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首页> 外文期刊>RSC Advances >Tuning chain extender structure to prepare high-performance thermoplastic polyurethane elastomers
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Tuning chain extender structure to prepare high-performance thermoplastic polyurethane elastomers

机译：调整扩链剂结构以制备高性能热塑性聚氨酯弹性体

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In this work, a novel strategy is developed to solve the issue of mutually exclusive high mechanical robustness and thermo-stability for thermoplastic polyurethane (PU). A leaf-like and reticulate interfingering superstructure can be seen. The superstructure of polyurethanes can also be tuned by the polarity of chain extender molecular via changing the number for ferrocene redox centres, thus to further enhance the thermal stability and elasticity of PUs. As a result, by incorporating bisferrocene units into the main chain of PU, a high-performance PU elastomer can be synthesized with a highest initial degradation temperature of T _(5%) of 345 °C, a highest tensile strength of 42.3 MPa with an elongation over 1000%, as well as a toughness of 19.6 GJ m ~(?3) . These results conclusively suggest that high-performance thermoplastic polyurethane elastomers had great promise for potential application in a wide range of practical fields.
机译：在这项工作中，开发了一种新颖的策略来解决热塑性聚氨酯（PU）相互排斥的高机械强度和热稳定性问题。可以看到叶状和网状的指间上部结构。还可通过改变二茂铁氧化还原中心的数目，通过扩链剂分子的极性来调节聚氨酯的超结构，从而进一步增强PU的热稳定性和弹性。结果，通过将双二茂铁单元并入PU主链中，可以合成高性能PU弹性体，其最高初始降解温度T _（5％）为345°C，最高抗张强度为42.3 MPa。伸长率超过1000％，韧性为19.6 GJ m〜（？3）。这些结果最终表明，高性能热塑性聚氨酯弹性体在广泛的实际领域中具有潜在的应用前景。

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