X型聚丙烯纤维力学性能试验研究

Experimental Study on Mechanical Property of X-Typical Polypropylene Fiber

针对日本生产的X型聚丙烯纤维,采用微机控制电子万能试验机,对其抗拉强度、断裂伸长率、弹性模量等力学指标进行了试验,并与分别经过pH值为12.5的碱溶液和120℃的烘箱处理后的纤维力学性能进行了对比。试验结果表明:①X型聚丙烯纤维拉伸强度高、弹性模量大、延性好;②纤维耐碱、耐热性能好,经碱溶液处理后,纤维拉伸强度、弹性模量和断裂伸长率分别达到处理前的93.8%、96.3%、89.6%;经耐热处理后,纤维拉伸强度、弹性模量和断裂伸长率分别达到处理前的98.7%、99.4%、93.4%。

The tensile strength, elongation rate at rupture, elastic modulus etc. of X-shape bar polypropylene fiber made in Japan were tested by using electronic university testing machine controlled by microcomputer. These mechanical indexes are respectively compared with these of the fiber soaked in the alkali water at pH 12. 5 and baked in the dry oven at 120℃. The results show that, ①for the X-shape polypropylene fiber, it has high tensile strength ＆ elastic modulus, good ductility. ②it has good alkali-resistance ＆ heat resistance, after the fiber was soaked in the alkali water at pH 12.5, its tensile strength, elongation rate at rupture, elastic modulus is over 90% of these before the alkali water procession respectively, and after the fiber was baked in the dry oven at 120℃, its tensile strength, elongation rate at rupture, elastic modulus is over 93% of these before heat procession respectively.