Macromolecular Research

The Polymer Society of Korea (한국고분자학회)
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Effect of the Processing History on the Morphology and Properties of the Ternary Blends of Nylon 6, a Thermotropic Liquid Crystalline Polymer, and a Functionalized Polypropylene

  • Yongsok Seo (Polymer Processing Laboratory, Korea Institute of Science and Technology(KIST)) ;
  • Kim, Hyong-Jun (Polymer Processing Laboratory, Korea Institute of Science and Technology(KIST)) ;
  • Kim, Byeongyeol (Polymer Processing Laboratory, Korea Institute of Science and Technology(KIST)) ;
  • Hong, Soon-Man (Polymer Processing Laboratory, Korea Institute of Science and Technology(KIST)) ;
  • Hwang, Seung-Sang (Polymer Processing Laboratory, Korea Institute of Science and Technology(KIST)) ;
  • Kim, Kwang-Ung (Polymer Processing Laboratory, Korea Institute of Science and Technology(KIST))
  • Published : 2001.08.01
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Abstract

Properties of ternary blends of nylon 6 (Ny6), a thermotropic liquid crystalline polymer (TLCP, poly(ester amide), 20 wt%) and a maleic anhydride grafted polypropylene (2 wt%) (MAPP) were studied under various processing conditions. TLCP was pre-blended with MAPP first and then the binary one blended again with Ny6. The processing temperature of the second mixing was varied. Thermal properties show the partial miscibility of the ternary blend. The morphology of the TLCP phase in the first blending shows mostly in the fibril bundle shape, but varies between droplets and oriented fibrils after the second processing. Some of TLCP phase lost the fibril morphology during the second processing stage. The morphology variation invokes the change in tensile properties. Low extrusion temperature (270$\^{C}$) provides more fibril shapes, which are associated with less deformation in the second stage. The processing temperature effect was more evident when the draw ratio was high. High drawing was applicable due to the stabilizing action of tile compatibilizer.

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