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首页> 外文期刊>Spectrochimica acta, Part A. Molecular and biomolecular spectroscopy >FTIR spectra of plasticized grafted natural rubber-LiCF3SO3 electrolytes
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FTIR spectra of plasticized grafted natural rubber-LiCF3SO3 electrolytes

机译：增塑接枝天然橡胶-LiCF3SO3电解质的FTIR光谱

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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 v(s)(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 1447 cm(-1) is shifted to 1449 cm(-1) in the EC-polymer complex. The C=O 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 C=O bending band of EC from 718 cm(-1) being shifted to 720 cm(-1) in the complex. In Li+-EC interaction where the ring breathing region at 897 cm(-1) in EC has shifted to 899 cm(-1) in EC-salt spectrum. The band appearing at 1643-1645 cm(-1) due to the coordination of Li+ <- O-C is still under observation and new peaks at 1779 and 1809 cm(-1) are responsible to the carbonyl stretches of EC in plasticized salt-polymer electrolytes. (c) 2005 Elsevier B.V. All rights reserved.
机译：经常尝试对天然橡胶（NR）进行化学改性以改善特定应用中的性能。已经研究了将30％聚甲基丙烯酸甲酯（PMMA）接枝到NR（MG30）中作为聚合物电解质的潜在选择。用FTIR研究了盐和增塑剂在聚合物主体电解质中的络合作用。 MG30的羰基延伸量位于1729 cm（-1），并添加三甲磺酸锂（LiCF3SO3）盐，在1643-1645 cm（-1）的低频区域出现了新的谱带。盐电解质的v（s）（SO3）的非简并振动模式出现在1031-1034 cm（-1）处，来自“游离”三甲磺酸根阴离子，以及来自单齿离子和三氟甲磺酸盐的1040-1046 cm（-1）吸收。这些表明MG30-盐相互作用。当MG30和碳酸亚乙酯（EC）形成膜时，出现在1447 cm（-1）处的MG30的CH3不对称弯曲在EC-聚合物络合物中移动到1449 cm（-1）。在1729 cm（-1）处拉伸的C = O也移至1728 cm（-1）。因此，EC-MG30系统彼此复杂。 EC-LiCF3SO3相互作用通过复合体中EC的C = O弯曲带从718 cm（-1）移到720 cm（-1）的指示来指示。在Li + -EC相互作用中，EC中的897 cm（-1）处的环形呼吸区域在EC-盐光谱中已移至899 cm（-1）。由于Li + <-OC的配位，出现在1643-1645 cm（-1）处的谱带仍在观察中，并且1779和1809 cm（-1）处的新峰与增塑盐聚合物中EC的羰基伸展有关电解质。 （c）2005 Elsevier B.V.保留所有权利。

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