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Polymer Bulletin
Published in: Polymer Bulletin 5/2010

01-09-2010 | Original Paper

Rheological and mechanical properties of poly(lactic acid)/polystyrene polymer blend

Authors: Kotiba Hamad, Mosab Kaseem, Fawaz Deri

Published in: Polymer Bulletin | Issue 5/2010

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Abstract

Properties modification by blending polymers has been an area of immense interest. In this work, rheological and mechanical properties of poly(lactic acid)/polystyrene (PLA/PS) blends were investigated. PLA/PS blends in different ratios were prepared using a laboratory scale single screw extruder to obtain (3 mm) granules. Rheological properties were studied using a capillary rheometer and the Bagley’s correction was performed. True shear rate (γ r ), true shear stress (τ r ), and true viscosity (η r ) were determined, the relationship between true viscosity and (1/T) was studied for PLA70 blend and the flow activation energy at a constant shear stress (E τ ) and a constant shear rate (E γ ) was determined. The mechanical property measurements were performed at room temperature. Stress at break and strain at break were determined. The results showed that PLA/PS blend exhibited a typical shear-thinning behavior over the range of the studied shear rates, and the viscosity of the blend decreased with increasing PLA content. Also it was found that no equal-viscosity temperature exists between PLA and PS. The mechanical results showed immiscibility between PLA and PS in the blend.
previous article Effect of the presence of lignin or peat in IPN hydrogels on the sorption of heavy metals
next article Effect of end-group modification on the adsorption of poly(ethylene oxide)-b-poly(butylene oxide) diblock copolymers at the solid–liquid interface

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Metadata
Title
Rheological and mechanical properties of poly(lactic acid)/polystyrene polymer blend
Authors
Kotiba Hamad
Mosab Kaseem
Fawaz Deri
Publication date
01-09-2010
Publisher
Springer-Verlag
Published in
Polymer Bulletin / Issue 5/2010
Print ISSN: 0170-0839
Electronic ISSN: 1436-2449
DOI
https://doi.org/10.1007/s00289-010-0354-2

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