Liquid-crystalline copolyester/clay nanocomposites

Authors

  • Guangli Zhang,

    Corresponding author
    1. Department of Polymer Science and Engineering, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, People's Republic of China
    • Department of Polymer Science and Engineering, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, People's Republic of China
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  • Cuihong Jiang,

    1. Department of Polymer Science and Engineering, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, People's Republic of China
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  • Chenyu Su,

    1. Department of Polymer Science and Engineering, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, People's Republic of China
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  • Hongzhi Zhang

    1. Department of Polymer Science and Engineering, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, People's Republic of China
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Abstract

A series of novel polymer–clay nanocomposites, that is, liquid-crystalline copolyester/montmorillonite (MMT) nanocomposites, were synthesized by the intercalation polycondensation of terephthalic acid, p-acetoxy benzoic acid, and 1,2-diacetoxy benzene in the presence of different organically modified montmorillonites (OMt's). The OMt's were prepared by the ion exchange of MMT with octadecylamine hydrochloride, p-aminobenzoic acid hydrochloride, or lysine hydrochloride. X-ray diffraction and transmission electron microscopy studies indicated that the inorganic cations in the MMT interlayers were already exchanged by organic onium ions and that the OMt intercalated with p-aminobenzoic acid or lysine was good for obtaining more delaminated clay nanocomposites. The glass-transition temperature and modulus of the nanocomposites increased compared with those of the pure polymer, whereas the isotropic temperature decreased. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 89: 3155–3159, 2003

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