摘要
分别在120、130、140℃温度环境下,对聚碳酸酯进行热氧老化实验。应用电子材料试验机、扫描电子显微镜(SEM)、红外光谱仪(FTIR)等手段,研究了聚碳酸酯热氧老化后的力学性能变化特性和断口形貌。结果表明:聚碳酸酯经120、130、140℃温度热氧老化后,强度和伸长率均随温度的升高而降低;断裂性质也随温度的升高,由塑性断裂转变成了脆性断裂。当聚碳酸酯热氧老化一定程度,断口上会出现孔洞形貌;孔洞是聚碳酸酯发生热氧老化失效的一种断口特征。
The mechanical properties and fractograph characterization of polycarbonate were researched by means of material testing machine, scanning electron microscopy （ SEM） and Fourier transform infrared spectroscopy （ FTIR） after thermal- oxidative aging experiments at 120 XI ~ 140 XI . The results show that the strength and elongation decrease with the increase of temperature. And the fracture property is also changed from ductile fracture to brittle fracture with the increase of temperature. When the thermal-oxidative aging of polycarbonate reaches a certain extent, there will be voids morphology on the fracture surface. They are a kind of the fractograph characterization for the thermal-oxidative eiging of polycarbonate.
出处
《失效分析与预防》
2017年第5期283-289,共7页
Failure Analysis and Prevention
关键词
聚碳酸酯
热氧老化
孔洞
表征
polycarbonate
thermal-oxidative aging
void
characterization
