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首页> 外文期刊>Journal of Applied Polymer Science >The Structure and Dynamic Properties of Thermoplastic Polyurethane Elastomer/Hindered Phenol Hybrids
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The Structure and Dynamic Properties of Thermoplastic Polyurethane Elastomer/Hindered Phenol Hybrids

机译：热塑性聚氨酯弹性体/受阻酚杂化物的结构和动力学性质

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摘要

The organic hybrids of thermoplastic polyurethane (TPU)/hindered phenol (AO-80) were prepared through melt blending, which was followed by hot and cold pressing procedure. The microstructure and dynamic mechanical properties of the hybrids were systematically investigated through SEM, DSC, XRD, FTIR, DMA and a tensile tester. The experimental results indicated that AO-80 was completely dissolved in the matrix. The glass transition of the soft segments of TPU was found to shift to higher temperature with the amount of AO-80 increasing, whereas the glass transition of the hard segments exhibited nearly no evident change, indicating that AO-80 was selectively located in the soft region of TPU and the formation of the strong intermolecular interactions (hydrogen bonding) between AO-80 and the soft region of TPU. With the increase of AO-80 in the hybrids, the tan delta peak gradually shifted to higher temperatures and the maximal tan delta value increased from 0.4 to 1.6. Meanwhile, the glass transition temperature ranges broadened and the TA value increased greatly with the more content of AO-80. Because of the decrease of the hard segments amount in the hybrids, the tensile stress of these hybrids decreased, but still maintained at a high level. The hybrids were expected to have potential applications as high performance damping materials combined with good mechanical properties.
机译：通过熔融共混制备热塑性聚氨酯（TPU）/受阻酚（AO-80）的有机杂化物，然后进行热压和冷压步骤。通过SEM，DSC，XRD，FTIR，DMA和拉伸试验机系统地研究了杂种的微观结构和动态力学性能。实验结果表明，AO-80完全溶解在基质中。随着AO-80含量的增加，TPU的软链段的玻璃化转变转变为较高的温度，而硬链段的玻璃化转变几乎没有明显变化，表明AO-80选择性地位于软化段TPU区域和AO-80与TPU软区域之间强烈的分子间相互作用（氢键）的形成。随着AO-80含量的增加，tanδ峰逐渐向较高温度转移，tanδ的最大值从0.4增加到1.6。同时，随着AO-80含量的增加，玻璃化转变温度范围扩大，TA值大大提高。由于杂种中硬链段数量的减少，这些杂种的拉伸应力降低，但仍保持在高水平。预计混合动力车将具有高性能减震材料和良好的机械性能的潜在应用。

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