Fabrication of Highly Thermally Resistant and Self‐Healing Polysiloxane Elastomers by Constructing Covalent and Reversible Networks

• DOI: 10.1002/marc.202300191
• Publication Date: 2023-06-17T07:32:45Z
• Authors: Yuanbo Cai; Yuan Wang; Lu Long; Shengtai Zhou; Liwei Yan; Junhua Zhang; Huawei Zou
• Keywords: Polydimethylsiloxane; Thermal Stability

The fabrication of self-healing elastomers with high thermal stability for use in extreme conditions such as aerospace remains a major challenge. A strategy preparing stable covalent bonds and dynamic metal-ligand coordination interactions crosslinking sites polydimethylsiloxane (PDMS) is proposed. added Fe (III) not only serves the point at room temperature which crucial performance, but also plays role free radical scavenging agent temperatures. results show that PDMS possessed an initial degradation over 380 °C efficiency 65.7%. Moreover, char residue 800 elastomer reaches 7.19% nitrogen atmosphere, up to 14.02% air atmosphere by doping small amount (i.e., 0.3 wt%) (III), remarkable contain weak relatively poor stability. This study provides insight into designing PDMS-based materials can be targeted high-temperature protection coatings.