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：“I will break with her gradually,” he said, like the tyro he was, and he pictured to himself the wretched scenes in which she would abuse him, reproach him, probably compromise herself, the letters she would write to him. At any rate he need not read them. Oh! how tired he was of the whole thing beforehand. Why had he been such a fool He looked at the termination of the liaison as a bad sailor looks at an inevitable sea passage at the end of a journey. It must be gone through, but the prospect of undergoing it filled him with disgust.
A brougham passed him swiftly on noiseless wheels, and the woman in it caught a glimpse of the high-bred clean-shaved face, half savage, half sullen in the hansom.
