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Mechanical, thermal, barrier, and rheological properties of poly(ether-block-amide) elastomer/organoclay nanocomposite prepared by melt blending

Authors

  • Myung-Chan Choi,

    1. Department of Bio-Nano Technology, College of Engineering Sciences, Hanyang University, Ansan, Gyeonggi 426-791, Republic of Korea
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  • Ji-Yoen Jung,

    1. Department of Bio-Nano Technology, College of Engineering Sciences, Hanyang University, Ansan, Gyeonggi 426-791, Republic of Korea
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  • Hyun-Sik Yeom,

    1. Department of Bio-Nano Technology, College of Engineering Sciences, Hanyang University, Ansan, Gyeonggi 426-791, Republic of Korea
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  • Young-Wook Chang

    Corresponding author
    1. Department of Bio-Nano Technology, College of Engineering Sciences, Hanyang University, Ansan, Gyeonggi 426-791, Republic of Korea
    2. Polymer Nano Materials Laboratory, Department of Chemical Engineering, College of Engineering Sciences, Hanyang University, Ansan, Gyeonggi 426-791, Republic of Korea
    • Department of Bio-Nano Technology, College of Engineering Sciences, Hanyang University, Ansan, Gyeonggi 426-791, Republic of Korea
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Abstract

Polyether block amide (PEBA) elastomer-organoclay nanocomposites were prepared by a melt mixing technique. The X-ray diffraction and transmission electron microscope analysis indicated that the nanocomposite formed a partially exfoliated nanostructure in which the organoclay was dispersed uniformly throughout the matrix at the nanometer scale. The effect of organoclay on the melting temperature (Tm), glass transition temperature (Tg), crystallization temperature (Tc), and heat of fusion (ΔHm) of the PEBA was determined by differential scanning calorimetry. Enhanced mechanical properties of the nanocomposites were observed from tensile and dynamic mechanical analysis. Thermal gravimetric analysis showed that the clay nanoparticles caused an increase in the thermal stability of the PEBA. Measurement of oxygen permeability and the degree of swelling in ASTM #3 oil indicated that the gas barrier properties and solvent resistance were greatly improved by the clay nanoparticles. Melt rheological studies revealed that the nanocomposites exhibited strong shear thinning behavior and a percolated network of the clay particles was formed. POLYM. ENG. SCI., 2013. © 2012 Society of Plastics Engineers

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