Biobased thermoplastic polyamide elastomers (TPAEs) have received increasing attention in both academia and industry. Here, a series of semi-biobased long-chain TPAEs are successfully synthesized via one-step melt polymerization, employing polyamide 1210 (PA1210) and polyetheramines (PEAs) as hard and soft segments, respectively. The prepared TPAEs demonstrate excellent mechanical properties, energy dissipation capabilities, low density, good damping, high resilience, and low melting temperature. More interestingly, the properties of the TPAEs can be customized by adjusting the content and molecular weight of PEA. By varying the molecular weights of the PEAs, two different thermal behaviors can be observed in the prepared TPAEs. Specifically, PEA with low molecular weight has good compatibility with PA1210, leading to an increase in the conformation of the crystalline region and a significant decrease in melting temperature. Meanwhile, high molecular weight PEA causes strong phase separation with PA1210, leading to limited crystalline regions and inadequate physical cross-linking, further resulting in suboptimal mechanical properties. This work provides new insights into the design and preparation of PEA-type biobased long-chain TPAEs.

中文翻译：

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聚醚胺型半生物基长链聚酰胺 1210 弹性体：合成、结构和独特的热行为

生物基热塑性聚酰胺弹性体（TPAE）在学术界和工业界受到越来越多的关注。在这里，通过一步熔融聚合成功合成了一系列半生物基长链TPAE，分别采用聚酰胺1210（PA1210）和聚醚胺（PEA）作为硬链段和软链段。制备的TPAE表现出优异的机械性能、能量耗散能力、低密度、良好的阻尼、高弹性和低熔化温度。更有趣的是，TPAE的性能可以通过调整PEA的含量和分子量来定制。通过改变 PEA 的分子量，可以在制备的 TPAE 中观察到两种不同的热行为。具体而言，低分子量的PEA与PA1210具有良好的相容性，导致结晶区构象增加，熔融温度显着降低。同时，高分子量 PEA 会与 PA1210 产生强烈的相分离，导致有限的结晶区域和不充分的物理交联，进一步导致机械性能不佳。这项工作为PEA型生物基长链TPAE的设计和制备提供了新的见解。