基于环氧矩阵的绕碳塑料的断裂强度,并用聚硫薄膜增强
Eldar B Dzhangurazov1,2, Tuyara V Petrova1, Aleksey V Shapagin3
1N.N. Semenov Federal Research Center for Chemical Physics, Russian Academy of Sciences, 119991 Moscow, Russia.
Polymers
|January 25, 2025
概括
将聚硫 (PSU) 薄膜添加到碳纤维增强塑料 (CFRP) 中,显著提高了断裂性. 这种改善归因于在固化过程中形成的异质结构,周期性负荷的影响最小.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物科学 聚合物科学
- 复合材料 复合材料 复合材料
背景情况:
- 碳纤维增强塑料 (CFRP) 是具有广泛应用的先进复合材料.
- 提高CFRP的断裂性对于其结构完整性至关重要.
- 聚硫 (PSU) 薄膜可以纳入聚合物矩阵,以增强材料性能.
研究的目的:
- 为了研究用聚硫薄膜增强的环氧矩阵绕CFRP的断裂机制.
- 评估聚硫薄膜在CFRP的断裂强度上所产生的影响.
- 确定循环负荷对这些增强复合材料破裂行为的影响.
主要方法:
- 使用两种类型的聚合物矩阵制造CFRP:环氧寡合物 (EO) 和EO改性聚硫 (PSU).
- 在绕阶段将聚硫薄膜融入中间层.
- 使用双杆梁分层方法确定断裂性 (G).
- 研究循环负荷对断裂性的影响.
主要成果:
- 聚硫薄膜在环氧粘合剂中溶解后形成的异质结构增加了断裂性,从0.5kJ/m2增加到1.2kJ/m2.
- 循环负荷对强化CFRP的断裂性影响微不足道.
- 沿着强化层附近的扩散区域观察到宏裂纹的传播,其特征是PSU矩阵-EO分散阶段.
结论:
- 加入聚硫薄膜作为强化层显著提高了环氧基CFRP的断裂性.
- 观察到的性增加与复合材料加工过程中特定异质微结构的形成有关.
- 这些发现表明,聚硫增强的CFRP提供了更好的耐损性,在循环负荷下具有稳定的性能.
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