特性
（1）PEI的特点是在高温下具有高的强度、高的刚性、耐磨性和尺寸稳定性。（2）PEI是琥珀色透明固体，不添加任何添加剂就有固有的阻燃性和低烟度，氧指数为47%，燃烧等级为UL94-V-0级。（3）PEI的密度为1.28~1.42g/cm3，玻璃化温度为215℃,热变形温度198~208℃,可在160~180℃下长期使用,允许间歇使用温度为200℃。（4）PEI具有优良的机械强度、电绝缘性能、耐辐射性、耐高低温及耐疲劳性能和成型加工性；加入玻璃纤维、碳纤维或其他填料可达到增强改性目的。
PEI一指聚醚酰亚胺（Polyetherimide），它还指的是人员效率指标。 PEI （聚醚酰亚胺）是琥珀色透明固体，不添加任何添加剂PEI原料颗粒图片就有固有的阻燃性和低烟度，氧指数为47%，燃烧等级为UL94-V-0级，密度为1.28~1.42g/cm3。PEI具有很强的高温稳定性，即使是非增强型的PEI，仍具有很好的韧性和强度。因此利用PEI优越的热稳定性可用来制作高温耐热器件。具有优良的机械性能、电绝缘性能、耐辐照性能、耐高低温及耐磨性能，并可透过微波。
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详细说明：A great deal of thinking may be compressed into a quarter of an hour, especially if it has been long eluded.
“I will get out,” he said again to himself with an impatient movement. It was beginning to weary him, this commonplace intrigue which had been so new and alluring a year ago. He did not own it to himself, but he was tired of it. Perhaps the reason why good resolutions have earned for themselves such an evil repute as paving stones is because they are often the result, not of repentance, but of the restlessness that dogs an evaporating pleasure. This liaison had been alternately his pride and his shame for many months. But now it was becoming something more, which it had been all the time, only he had not noticed it till lately — a fetter, a clog, something irksome, to be cast off and pushed out of sight. Decidedly the moment for the good resolution had arrived.
