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August 14, 2026Journal of Polymer Engineering0 citations

Thermal, Rheological, and Mechanical Properties of 3D-Printed PLA/TPU Blends

Preparation of polylactic acid (PLA)/thermoplastic polyurethane (TPU) composite filaments for FDM 3D printing: thermal, rheological, and mechanical characterization

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Authors

YHYunyan HaoGWGuochen WangSCShanlong Che

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Overview

Experimental study demonstrates enhanced flexibility and toughness in 3D-printed PLA/TPU composites, indicating potential for high-performance impact-resistant components.

Key Points

  • Investigate the thermal, rheological, and mechanical properties of PLA/TPU composite filaments and determine optimal 3D printing parameters for honeycomb structures.
  • Fabricated PLA/TPU composite filaments containing 10–50 wt% TPU via melt blending and 3D-printed honeycomb test specimens using fused deposition modeling (FDM).
  • Evaluated thermal transitions, rheological behavior, tensile properties, and fracture morphology across composite ratios.
  • Optimized 3D printing parameters (nozzle temperature, printing speed, layer height, and infill density) for the 50/50 blend using an L9(3^4) orthogonal experimental design.
  • Incorporation of 50 wt% TPU increased toughness by 571.7% and elongation at break by 575.6%, with an accompanying reduction in tensile strength and PLA crystallization.
  • Addition of 20–30 wt% TPU reduced melt viscosity while maintaining melt elasticity, though overall melt flow rate decreased with higher TPU loading.
  • Optimal printing conditions for PLA/TPU (50/50) honeycomb structures were established at a 210 °C nozzle temperature, 60 mm/s printing speed, 0.25 mm layer height, and 75% infill density.

Cite This Study

Hao et al. (2026) studied this question.

synapsesocial.com/papers/6a7ee587b70b84ec8b9146d0https://doi.org/10.1515/polyeng-2026-0088
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