Investigation of Viscoelastic Properties and Flow Modeling of Low-Molecular-Weight Polyethylene

This study investigates the viscoelastic properties and flow behavior of low-molecular-weight polyethylene (LMWPE) using rheological analysis and flow modeling. Frequency sweep measurements were used to evaluate the storage modulus (G′) and loss modulus (G″) over a frequency range of 0.1–20 Hz. The results showed that the storage modulus increased from 120 to 520 Pa, while the loss modulus increased from 450 to 890 Pa. Rheological modeling indicated a flow behavior index of 0.95, a consistency index of 11.8 Pa·sⁿ, a relaxation time of 0.42 s, and an activation energy of 28.5 kJ/mol. The findings characterize the flow and viscoelastic behavior of LMWPE and provide information relevant to its processing and potential industrial applications.

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