
1. 氢能储运装备与安全检测技术陕西省高校工程研究中心,西京学院
2. 中广核高新核材集团有限公司
Published:2025
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秦慧劼, 张彤威, 党波, et al. 纳米海泡石对镁磷体系阻燃EVA的影响[J]. 2025, (3): 18-27.
秦慧劼, 张彤威, 党波, et al. 纳米海泡石对镁磷体系阻燃EVA的影响[J]. 2025, (3): 18-27. DOI: 10.16105/j.dxdl.1672-6901.20258039.
文中以纳米海泡石(以下简称海泡石)作为增效剂,制备了阻燃乙烯-醋酸乙烯共聚物(ethylene-vinyl acetate copolymer
EVA)复合材料。根据材料配方制备样品,并通过硬度、拉伸试验、热失重分析、氧指数和锥形热量计测试等试验,研究海泡石对镁磷体系阻燃EVA的机械性能、热性能和阻燃性能的影响。结果表明,随着海泡石添加量的增加,样品硬度呈上升趋势,断裂强度呈下降趋势,断裂伸长率呈先上升后下降的趋势。绝缘电阻方面,海泡石的添加量小于2 g时,样品的体积电阻率升高;海泡石的添加量超过2 g时,样品的体积电阻率急剧下降。热性能方面,随着海泡石添加量的增加,样品的初始熔融温度、熔融峰、结晶温度和结晶度等均先升高后降低。受热过程有3个失重阶段,第一分解峰温度在海泡石添加量小于2 g时变化较小,海泡石添加量大于2 g时下降幅度较大;随着海泡石添加量的增加第二分解峰温度从383.8℃下降至375.9℃,第三分解峰温度基本保持不变。极限氧指数测试中,随着海泡石添加量的增加,极限氧指数逐渐上升,从32.7%上升至34.7%。锥形量热试验中,添加适量的海泡石可以有效降低火灾行为参数。灰烬图片显示,海泡石添加量为2 g时,能够与阻燃剂形成致密的结壳层,起到阻碍火苗向内部扩散的作用。
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