Preparation of high self-healing efficient crosslink HTPB adhesive for improving debonding of propellant interface,New Journal of Chemistry

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Preparation of high self-healing efficient crosslink HTPB adhesive for improving debonding of propellant interface
New Journal of Chemistry ( IF 2.7 ) Pub Date : 2020-10-12 , DOI: 10.1039/d0nj04085a
Jing Tu _{1,

2,

3,

4} , Heng Xu _{1,

2,

3,

4} , Li Liang _{1,

2,

3,

4} , Pingyun Li _{1,

2,

3,

4} , Xiaode Guo _{1,

2,

3,

4}

Affiliation

The problem of debonding the interface between propellant grain and propellant coating has been a tricky problem that has puzzled many scholars. Self-healing adhesives are expected to solve this problem. Herein, we studied the most widely used HTPB system in composite propellants. By adopting free radical polymerized HTPB as the soft segment of the adhesive and introducing aromatic disulfides, we successfully prepared a self-healing polyurethane adhesive. The adhesive can self-heal at a safe temperature of 80 °C, with an elongation at break of more than 700% and a self-healing efficiency of up to 97%, and has excellent thermal stability. The interface self-healing experiment showed that the adhesive can recover the debonding damage at the interface. Our results will provide a new insight into the rebonding of the interface between propellant grain and coating.

中文翻译：

制备高自愈高效交联HTPB胶以改善推进剂界面的脱粘性

使推进剂颗粒与推进剂涂层之间的界面脱粘的问题一直是棘手的问题，这使许多学者感到困惑。自愈粘合剂有望解决此问题。在本文中，我们研究了复合推进剂中使用最广泛的HTPB系统。通过采用自由基聚合的HTPB作为胶粘剂的软链段并引入芳族二硫化物，我们成功地制备了自修复聚氨酯胶粘剂。该胶粘剂可以在80°C的安全温度下自愈，断裂伸长率超过700％，自愈效率高达97％，并且具有出色的热稳定性。界面自修复实验表明，该胶粘剂可以恢复界面处的剥离损伤。

更新日期：2020-11-04

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