Synthesis equation of high-density polyethylene

High density polyethylene polymerization reaction equation: nCH2=CH2 → (CH2-CH2) n (reaction condition catalyst).
Additional information: Polyethylene is a thermoplastic resin made by polymerizing ethylene. In industry, it also includes copolymers of ethylene with small amounts of alpha olefins. Polyethylene is odorless, non-toxic, and feels like wax. It has excellent low-temperature resistance (with a minimum operating temperature of -100 to -70 ° C), good chemical stability, and can withstand most acid and alkali corrosion (not resistant to acids with oxidizing properties). Insoluble in general solvents at room temperature, with low water absorption and excellent electrical insulation. The polyethylene industry in China has been continuously developing in recent years, with an annual production capacity of 10.82 million tons as of 2011. According to the data from 2011, the domestic production of polyethylene was 10.152 million tons, and the apparent demand was 17.727 million tons. It can be seen that there is still a shortage of over 7 million tons of polyethylene in China, which has to rely on imports. Therefore, imported products occupy an important proportion of China's polyethylene market due to their relatively high performance and cost advantages. However, with the expansion of domestic production capacity and the diversification of olefin raw materials, China's self-sufficiency rate of polyethylene will significantly increase, and its external dependence will gradually decrease.