presented in Table 1. These absorption bands were interpreted in accordance with [23–25], respectively.…”

Section: Resultssupporting

confidence: 78%

Section: Resultsmentioning

confidence: 99%

Structural Peculiarities of Ion-Conductive Organic-Inorganic Polymer Composites Based on Aliphatic Epoxy Resin and Salt of Lithium Perchlorate

et al. 2017

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“…Hence, not only homopolymers have been used as polymer host, but also polymer blends, [8][9][13][14] block copolymers, [15] polymer composites [16] etc. in an effort to enhance the conductivity of SPEs.…”

Section: à4mentioning

confidence: 99%

“…Immiscible binary PEO-based blends which show enhanced conductivity are reported in some studies. [8,[12][13][17][18][19][20] Meanwhile, immiscible PEO-based blend SPEs, which show acceptable conductivity, often suffer from poor mechanical properties attributed to the poor interfacial adhesion between the two blending components. In view of the shortcomings of immiscible blends, miscible PEO-based blends (semicrystalline/amorphous) may be a good candidate as the polymer host of SPEs, where the crystallinity of PEO may be suppressed to a great extend with the addition of the amorphous polymer.…”

Section: à4mentioning

confidence: 99%

On Thermal and Spectroscopic Studies of Poly(ethylene oxide)/Poly(methyl methacrylate) Blends with Lithium Perchlorate

Karim

Sim

Chan

et al. 2015

Macromolecular Symposia

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Summary: In this study, thermal properties and ion-polymer interactions of lithium perchlorate (LiClO 4 ) in poly(ethylene oxide)/poly(methyl methacrylate) (PEO/PMMA) blend prepared by solution casting technique were elucidated. The spectroscopic studies of the salt-free and salt-doped PEO/PMMA blends were investigated using x-ray diffraction (XRD) and Fourier transform infra-red (FTIR), respectively. XRD study reveals that the crystalline structure of PEO is slight change when PMMA is blended to PEO. The thermal behaviour of PEO, PMMA and their blends with and without LiClO 4 was investigated by differential scanning calorimetry (DSC). The presence of a single and composition dependent glass transition temperature (T g ) reflects the miscibility of the salt-free PEO/PMMA blends in the molten state. The T g s of PEO, PMMA and the blends generally increase with ascending mass fraction of salt (W S ). However, PEO/PMMA 50/50 blend with W S ! 0.091 shows phase separation between the two polymers. The melting temperature (T m ) and crystallinity (X Ã ) of PEO are suppressed when blended with PMMA, thus, confirm the miscibility of the salt-free PEO/PMMA blends in the molten state. Presence of LiClO 4 to PEO, PMMA and their blends does not influences the X Ã of PEO. Investigation by FTIR does not show any specific interaction between PEO and PMMA for the salt-free blends whereas for the salt-doped blends, Li þ ions are observed to coordinate with the oxygen atom of both the PEO ether and the PMMA carboxyl groups. Impedance spectroscopy study demonstrates that the LiClO 4 -doped PEO/PMMA 75/25 blend has lower ion conductivity than that of the PEO þ LiClO 4 system but recorded enhanced conductivity as compared to PMMA þ LiClO 4 systems at W S ¼ 0.091.

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“…In this context, polyethylene oxide (PEO), a semicrystalline polymer, possessing both amorphous and crystalline phases at room temperature, is one of the extensively studied polymeric ionic conductors due to its capability to solvate elevated concentrations of salts through ion-dipole interactions occurring between metal ions incorporated and ether oxygen atoms existing within the polymeric network structure [7]. Though polyethylene oxide (PEO)-based polymer electrolytes exhibit ionic conduction, they do not yield high ionic conductivity values at ambient conditions due to the retardation of ionic transport imposed mainly by the existence of a highly crystalline phase [8].…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of a new PEO-PPG blend polymer electrolyte system

Nancy

Suthanthiraraj

2016

Ionics

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This paper reports on preparation and characterization of thin films of a new zinc ion conducting blended polymer electrolyte system containing polyethylene oxide [PEO] and polypropylene glycol [PPG] complexed with zinc triflate [Zn(CF 3 SO 3 ) 2 ] salt. The room temperature ionic conductivity (σ 298K ) data of such PEO-PPG polymer blends prepared by solution casting technique were found to be of the order of 10 −5 S cm −1 , whereas the optimized composition containing 90:10 wt% ratio of PEO and PPG possessed an appreciably high ionic conductivity of 7.5 × 10 −5 S cm −1 . Subsequently, six different weight percentages of zinc triflate viz., 2.5, 5, 7.5, 10, 12.5 and 15, respectively, were added into the above polymer blend and resulting polymer-salt complexes were characterized by means of various analytical tools. Interestingly, the best conducting specimen namely 87.5 wt% (PEO:PPG)-12.5 wt% Zn(CF 3 SO 3 ) 2 exhibited an enhanced room temperature ionic conductivity of 6.9 × 10 −4 S cm −1 with an activation energy of 0.6 eV for ionic conduction. The present XRD results have indicated the occurrence of characteristic PEO peaks and effects of salt concentration on the observed intensity of these diffraction peaks. Appropriate values of degree of crystallinity for different samples were derived from both XRD and DSC analyses, while an examination of surface morphology of the blended polymer electrolyte system has revealed the formation of homogenous spherulites involving a rough surface and relevant zinc ionic transport number was found to be 0.59 at room temperature for the best conducting polymer electrolyte system thus developed.

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ATR-FTIR studies on ion interaction of lithium perchlorate in polyacrylate/poly(ethylene oxide) blends

Cited by 136 publications

References 33 publications

Structural Peculiarities of Ion-Conductive Organic-Inorganic Polymer Composites Based on Aliphatic Epoxy Resin and Salt of Lithium Perchlorate

Structural Peculiarities of Ion-Conductive Organic-Inorganic Polymer Composites Based on Aliphatic Epoxy Resin and Salt of Lithium Perchlorate

On Thermal and Spectroscopic Studies of Poly(ethylene oxide)/Poly(methyl methacrylate) Blends with Lithium Perchlorate

Preparation and characterization of a new PEO-PPG blend polymer electrolyte system

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