高压电缆材料用聚丙烯复合材料的制备及性能  

Preparation and Properties of Polypropylene Composites for High Voltage Cable Materials

作　　者：苏旖荧 SU Yi-ying(Zhicheng College,Fuzhou University,Fuzhou 350001,Fujian,China)

机构地区：[1]福州大学至诚学院,福建福州350001

出　　处：《合成纤维》2023年第10期66-70,共5页Synthetic Fiber in China

摘　　要：聚丙烯在绝缘电缆中的应用广泛,但在长期腐蚀环境下服役后易产生绝缘性变差、力学强度降低等问题,而通过掺加纳米碳酸钙实现改性处理,可改善其绝缘性能。为此,基于聚丙烯与碳酸钙无机纳米粒子等材料制备了不同配比的聚丙烯复合材料,并对其相关性能开展分析。试验结果显示:质量分数95.5%的聚丙烯与质量分数3%的纳米碳酸钙配比下的试验组具备优良的电绝缘性,其介电常数为3.12,交流和直流击穿强度均远高于规范规定的20 kV/mm;该配比下的聚丙烯复合材料的拉伸强度相比未掺加碳酸钙试验组有所降低,但仍符合规范使用标准;热空气老化与酸碱老化处理后,其拉伸强度与击穿强度也满足使用需求。分析认为,所述配比下的聚丙烯复合材料适用于高压电缆材料。Polypropylene is widely used in insulated cables,but it is prone to problems such as poor insulation and reduced mechanical strength after long-term service in corrosive environments.However,by adding nano calcium carbonate for modification,its insulation performance can be improved.Therefore,polypropylene composites with different ratios were prepared based on polypropylene and calcium carbonate inorganic nanoparticles,and their related properties were analyzed.The experimental results show that the experimental group with the ratio of 95.5% polypropylene by mass fraction and 3% nano calcium carbonate by mass fraction has excellent electrical insulation,its dielectric constant is 3.12.The AC and DC breakdown strength is much higher than the 20 kV/mm specified in the code.The tensile strength of the polypropylene composite material at this ratio has decreased compared to the test group without adding calcium carbonate,but it still meets the standard for standard use.After hot air aging and acid-base aging treatment,its tensile strength and breakdown strength also meet the usage requirements.The analysis shows that the polypropylene composites at the ratio is suitable for high-voltage cable materials.

关 键 词：纳米碳酸钙 聚丙烯复合材料 高压电缆 性能 

分 类 号：TQ325.1[化学工程—合成树脂塑料工业]