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.
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.. EKB Journal Management System, (), -. doi: 10.21608/ejchem.2025.413437.12179
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.". EKB Journal Management System, , , 2025, -. doi: 10.21608/ejchem.2025.413437.12179
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.', EKB Journal Management System, (), pp. -. doi: 10.21608/ejchem.2025.413437.12179
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.. EKB Journal Management System, 2025; (): -. doi: 10.21608/ejchem.2025.413437.12179

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
Articles in Press, Accepted Manuscript, Available Online from 02 October 2025
Document Type: Original Article
DOI: 10.21608/ejchem.2025.413437.12179
Authors
Rama Majed Al Jobarani* 1; fawaz yazen deri2; Khatoon Mohammed Alhamad3
1Damascus University " Al-Baramkeh"
2Damascus University " Al-Baramkeh"
3Damascus University " Al-Baramkeh"
Abstract
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.
Keywords
Polymer blends; Shear stress modeling; Extrusion rheology; Capillary rheometer; Pseudoplastic behavior; Industrial optimization
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