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Mechanical, thermal, barrier, and rheological properties of poly(ether‐block‐amide) elastomer/organoclay nanocomposite prepared by melt blending
Author(s) -
Choi MyungChan,
Jung JiYoen,
Yeom HyunSik,
Chang YoungWook
Publication year - 2013
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.23348
Subject(s) - organoclay , materials science , nanocomposite , thermogravimetric analysis , differential scanning calorimetry , composite material , glass transition , elastomer , thermal stability , dynamic mechanical analysis , chemical engineering , polymer , physics , engineering , thermodynamics
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 ( T m ), glass transition temperature ( T g ), crystallization temperature ( T c ), and heat of fusion (Δ H m ) 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