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Thermoplastic polyurethane foamed under microwave irradiation

机译：微波辐射下发泡的热塑性聚氨酯

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摘要

Microwave heating has a number of advantages over the conventional method. However, most thermoplastics are relatively transparent for microwave irradiation. In the case of poly-urethanes, these materials absorb microwaves to a sufficient extent to be heated. This effect can be enhanced by the use of fillers such as carbon black. In this paper, the ability of thermoplastic polyurethane and its composite with carbon black to be heated by microwave irradiation and to be foamed using chemical blowing agents are discussed. The temperature changes in different parts of samples as the heating effect under microwave irradiation with 500 W power were analyzed. Selected porous products were obtained under microwave irradiation using azodicarbonamide as a chemical blowing agent. The influence of foaming conditions on cell structure, apparent density and mechanical properties of porous products was estimated.
机译：与常规方法相比，微波加热具有许多优点。然而，大多数热塑性塑料对于微波辐射是相对透明的。在聚氨酯的情况下，这些材料吸收微波的程度足以被加热。通过使用填充剂（例如炭黑）可以增强此效果。在本文中，讨论了热塑性聚氨酯及其与炭黑的复合材料通过微波辐射加热和使用化学发泡剂发泡的能力。分析了在500 W功率的微波辐照下样品不同部位的温度变化与加热效果。使用偶氮二甲酰胺作为化学发泡剂，在微波辐射下获得选定的多孔产物。评估了发泡条件对多孔产品的泡孔结构，表观密度和机械性能的影响。

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