“…In recent research, various kinds of polymers have been synthesized by copolymerization of SO 2 with unsaturated hydrocarbons, such as vinyl butyl carbonate, norbornene, styrene, propylene oxide, diene, and vinyl chloride, [2][3][4][5] and the formed polymers with high transparency, low dielectric constants, excellent chemical resistance, and good barrier properties, which are used as etching resists, transient electronic packaging, and drug delivery vehicles. [6][7][8][9] But different research groups choose different ways of polymerization, such as free radical polymerization, cationic polymerization, and coordination polymerization. [10,11] Effect of different polymerization methods on the copolymerization of olefins and sulfur dioxide has not been studied yet.…”