CRCU

Chemical Research in Chinese Universities ›› 2000, Vol. 16 ›› Issue (4): 356-362.

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Miscibility of Semi-flexible Thermotropic Liquid Crystalline Copolyesteramide with Polyamide 66

XIE Xiao-Lin1, TJONG S. C.2, LI R. K. Y.2   

  1. 1. Department of Chemistry, Huazhong University of Science and Technology, Wuhan 430074;
    2. Department of Physics and Materials Science, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong P. R. China
  • Received:1999-07-09 Online:2000-12-24 Published:2011-09-09
  • Supported by:

    Supported by the National Natural Science Foundation of China.

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Abstract: Liquid crystalline polymer-polyamide 66 (LCP/PA66) blends were compounded by using a Brabender mixing followed by compression moulding.The LCPemployed was a semi-flexible liquid crystalline copolyesteramide based on 30% (molar fraction ) of p-amino benzoic acid (ABA ) and 70% (molar fraction) of poly (ethylene terephthalate) (PET).The LCP/PA66 blends were investigated in terms of the thermal and dynamic mechanical properties.It was found that PA66 and LCPcomponents of the blends are miscible in the molten state, but are partially miscible in the solid state.The inclusion of the semi-flexible LCPinto PA66 retards the crystallization rate of PA66.Furthermore, the melting temperature and the degree of crystallinity of PA66 are reduced considerably due to the LCP addition.

Key words: Polyamide 66, Semi-flexible copolyesteramide, Miscibility