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Polymers 2019, 11(3), 467;

Studying a Flexible Polyurethane Elastomer with Improved Impact-Resistant Performance

State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China
Author to whom correspondence should be addressed.
Received: 17 February 2019 / Revised: 25 February 2019 / Accepted: 28 February 2019 / Published: 12 March 2019
(This article belongs to the Special Issue Advanced Engineering Plastics)
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A flexible polyurethane elastomer (PUE) is studied, and the improved impact-resistant performance is revealed. Compressive stress–strain curves over a wide loading rate range were derived. Under static loading, the rubbery-like characteristics are demonstrated, which are flexible and hyperelastic, to process a large strain of about 60% followed by full recovery upon unloading. Under high-rate loadingcompared with the mechanical data of polyurethane elastomer (PUE) and polyurea (PUA) materials in the literature. Orderly parallel deformation bands were formed from carrying a large strain. The fibrils were found between deformation bands for enhancing the yield/plateau stress. A considerable plastic zone ahead of propagating crack with numerous crazes and microcracks was produced for realizing the dynamic strain energy absorption. This work presents a scientific innovation for developing outstanding impact-resistant polyurethane elastomers for transparent protection engineering. View Full-Text
Keywords: polyurethane elastomer; strain rate; impact-resistant performance; plastic zone; energy absorption polyurethane elastomer; strain rate; impact-resistant performance; plastic zone; energy absorption

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Fan, J.; Chen, A. Studying a Flexible Polyurethane Elastomer with Improved Impact-Resistant Performance. Polymers 2019, 11, 467.

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