Synthesis and thermal properties of novel silicone resins containing phthalonitrile groups

Abstract

Silicone resins are widely used in various fields because of their excellent high thermal stability. To improve their comprehensive performances, many organic resins have been used for modification of silicone resins. In this article, silicone resins containing phthalonitrile groups were synthesized by the reaction of the silicone resin containing amino groups and 4-(2-oxiranylmethoxy)-1,2-benzenedicarbonitrile. The structures of phthalonitrile-modified silicone resins were characterized by Fourier transform infrared spectroscopy (FT-IR) and nuclear magnetic resonance (¹H-NMR). The curing process was characterized by differential scanning calorimetry and FT-IR. Thermogravimetric analysis results showed that the cured modified silicone resins had good thermal stabilities. Dynamic mechanical analysis indicated that they owned high glass transition temperature, suggesting that silicone resins containing phthalonitrile groups have high-temperature resistance.

Graphical abstract

Keywords:

• Silicone resins
• phthalonitrile
• thermal stability
• modification
• silicone materials

Disclosure statement

The authors declared that there is no conflict of interest.

Additional information

Funding

This work is supported by the Natural Science Foundation of Shandong Province (ZR2021LFG014); the open funds of the Shandong Key Laboratory of Advanced Organosilicon Materials and Technologies; Colleges and Universities Twenty Foundational Projects of Jinan City (2021GXRC068); Projects of introducing innovation teams in Jinan (202228025).