The incorporation of 2 to 25 µm particles of a limited class of polyimides having appreciable nonaromatic character into heat curable epoxy resin systems significantly increases the toughness of such systems without loss of other desirable properties. These toughened epoxy resin systems are useful in preparing carbon fiber reinforced composites having compression strength after impact (CAI) of greater than 45 Ksi after a 1500 in-lb/in impact.
在热固化环氧
树脂体系中加入 2 至 25 µm 的具有明显非芳香族特性的有限类别的聚
酰亚胺颗粒,可显著提高此类体系的韧性,而不会损失其他理想特性。这些增韧环氧
树脂体系可用于制备碳纤维增强复合材料,在受到 1500 英寸-磅/英寸冲击后,其冲击后压缩强度(CAI)大于 45 Ksi。