Fully Aromatic High Performance Thermoset via Sydnone–Alkyne Cycloaddition
详细信息 查看全文
- 作者：Nisha V. Handa ; Shaoguang Li ; Jeffrey A. Gerbec ; Naoko Sumitani ; Craig J. Hawker ; Daniel Klinger
- 刊名：Journal of the American Chemical Society
- 出版年：2016
- 出版时间：May 25, 2016
- 年：2016
- 卷：138
- 期：20
- 页码：6400-6403
- 全文大小：324K
- 年卷期：0
- ISSN：1520-5126
文摘
We have developed an efficient synthetic platform for the preparation of a new class of high performance thermosets based on the 1,3-dipolar cycloaddition of a bifunctional sydnone with a trifunctional alkyne. These processable materials possess outstanding thermal stability, with Td5% of 520 °C and a weight loss of <0.1% per day at 225 °C (both in air). Key to this performance is the stability of the starting functional groups that allows for reactive B-staging via simple thermal activation to give fully aromatic and highly cross-linked polypyrazole-based thermosets.