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首页> 外文期刊>Journal of Applied Polymer Science >Blends of Thermoplastic Polyurethanes and Polyamie 12 : Structure, Molecular Interaction, Relaxation, and Mechanical Properties
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Blends of Thermoplastic Polyurethanes and Polyamie 12 : Structure, Molecular Interaction, Relaxation, and Mechanical Properties

机译：热塑性聚氨酯和聚酰胺12的共混物：结构，分子相互作用，弛豫和机械性能

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摘要

Studies were done to understand the effects of polyamide 12 (PA 12) incorporation on microphase separation (microsegregation) in thermoplastic polyurethanes (TPU) based on oligoether (polytetramethylene oxide, molecular weight, 1000) and ologoester polyethylene butylene glycol adipate, molecular weight, 2000) and relaxation transitions, compatibility, and molecular interaction energy in polymer blends. It was learned that the addition of PA 12 caused partial degradation of the domain structure in the oligoester-containing polyurethane, whereas interaction of hard blocks in the oligoether-containing polyurethane increased. Analyzing compatibility and interphase interactions in blends is possible in the frame of the quantum theory of relaxation processes. Also, interferences of the components on characteristic temperatures of relaxation transitions were studied. Partial compatiblity was detected between PA 12 and the soft block of oligoether-based TPU over the whole range of components concentrations tested. For oligoester-based TPU, partil compatibility was observed only at low polyamide concentrations (up to 20 wt %). Effects of a polyurethane phase on PA 12 crystallization in the blends along with the pattern of concentration-mechanical properties dependencies are discussed.
机译：进行了研究以了解聚酰胺12（PA 12）掺入对基于低聚醚（聚四亚甲基氧化物，分子量为1000）和己二酸酯聚丁二醇己二酸酯的分子量为2000的热塑性聚氨酯（TPU）中的微相分离（微分离）的影响。 ）和聚合物共混物中的弛豫转变，相容性和分子相互作用能。据了解，PA 12的添加导致含低聚酯的聚氨酯中畴结构的部分降解，而含低醚的聚氨酯中硬嵌段的相互作用增加。在弛豫过程的量子理论框架内，可以分析共混物中的相容性和相间相互作用。同样，研究了组分对弛豫转变特​​征温度的干扰。在测试的所有组分浓度范围内，在PA 12和基于寡醚的TPU软嵌段之间检测到部分相容性。对于基于低聚酯的TPU，仅在低聚酰胺浓度（最高20 wt％）下观察到部分相容性。讨论了聚氨酯相对共混物中PA 12结晶的影响，以及浓度-机械性能依赖性的模式。

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