Process-Relevant Flow Characteristics of Styrene-Based Thermoplastic Elastomers and Their Representation by Rheometric Data
Abstract
:1. Introduction
2. Materials and Methods
- Length: L = 5, 10, 20, 30 mm/Diameter: D = 2 mm
- Length: L = 5, 10, 20, 30 mm/Diameter: D = 1 mm
- and are the shear and zero-shear viscosity,
- and are adjustable parameters, where is the critical shear stress at the transition to shear thinning and its power law index in the high shear rate region,
- and are the temperature and reference temperature,
- and are the fitted coefficients, respectively.
3. Results
3.1. Rheological Behavior at Small and Large Shear Strains
3.2. Effect of Capillary Diameter (D) on Rheometric Data
3.3. Effect of Capillary Length (L) on Rheometric Data
3.4. Experimental and Numerically Predicted Pressure Drops
3.5. Yield Behavior and Capillary Flow
4. Discussion
5. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Abbreviation | Application Field | Property Profile |
---|---|---|
TPS-1 | Seals, valves, closures, and flexible connections for consumer daily life | High elasticity, excellent adhesion to PP |
TPS-2 | Soft-touch components for consumer daily life | Good adhesion to PP |
TPS-3 | Seals and functional parts with contact to drinking water | Good adhesion to PP/PE |
WLF-Parameter | TPS-2 |
---|---|
3.8698 | |
483.15 K | |
187.7341 K |
According to | Yang, Youssry et al. [11,12] | Shih et al. [13] |
---|---|---|
Maximum in the plot of | Crossover point | |
Estimation procedure | versus | |
Effective yield stress [kPa] | ||
TPS-1 | 13.91 | 13.07 |
TPS-2 | 1.61 | 5.52 |
TPS-3 | - | - |
Cross-Parameter | TPS-1 | TPS-2 | TPS-3 |
---|---|---|---|
0.184 | 0.37 | 0.18 | |
2503.1724 | 650 | 1,750,000,000 | |
70,000,000 | 15,000 | 4200 |
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Kaempfe, M.; Fischer, M.; Kuehnert, I.; Wießner, S. Process-Relevant Flow Characteristics of Styrene-Based Thermoplastic Elastomers and Their Representation by Rheometric Data. Polymers 2023, 15, 3537. https://doi.org/10.3390/polym15173537
Kaempfe M, Fischer M, Kuehnert I, Wießner S. Process-Relevant Flow Characteristics of Styrene-Based Thermoplastic Elastomers and Their Representation by Rheometric Data. Polymers. 2023; 15(17):3537. https://doi.org/10.3390/polym15173537
Chicago/Turabian StyleKaempfe, Markus, Matthieu Fischer, Ines Kuehnert, and Sven Wießner. 2023. "Process-Relevant Flow Characteristics of Styrene-Based Thermoplastic Elastomers and Their Representation by Rheometric Data" Polymers 15, no. 17: 3537. https://doi.org/10.3390/polym15173537