How to develop a simple synthetic process to prepare novel materials with high sulfur content is still sorely lacking but urgent. Here a facile method which was termed "inverse vulcanization" to prepare thermally stable and processable polymeric materials was proposed through the direct radical copolymerization of elemental sulfur with limonene. FTIR

Raman spectroscopy

1H NMR

13C NMR

elemental analysis (EA) and GPC were used to investigate the structural composition and molecular weight of the sulfur-limonene oligomers (PSL). DSC and TGA were used to evaluate the thermal behavior of the obtained oligomers. Solubility experiments were also carried out to test whether these oligomers could be dissolved by several common organic solvents at room temperature. The results showed that the prepared sulfur-rich copolymers exhibited excellent thermostability

solubility and adhesion. The sulfur content in the obtained product increased with increasing initial feed ratios of sulfur. For PSL

when reaction time was 2 h and the reaction temperature was 210℃

the best product performance was obtained.