Insulating and sheathing materials of electric and optical cables - common test methods - part 4 - 2 : methods specific to polyethylene and polypropylene compounds - tensile strength and elongation at break after conditioning at elevated temperature - wrapping test after conditioning at elevated temperature - wrapping test after thermal ageing in air - measurement of mass increase - long - term stability test - test method for copper - catalyzed oxidative degradation 电缆和光缆的绝缘和护套材料.通用试验方法.第4 - 2部分:聚乙烯和聚丙烯化合物专用方法.高温处理后抗拉强度和断裂伸长度.高温处理后的卷绕试验.在空气中热老化后的卷绕试验.质量增加的测量.长期稳定性试验.催化铜氧化降解的试验方法
