Polynaphthoxazine-montmorillonite nanocomposites: Synthesis and characterization
Wang, CY; Zhao, T; Han, B; Ke, YC
AbstractA new class of phenolic-like thermosetting resins based on the ring-opening polymerization of naphthoxazine precursor exhibits some unique properties, including: no by-product releasing during curing reactions; near-zero shrinkage and excellent mechanical properties. Polynaphthoxazines-clay hybrid nanocomposites were prepared from I 5-dihydroxynaphthalene, aniline, formaldehyde and different proportion montmorillonite ( MMT) by in-situ reaction in ethanol. H-1-Nuclear Magnetic Resonance (H-1-NMR), X-ray Diffraction Analysis (XRD), Thermogravimetry (TGA) and Transmission Electron Microscopy (TEM) were applied to characterize the nanocomposites. H-1-NMR spectrum of naphthoxazine from the nanocomposites was identical to that of the pristine naphthoxazine, indicating the presence of MMT didn't change the chemical structure of the product. The spaces of silicate layers of montmorillonite in the composites were investigated by using X-ray diffractometer. It was found that exfoliation structure was formed after in-situ synthesis reaction and was remained after being cured. The TEM results suggested that an exfoliated poly-naphthoxazine-montmorillonite nanocomposite was successfully achieved. Dynamic TGA showed that only very small amount of clay is effective to improve the weight residues for nanocomposites. The char yield at 700degreesC increased by ca. 10% with 5 wt% MMT content in the nanocomposite and reached 65%. The confined crystallization behavior of the system was discussed.
KeywordNaphthoxazines Montmorillonite Nanocomposites
Indexed BySCI
WOS IDWOS:000175207200017
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Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorWang, CY
AffiliationChinese Acad Sci, Inst Chem, Ctr Mol Sci, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Wang, CY,Zhao, T,Han, B,et al. Polynaphthoxazine-montmorillonite nanocomposites: Synthesis and characterization[J]. ACTA POLYMERICA SINICA,2002(2):217-220.
APA Wang, CY,Zhao, T,Han, B,&Ke, YC.(2002).Polynaphthoxazine-montmorillonite nanocomposites: Synthesis and characterization.ACTA POLYMERICA SINICA(2),217-220.
MLA Wang, CY,et al."Polynaphthoxazine-montmorillonite nanocomposites: Synthesis and characterization".ACTA POLYMERICA SINICA .2(2002):217-220.
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