Rheological Characterization and Interplay of Flow Behavior in Selected Polymers and Their Blends: Polylactic Acid, Polycarbonate, Acrylonitrile Butadiene Styrene, and Hybrid Blends, Investigated via Single-Screw Extruder and Capillary Rheometry.
This study presents a comprehensive analysis of the rheological properties of thermoplastic polymers (PLA, ABS, PC) and their hybrid blends (PLA/PC, PLA/ABS) using two experimental methodologies: an industrial single-screw extruder and capillary rheometry. Results demonstrate pseudoplastic behavior in all samples (flow indices n<1, n*<1), with viscosity decreasing as shear rate, temperature, and processing cycles increase in the extruder. A novel methodology was developed to calculate shear stress in the extruder—where direct measurement is unfeasible—by graphically comparing data with capillary rheometer curves, utilizing the Power Law model (τ=kγ^n).
The higher-viscosity component dominated blend rheology:
- PLA/PC blends exhibited PC-like behavior due to the predominance of polycarbonate in the continuous phase.
- PLA/ABS blends approached pure ABS flow characteristics resulting from the formation of an ABS continuous phase.
Both blends deviated significantly from neat PLA behavior owing to PLA’s lower viscosity and incompatibility.
Congruence in flow indices (n and n*) between instruments confirms the capillary rheometer’s reliability in simulating industrial extruder flow dynamics. This research bridges precise laboratory measurements with industrial polymer processing, enabling efficient design of hybrid polymer systems.
Al Jobarani, R., deri, F., & Alhamad, K. (2025). Rheological Characterization and Interplay of Flow Behavior in Selected Polymers and Their Blends: Polylactic Acid, Polycarbonate, Acrylonitrile Butadiene Styrene, and Hybrid Blends, Investigated via Single-Screw Extruder and Capillary Rheometry.. Egyptian Journal of Chemistry, (), -. doi: 10.21608/ejchem.2025.413437.12179
MLA
Rama Majed Al Jobarani; fawaz yazen deri; Khatoon Mohammed Alhamad. "Rheological Characterization and Interplay of Flow Behavior in Selected Polymers and Their Blends: Polylactic Acid, Polycarbonate, Acrylonitrile Butadiene Styrene, and Hybrid Blends, Investigated via Single-Screw Extruder and Capillary Rheometry.", Egyptian Journal of Chemistry, , , 2025, -. doi: 10.21608/ejchem.2025.413437.12179
HARVARD
Al Jobarani, R., deri, F., Alhamad, K. (2025). 'Rheological Characterization and Interplay of Flow Behavior in Selected Polymers and Their Blends: Polylactic Acid, Polycarbonate, Acrylonitrile Butadiene Styrene, and Hybrid Blends, Investigated via Single-Screw Extruder and Capillary Rheometry.', Egyptian Journal of Chemistry, (), pp. -. doi: 10.21608/ejchem.2025.413437.12179
VANCOUVER
Al Jobarani, R., deri, F., Alhamad, K. Rheological Characterization and Interplay of Flow Behavior in Selected Polymers and Their Blends: Polylactic Acid, Polycarbonate, Acrylonitrile Butadiene Styrene, and Hybrid Blends, Investigated via Single-Screw Extruder and Capillary Rheometry.. Egyptian Journal of Chemistry, 2025; (): -. doi: 10.21608/ejchem.2025.413437.12179
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