氢氧化镁的不同改性方式对EVA基电缆料性能影响

发布时间：2018-03-21 03:18

本文选题：氢氧化镁改性　切入点：EVA　出处：《电线电缆》2016年06期 　论文类型：期刊论文

【摘要】：从复合材料的界面作用和改性剂的改性机理角度探讨不同表面改性剂改性的Mg(OH)2对EVA基电缆料体系的微观结构和力学性能、耐热性能、阻燃性能和耐油性能的影响。热失重分析结果表明,氨基硅烷改性后耐热稳定性增加;硬脂酸改性后体系耐热性能下降。扫描电镜谱图显示经表面改性剂改性确实能改善Mg(OH)2在EVA中的分散程度。综合性能分析表明,氨基硅烷改性Mg(OH)2/EVA体系相对未改性和其他两种改性体系的内部结合作用力更高,而且强度增加,阻燃性能大幅度提高,耐油性能改善明显;硬脂酸改性和聚合物改性后,体系强度降低,断裂拉伸应变大幅度提高;由于硬脂酸结合力较低,导致体系阻燃性能和耐油性能最差。
[Abstract]:The microstructure, mechanical properties and heat resistance of Mg(OH)2 modified by different surface modifiers on EVA based cable system were discussed from the point of view of the interfacial action of composites and the modification mechanism of modifier. The results of thermogravimetric analysis showed that the thermal stability of aminosilane was increased after modification. The heat resistance of stearic acid modified system decreased. The SEM spectra showed that the surface modifier modification could improve the dispersion of Mg(OH)2 in EVA. The internal binding force of the modified Mg(OH)2/EVA system is higher than that of the unmodified and other two modified systems, and the flame retardancy and oil resistance of the modified Mg(OH)2/EVA system are greatly improved with the increase of the strength, the modification of stearic acid and the modification of the polymer, the internal binding force of the modified Mg(OH)2/EVA system is higher than that of the other two modified systems. The strength of the system decreased and the tensile strain of the system increased greatly, and the flame retardancy and oil resistance of the system were the worst due to the low adhesion of stearic acid.
【作者单位】：上海至正道化高分子材料股份有限公司;
【分类号】：TM21

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