CRCU

Chemical Research in Chinese Universities ›› 2011, Vol. 27 ›› Issue (1): 140-144.

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Compatibilization of PBT/PP Blends by Adding Side-chain Liquid Crystalline Ionomer with Quaternary Pyridinium Groups

XU Xin-yu*   

  1. Department of Polymer Materials and Engineering, School of Chemistry and Materials Science, Liaoning Shihua University, Fushun 113001, P. R. China
  • Received:2010-07-29 Revised:2010-09-13 Online:2011-01-25 Published:2011-01-04
  • Contact: XU Xin-yu E-mail:xu_xinyu@hotmail.com
  • Supported by:

    Supported by the National Natural Science Foundation of China(No.50673105).

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Abstract: A side-chain liquid crystalline ionomer(SLCI) was synthesized by grafting copolymerization of 4-(4-ethoxybenzoyloxy)-4′-allyloxybiphenyl and N-allyl-pyridium bromide on polymethylhydrosiloxane. The SLCI was blended with polypropylene(PP) and polybutylene terephthalate(PBT) by melt mixing. The thermal behavior, liquid crystalline properties, morphological structure, and mechanical properties of the blends were investigated by differential scanning calorimetry(DSC), polarizing optical microscopy(POM), scanning electron microscopy(SEM), and tensile measurement. When a proper amount of SLCI was added, fine configurations were formed in the PBT/PP/SLCI blend system, and the mechanical properties were improved due to improved adhesion at the interface. When excess SLCI was added, an inhomogeneous structure resulted, which caused the mechanical properties to deteriorate.

Key words: Poly(butylent terephthalate), Poly(propylene), Liquid crystalline ionomer, Compatibilization