FTIR spectra of plasticized grafted natural rubber-LiCF3SO3 electrolytes

Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
K Kumutha, Y Alias

Abstract

Chemical modification of natural rubber (NR) has frequently been attempted to improve the performance in specific application. 30% poly(methyl metacrylate) (PMMA) grafted into NR (MG30) has been explored as a potential candidate for polymer electrolytes. The complexation effect of salt and plasticizer in polymer host electrolytes had been investigated using FTIR. The carbonyl stretch of MG30 locates at 1729 cm-1, with the addition of lithium trimethanesulfonate (LiCF3SO3) salt, new band evolves at lower frequency region at 1643-1645 cm-1. The nondegenerate vibrational mode of nus(SO3) of salted electrolytes appearing at 1031-1034 cm-1 comes from 'free' trimethanesulfonate anions and the 1040-1046 cm-1 absorption from the monodentate ion paired with triflates. These indicate MG30-salt interaction. When MG30 and ethylene carbonate (EC) formed film, the CH3 asymmetric bend of MG30 appearing at 1447cm-1 is shifted to 1449 cm-1 in the EC-polymer complex. The CO stretching at 1729 cm-1 also shifted to 1728 cm-1. Hence, the EC-MG30 system is complexed to each other. EC-LiCF3SO3 interactions are indicated by the shifting of CO bending band of EC from 718 cm-1 being shifted to 720 cm-1 in the complex. In Li+-EC interaction where the rin...Continue Reading

Citations

Mar 8, 2016·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·H J Woo, A K Arof
Feb 27, 2007·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·S GunasekaranA Kala
Jan 16, 2009·Macromolecular Rapid Communications·Courtney A PflugerDaniel D Burkey

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