The rheological design of aliphatic polyketone terpolymer blends with polyester thermoplastic elastomer

The polyketone terpolymer of ethylene, propylene, and carbon monoxide (EPCO) was melt-mixed with a polyester thermoplastic elastomer (HY) in an internal mixer on rheological basis. The viscosity ratio as well as composition of two polymers had a significant effect on the morphology and mechanical pr...

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Bibliographic Details
Published in:Macromolecular research 2014, 22(11), , pp.1165-1169
Main Authors: Bae, Jeongsik, Kim, Byoung Chul
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Complex Fluids and Microfluidics
Nanochemistry
Nanotechnology
Physical Chemistry
Polymer Sciences
Soft and Granular Matter
고분자공학
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Summary:The polyketone terpolymer of ethylene, propylene, and carbon monoxide (EPCO) was melt-mixed with a polyester thermoplastic elastomer (HY) in an internal mixer on rheological basis. The viscosity ratio as well as composition of two polymers had a significant effect on the morphology and mechanical properties of EPCO/HY blends. EPCO exhibited shear-thinning behavior and HY showed Newtonian behavior at the melt mixing temperature. Up to the HY content of 20 wt%, the blend morphology followed the Taylor’s rule; as shear rate increased, the viscosities of two polymers merged and the size and its distribution of dispersed HY domains decreased. The EPCO blend with 20 wt% HY exhibited the highest notched Izod impact strength that was further increased as the mixing rate was increased. The impact strength of the blends, however, decreased abruptly and the mixing rate had little effect on the blend morphology if the HY content exceeded 30 wt%. Unlike notched Izod impact strength, the tensile properties and toughness of the blends decreased as the HY content increased.
ISSN:1598-5032
2092-7673
DOI:10.1007/s13233-014-2173-z