聚合物的断裂强度,辐射强度和超导磁体的可通性
Anders Gaarud1, Christian Scheuerlein1, David Mate Parragh1
1European Organization for Nuclear Research (CERN), Esplanade des Particules 1, 1211 Geneva, Switzerland.
Polymers
|May 11, 2024
概括
研究人员在低温温度下提高了环氧树脂的断裂性,用于在低温温度下制造超导磁体. 添加柔性剂提高了性,但不影响辐射抵抗或加工,从而产生了用于卷轴浸的新树脂.
科学领域:
- 材料科学 材料科学 材料科学
- 低温工程 低温工程是什么?
- 聚合物科学 聚合物科学
背景情况:
- 超导磁线圈需要在冷温度下具有高断裂性和辐射硬度的树脂,这通常是相互冲突的特性.
- 现有的环氧树脂在同时达到最佳的冷性和耐辐射性方面存在局限性.
- 聚氨,聚碳酸 (PC) 和聚甲基酸 (PMMA) 被用作性比较的基准.
研究的目的:
- 评估和改进用于超导磁线圈浸的环氧树脂系统的冷断裂性.
- 为了研究将多糖醇柔性化剂 (Araldite DY040) 添加到现有的环氧系统 (CTD101K) 的效果.
- 评估这种修改对辐射硬度和加工特性的影响.
主要方法:
- 对各种环氧树脂系统,聚氨,PC和PMMA在室温和77K的压裂性测试.
- 用高达38MGy的质子和玛剂量对树脂系统进行辐射,以评估辐射诱导的衰老.
- 在加工温度下对改性树脂混合物的粘度测量.
主要成果:
- 在经过测试的环氧系统中,MY750环氧系统表现出最高的77K断裂性 (KIC = 4.6 MPa√m),与PMMA相当.
- 测试的聚氨系统显示77K度明显高于环氧树脂,接近PC的度.
- 经过修改的CTD101K系统 (POLAB Mix) 使用DY040柔性化剂,在没有显著改变辐射诱导老化或粘度的情况下,证明了77K骨折性得到改善.
结论:
- 添加Araldite DY040柔性化剂有效地提高了CTD101K环氧树脂的低温断裂性.
- 经过修改的POLAB Mix保持了良好的处理能力和耐辐射性,使其适用于超导磁线圈浸.
- 波拉布混合 (POLAB Mix) 是一种有前途的新树脂配方,用于超导磁体技术的苛刻应用.
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