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Novel polyacrylonitrile/Na-MMT/silica nanocomposite: Co-incorporation of two different form nano materials into polymer matrix

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Title: Novel polyacrylonitrile/Na-MMT/silica nanocomposite: Co-incorporation of two different form nano materials into polymer matrix
Authors: Yu, Tianshi1, Lin, Jiaping jplinlab@online.sh.cn, Xu, Jiafu1, Chen, Tao1, Lin, Shaoliang1, Tian, Xiaohui1
Source: Composites Science & Technology. Dec2007, Vol. 67 Issue 15/16, p3219-3225. 7p.
Subjects: Polymers, Polymerization, Silicon compounds, Polymeric composites
Abstract: Abstract: Polyacrylonitrile (PAN)/Na-montmorillonite (Na-MMT)/SiO2 nanocomposites were synthesized via in-situ emulsion polymerization. The X-ray diffraction (XRD) measurements and transmission electron microscopy (TEM) observations show that the Na-MMT layers were exfoliated in polymerization and the nano materials are well dispersed in the polymer matrix. The thermogravimetric analysis (TGA) suggests that co-incorporating Na-MMT and SiO2 into the polymer matrix significantly enhances the thermal stability of the polymer. At same nano material loading, the PAN/Na-MMT/SiO2 nanocomposites show superior thermal stability with respect to the PAN/Na-MMT and PAN/SiO2 nanocomposites. The mechanical properties of the nanocomposites were also examined. It was found that the PAN/Na-MMT/SiO2 nanocomposites exhibit considerably enhanced moduli compared with the PAN/Na-MMT and PAN/SiO2 nanocomposites due to the synergistic reinforcing effect. [Copyright &y& Elsevier]
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Database: Engineering Source
Description
Abstract:Abstract: Polyacrylonitrile (PAN)/Na-montmorillonite (Na-MMT)/SiO2 nanocomposites were synthesized via in-situ emulsion polymerization. The X-ray diffraction (XRD) measurements and transmission electron microscopy (TEM) observations show that the Na-MMT layers were exfoliated in polymerization and the nano materials are well dispersed in the polymer matrix. The thermogravimetric analysis (TGA) suggests that co-incorporating Na-MMT and SiO2 into the polymer matrix significantly enhances the thermal stability of the polymer. At same nano material loading, the PAN/Na-MMT/SiO2 nanocomposites show superior thermal stability with respect to the PAN/Na-MMT and PAN/SiO2 nanocomposites. The mechanical properties of the nanocomposites were also examined. It was found that the PAN/Na-MMT/SiO2 nanocomposites exhibit considerably enhanced moduli compared with the PAN/Na-MMT and PAN/SiO2 nanocomposites due to the synergistic reinforcing effect. [Copyright &y& Elsevier]
ISSN:02663538
DOI:10.1016/j.compscitech.2007.04.004