Propylene sulfide is primarily used in the synthesis of polymers and copolymers, where it acts as a monomer to produce materials with specific properties such as flexibility, durability, and chemical resistance. It is also employed in the production of polysulfide rubbers, which are valued for their excellent resistance to solvents, oils, and weathering, making them suitable for use in seals, gaskets, and coatings. Additionally, propylene sulfide finds application in the field of organic synthesis, where it serves as a building block for creating various sulfur-containing compounds that are useful in pharmaceuticals, agrochemicals, and specialty chemicals. Its reactivity with other chemicals makes it a versatile intermediate in the development of advanced materials and functionalized products.