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Studying a Flexible Polyurethane Elastomer with Improved Impact-Resistant Performance.

Jitang Fan1, Ang Chen2

  • 1State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China. Jitang_fan@hotmail.com.

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|April 10, 2019
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Summary
This summary is machine-generated.

This study reveals that flexible polyurethane elastomers exhibit enhanced impact resistance due to unique deformation mechanisms. These materials demonstrate excellent energy absorption for advanced protective applications.

Keywords:
energy absorptionimpact-resistant performanceplastic zonepolyurethane elastomerstrain rate

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Area of Science:

  • Materials Science
  • Polymer Science
  • Mechanical Engineering

Background:

  • Flexible polyurethane elastomers (PUE) are versatile materials.
  • Improving impact resistance is crucial for protective applications.
  • Understanding PUE behavior under dynamic loading is essential.

Purpose of the Study:

  • To investigate the impact-resistant performance of a flexible polyurethane elastomer (PUE).
  • To analyze the mechanical behavior of PUE under a wide range of loading rates.
  • To elucidate the deformation mechanisms responsible for enhanced energy absorption.

Main Methods:

  • Compressive stress-strain testing across a broad spectrum of loading rates.
  • Microscopic analysis to observe deformation patterns and structural features.
  • Comparison of mechanical data with existing polyurethane elastomer (PUE) and polyurea (PUA) literature.

Main Results:

  • PUE exhibits rubbery, hyperelastic characteristics under static loading, with 60% strain recovery.
  • Under high-rate loading, orderly parallel deformation bands and inter-band fibrils form.
  • A significant plastic zone with crazes and microcracks facilitates dynamic strain energy absorption.

Conclusions:

  • The studied PUE demonstrates superior impact resistance through unique deformation mechanisms.
  • The material's ability to form deformation bands and microcracks enhances energy absorption.
  • This research offers innovation for developing high-performance impact-resistant PUE for transparent protection.