“…Sulfur (S) is the tenth most abundant element on earth and has been used in medicine, fabric bleaching, and gun powder formulation since antiquity. , With the development of the chemistry discipline, sulfur has been recognized as a valuable chemical agent, which is employed for producing sulfuric acid, sulfur-containing organic molecules; − medicines; , energy storage devices, like lithium (Li)–S batteries; , and polymeric materials. , Particularly, the incorporation of S atoms into a polymer main chain endows the material with many attractive features, including a high refractive index, mechanical properties, electrochemical properties, excellent adhesive ability to heavy metal ions, and so on. − In addition, the substitution of oxygen atoms in the polymer main chain with S atoms is capable of improving comprehensive performances of these polymers. − For example, the poly(butene trithiocarbonate), which is synthesized from the ring-opening polymerization (ROP) of seven-membered cyclic trithiocarbonate, exhibited superior thermal, mechanical, and optical properties than the corresponding poly(butene carbonate) …”