Effect of molecular weight on conformational changes of PEO: an infrared spectroscopic analysis

Yang, Shuyan; Liu, Zhimeng; Liu, Yuping; Jiao, Yuanqi

doi:10.1007/s10853-014-8714-1

Cited by 55 publications

(30 citation statements)

References 26 publications

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“…The semi-crystalline character of samples are affected by addition of Al 2 O 3 particles, that addition increase the amorphous phase in the new composite, producing changes in the intensity and broadening of the Raman peaks. Figure 3 shows the IR spectra for pure PEO, CF 3 COONa, the polymer electrolyte (PEO) 10 [29,36,37] (a in Figure 3) overlaps the lines at 508 and 529 cm -1 assigned to C-O-C stretching of in the principal chain of PEO [38,39]; however, for the highest Al 2 O 3 concentration the three peaks are clearly defined.…”

Section: Raman Spectroscopymentioning

confidence: 97%

Structural and vibrational studies on composites polymer electrolytes (PEO)10CF3COONa + x wt.% Al2O3

Delgado-Rosero

Jurado-Meneses

Meléndez‐Lira

2017

Rev. Fac. Ing. Univ. Antioquia

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ABSTRACT:Composites formed by combinations of polyethylene oxide (PEO) and sodium trifluoroacetate (CF 3 COONa) with different aluminum oxide (Al 2 O 3 ) concentrations were synthetized. Infrared (IR), Raman spectroscopy, X ray diffraction (XRD) and atomic force microscopy (AFM) analyses, were performed to characterize the composites. Changes on the XRD intensity peaks, and variations in intensity and position of some peaks in Raman and IR spectroscopy were observed for different concentrations of added Al 2 O 3 . The decrease in the XRD peaks of the PEO when it is combined with the salt, revealed that crystallinity in polymer was reduced, being lower when the alumina is added. The increase in roughness root medium square (R RMS ) observed by AFM when Al 2 O 3 was added, agree with reduction in crystallinity observed with XRD studies. Changes in the structure of PEO showed in the absorption lines IR and Raman, due to addition of CF 3 COONa salt and Al 2 O 3 filler, have been attributed to the interactions between the electrolyte and the filler. RESUMEN:Se sintetizaron compósitos formados entre polióxido de etileno (PEO) y trifluoroacetato de sodio (PEO 10 CF 3 COONa) con diferentes concentraciones de óxido de aluminio (Al 2 O 3 ). Los compósitos fueron caracterizados por espectroscopía infrarroja (IR), espectroscopía Raman, difracción de rayos X (XRD) y microscopía de fuerza atómica (AFM). Las combinaciones del electrolito sólido PEO 10 CF 3 COONa con diferentes concentraciones de Al 2 O 3 , mostraron cambios en la intensidad de los picos de XRD, así como cambios en la intensidad y posición de algunos picos de IR y Raman. El decrecimiento de los picos del PEO en XRD, cuando este fue combinado con la sal, reveló que la cristalinidad del polímero se redujo, siendo más baja cuando se le adicionó alúmina. Se observó un incremento en la raíz cuadrática media de la rugosidad (R RMS ) obtenida por microscopia de fuerza atómica cuando se adicionó Al 2 O 3. Este incremento está en concordancia con la reducción de la cristalinidad observada con estudios de XRD. Los cambios en la estructura del PEO mostrados en las líneas de absorción de IR y Raman, debidos a la adición de CF 3 COONa y Al 2 O 3 , fueron atribuidos a interacciones entre el electrolito y el relleno Al 2 O 3 .

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Section: Raman Spectroscopymentioning

confidence: 97%

Structural and vibrational studies on composites polymer electrolytes (PEO)10CF3COONa + x wt.% Al2O3

Delgado-Rosero

Jurado-Meneses

Meléndez‐Lira

2017

Rev. Fac. Ing. Univ. Antioquia

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“…For pure PEO, there are two peaks at 1360 and 1340 cm À1 , which are from wagging absorptions of -CH 2 -in the helical structure and the trans planar structure, respectively. 35 The appearance of these two -CH 2 -vibrations in PEO illustrates that crystalline structures are present.…”

Section: 34mentioning

confidence: 99%

Biocompatible and biodegradable solid polymer electrolytes for high voltage and high temperature lithium batteries

Lin

Cheng

et al. 2017

RSC Adv.

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Solid polymer electrolytes (SPEs) have significant potential to improve the energy density of lithium batteries and exhibit good flexibility, electrochemical stability and increased safety. In this study, a biocompatible and biodegradable SPE is prepared by using the natural product, wheat flour. The SPE is found to have an ionic conductivity of 2.62 Â 10 À5 S cm À1 at 25 C with a Li + ionic transference number of 0.51.

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“…The PEO band at 529 cm −1 due to CCO bending is conserved for the DEX/PEO 1:2 blend. Although this vibration is very weak for DEX/PEO ratios of 1:1 and 2:1, its frequency does not shift, indicating the conservation of PEO chain orientation and polar bonds for all blending ratios . Molecular interactions between dextrin and PEO, mainly hydrogen bonding, are evidenced by peak shifts and absences in specific regions of FTIR spectra.…”

Section: Resultsmentioning

confidence: 93%

Characterization of mechanically reinforced electrospun dextrin‐polyethylene oxide sub‐microfiber mats

Rodríguez‐Zamora

Peña‐Juárez

Cedillo‐Servín

et al. 2019

Polymer Engineering & Sci

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Dextrin and dextrin‐polyethylene oxide (DEX/PEO) fibers in the submicron range were produced by electrospinning of single and blend polymer solutions. The morphology, intermolecular interactions, and mechanical properties of dextrin microfibers with and without PEO were characterized by scanning electron microscopy, Fourier transform infrared spectroscopy, Raman spectroscopy, X‐ray diffraction, nuclear magnetic resonance spectroscopy, and uniaxial tensile testing. Spectroscopic results confirmed hydrogen bond formation, evidencing dextrin as a molecular entanglement source for fiber mechanical reinforcement. The uniaxial tensile tests demonstrated a synergistic mechanical reinforcement effect that varied with blend composition. Equal weight ratio blends supported a maximum tensile strength with a high elastic modulus and demonstrated to be more elastic and resistant to breaking, even than pristine PEO fibers. Moreover, elastic moduli of blend fiber mats were found to lie within the value range for human skin, thus providing the DEX/PEO meshes with potential applicability as skin tissue scaffolds. This synthesis approach proved the feasible and inexpensive fabrication process of natural‐synthetic polymer hybrid fibers that combine the biocompatibility, biodegradability, and encapsulating capability of dextrin with the mechanical strength and flexibility of PEO for the development of scaffolds for tissue engineering and topical drug delivery applications in skin wound healing. POLYM. ENG. SCI., 59:1778–1786, 2019. © 2019 Society of Plastics Engineers

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Effect of molecular weight on conformational changes of PEO: an infrared spectroscopic analysis

Cited by 55 publications

References 26 publications

Structural and vibrational studies on composites polymer electrolytes (PEO)10CF3COONa + x wt.% Al2O3

Structural and vibrational studies on composites polymer electrolytes (PEO)10CF3COONa + x wt.% Al2O3

Biocompatible and biodegradable solid polymer electrolytes for high voltage and high temperature lithium batteries

Characterization of mechanically reinforced electrospun dextrin‐polyethylene oxide sub‐microfiber mats

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