Abstract In this study, three types of copolymers, including copolymer without porogen (CWOP), copolymer with sodium chloride porogen (CWP1), and copolymer with sodium tartrate porogen (CWP2), were prepared by the inverse vulcanization of sulfur with safflower oil, and then characterization was done by various techniques. FTIR confirmed the presence of functional groups, and TGA revealed the degradation pattern of copolymers, indicating that CWP1 was stable among the other copolymers.