耐热聚 ((碳 - ) 粘合剂 耐热聚 ((碳 - ) 粘合剂
Chongwen Yu1,2, Xuejie Wang1,3, Jiaqi Sun1
1Zhejiang Key Laboratory of Data-Driven High-Safety Energy Materials and Applications, Ningbo Key Laboratory of Special Energy Materials and Chemistry, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, China.
Macromolecular rapid communications
|April 30, 2025
概括
新的聚乙烯功能化聚碳酸 (PCS) 粘合剂为恶劣环境提供了卓越的热稳定性和粘合力. 这些高温粘合剂克服了传统有机材料的局限性,显示了对航空航天和苛刻应用的希望.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
- 粘附科学 粘附科学 粘附科学
背景情况:
- 有机粘合剂被广泛使用,但在高温下由于氧化和降解而失败.
- 恶劣的环境,如航空航天,需要具有增强热稳定性和强大的性能的粘合剂.
- 现有的有机粘合剂缺乏适用于极端温度应用的必要弹性.
研究的目的:
- 开发具有更好的热稳定性和粘合力的新型高温粘合剂.
- 为了合成和表征基于乙烯基功能化的聚碳酸 (PCS) 基粘合剂.
- 调查交联密度对PCS粘合剂的热和机械性能的影响.
主要方法:
- 通过一方法合成维尼尔功能化PCS (PCS-x%).
- 使用2,5-Dimethyl-2,5-di(tert-butylperoxy) hexane对PCS-x%进行交叉连接,以形成c-PCS-x%的粘合剂.
- 评估热稳定性 (减重),在不同温度下的粘合强度,以及老化后的性能.
主要成果:
- 所有合成的c-PCS-x%粘合剂都表现出良好的热稳定性,体重减少<10%.
- c-PCS-75%的体重减轻率最低 (3.6%),这是由于抑制了挥发和增加了凝聚力的能量.
- 与线性类似物相比,c-PCS-x%粘合剂在高达250°C的温度下表现出更高的粘合强度.
- 在200°C/24小时老化后,c-PCS-25%保持了5.68 MPa的附着强度,并通过了10分钟的1公斤负载的消化试验.
结论:
- 拓控制的多 ((碳 - ) 网络为高温粘合剂提供了一种新的分子设计.
- 开发的粘合剂具有出色的热稳定性和粘合力,克服了传统有机粘合剂的局限性.
- 这些先进的材料适用于苛刻的环境中的苛刻应用,包括航空航天.
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