热塑性高阻燃聚烯烃护套料ε_(b)测试制样方法探讨  

Discussion on the Sample Preparation Method for Testingε_(b) of Thermoplastic High Flame Retardant Polyolefin Sheathing Materials

作　　者：潘仁勇 张恒玮 刘涛 刘峰 符春庆 李岚彬 PAN Renyong;ZHANG Hengwei;LIU Tao;LIU Feng;FU Chunqing;LI Lanbin(Sunway Co.,Ltd.,Leshan 614001,Sichuan,China)

机构地区：[1]尚纬股份有限公司,四川乐山614001

出　　处：《光纤与电缆及其应用技术》2024年第3期41-44,共4页Optical Fiber & Electric Cable and Their Applications

摘　　要：轨道交通电缆用护套材料断裂伸长率ε_(b)的准确测定有助于对其应用性能的评定,为此展开了热塑性高阻燃聚烯烃护套料ε_(b)测试制样方法的研究与分析。通过对先塑炼后模压法、直接粒料模压法、挤塑法、先挤塑后模压法4种制样方法得到试样的ε_(b)测试数据对比,发现按标准GB/T 32129—2015和JB/T 10707—2007中模压法制得试样的ε_(b)测试数据较为分散、测试结果偏低,而挤塑法制得试样的ε_(b)测试数据更加集中和稳定可靠。同时,将上述ε_(b)测试结果与按标准GB/T 2951.11—2008中高温处理试样的ε_(b)测试数据对比,发现高温处理可改善热塑性高阻燃聚烯烃护套材料ε_(b)测试数据分散性,但对不同制样方法制得试样的ε_(b)测试数据平均值无明显的影响。The accurate determination of the elongation at break ε_(b) of sheath materials for rail transit cables helps to evaluate their application performance. Therefore, research and analysis have been conducted on the sample preparation method for testing ε_(b) of thermoplastic high flame retardant polyolefin sheathing materials. Comparison of ε_(b) test data obtained by four sample preparation methods(first plastic refining followed by molding, direct granular molding, extrusion, and first extrusion followed by molding), it is found that the ε_(b) test data of the sample prepared by molding method according to the standards GB/T 32129—2015 and JB/T 10707—2007 are relatively scattered and the ε_(b) test results are relatively low, while the ε_(b) test data of the sample prepared by extrusion method are more centralized, stable, and reliable. At the same time, comparing the above test results with the ε_(b) test data of high-temperature treated samples according to the standard GB/T 2951.11—2008, it is found that high-temperature treatment can improve the dispersion of ε_(b) test data for thermoplastic high flame retardant polyolefin sheathing materials, but has no significant impact on the ε_(b) test data average of samples prepared by different sample preparation methods.

关 键 词：高阻燃聚烯烃 电缆护套料 断裂伸长率 模压法 挤塑法 高温处理 

分 类 号：TM247[一般工业技术—材料科学与工程]