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：Rachel’s grave amused glance fell upon Hugh. Their eyes met, and he instantly perceived to his astonishment that she recognised him. But she did not bow, and a moment later left the nearly empty rooms with the man who was talking to her.
Hugh was excited out of recognition of his former half-scornful, half-blasé self. That woman must be his wife. She would save him from himself, this cynical restless self which never remained in one stay. The half acknowledged weakness in his nature unconsciously flung itself upon her strength, a strength which had been tried. She would love him, and uphold him. There would be no more yielding to circumstances if that pure strong soul were close beside him. He would lean upon her, and the ugly bypaths of these last years would know him no more. Her presence would leaven his whole life. In the momentary insanity, which was perhaps after all only a prophetic intuition, he had no fears, no misgivings. He thought that with that face it was not possible that she could be so wicked as to refuse him.
