Organic-inorganic hybrid from ionomer via sol-gel reaction

被引:74
作者
Gao, Y
Choudhury, NR [1 ]
Dutta, N
Matisons, J
Reading, M
Delmotte, L
机构
[1] Univ S Australia, Ian Wark Res Inst, Polymer Sci Grp, Mawson Lakes, SA 5095, Australia
[2] Loughborough Univ Technol, Inst Polymer Technol & Mat Engn, Loughborough LE11 3TU, Leics, England
[3] Ecole Natl Super Chim, F-68093 Mulhouse, France
关键词
D O I
10.1021/cm010179s
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
Transparent organic-inorganic hybrid material was synthesized via the sol-gel method using polyethylene-co-Zn-acrylic acid (Zn-PEAA) ionomer and a metal alkoxide, tetraethyl orthosilicate (TEOS). The resulting material was characterized using various spectroscopic, microscopic, and thermal techniques. Photoacoustic Fourier transform infrared spectroscopy (PA-FTIR) and Si-29 solid-state nuclear magnetic resonance spectroscopy (29Si solid-state NMR) results prove that silica is formed via the sol-gel reaction. Scanning electron microscopy with energy-dispersive X-ray analysis (SEM-EDAX), transmission electron microscopy (TEM), and atomic force microscopy (AFM) studies indicate that silica particle size is in nanoscopic level (50 nm average size), and silica nanoparticles are uniformly dispersed in the polymer matrix after the sol-gel process. Thermogravimetric analysis (TGA) results show that the silica content of the hybrid is about 19%. The thermal stability of the ionomer increases after hybridization. The crystallinity of the hybrid material is found to decrease from modulated differential scanning calorimetry (MDSC) and wide-angle X-ray scattering (WAYS) results. Dynamic mechanical analysis (DMA) of the hybrid shows that the storage modulus of ionomer increases after the sol-gel reaction, and the order-disorder transition temperature of the ionic cluster also increases, indicating the existence of silica mostly in the microphase separated cluster template.
引用
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页码:3644 / 3652
页数:9
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