Properties of an stable piperidinooxyl radical with long-train structure

Piperidinooxyl radical with long-train structure is synthesized. The ESR spectrogram proves that piperidinooxyl radical is produced. The dilatometer tests prove that the piperidinooxyl radical with long-train structure performs prominent inhibition role on styrene bulk polymerization initiated with AIBN on 60°C. The ultraviolet-visible spectrometry reveals that the piperidinooxyl radical with long-train structure strongly absorbs the UV light which will cause the plastic aging and whose wavelength is between 230-350 nm. TG analysis shows that the piperidinooxyl radical with long-train structure are quite stable at high temperature. The results indicate that the piperidinooxyl radical with long-train structure is capable of being used as a kind of plastic additive with good anti-aging performance.