Novel Nafion ORMOSIL hybrids via in situ sol-gel reactions .1. Probe of ORMOSIL phase nanostructures by infrared spectroscopy

被引：92

作者：

Deng, Q ^{[1
]}

Moore, RB ^{[1
]}

Mauritz, KA ^{[1
]}

机构：

[1] UNIV SO MISSISSIPPI,DEPT POLYMER SCI,HATTIESBURG,MS 39406

来源：

CHEMISTRY OF MATERIALS | 1995年 / 7卷 / 12期

关键词：

D O I：

10.1021/cm00060a012

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Novel [polymer]/[organically modified silicon oxide (ORIMOSIL)] hybrids were formulated via sol-gel reactions of mixtures of tetraethoxysilane (TEOS) and diethoxydimethylsilane (DEDMS) in the nanophase-separated morphology of perfluorosulfonic acid (PFSA) films. Molecular structures of ORMOSIL phases were investigated by FT-IR spectroscopy and the spectra compared with those of corresponding bulk ORMOSILs. Spectra are similar for PFSA in situ and bulk ORMOSILs, suggesting that short-range molecular structures in the two states are in fact comparable. Spectral trends with ORMOSIL composition suggest that similar D, Q sequence distributions exist for the two systems. There is evidence of co-condensation between Q and D units within the PFSA, as well as in the bulk ORMOSILs. As DEDMS:TEOS increases, ORMOSIL structures in both in situ and bulk states are increasingly more linear. It appears that a spectrum of energetic environment, or polarity, in the clusters of perfluorosulfonate ionomers can be tailored by adjusting the ratio of Si-OH and Si-CH3 groups in ORMOSIL nanophases.

引用

页码：2259 / 2268

页数：10

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