采用冻胶纺丝法制备超高分子量聚丙烯纤维(UHMWPP),并在不同的拉伸温度下对其进行拉伸.研究了在不同拉伸倍率下,拉伸温度对UHMWPP纤维力学性能的影响.结果表面:UHMWPP纤维在室温低拉伸倍率下表现为结晶高聚物的拉伸行为,高温时则为硬弹性材料的拉伸行为.纤维的断裂强度与杨氏模量主要由拉伸倍率决定,断裂伸长率则由拉伸倍率和拉伸温度决定.
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