The polymerization process of polystyrene is a free radical chain reaction, but unless extreme conditions are used, it is difficult to form initial free radicals from stable styrene molecules. This is where an initiator (like benzoyl peroxide) needs to be added. Benzoyl peroxide (BPO) can break the weak O-O bond (fission occurs because the two oxygen atoms have the same electronegativity) to generate two benzoyl radicals.

Vinyl ester resin is prepared by the chemical reaction of epoxy resin and methacrylic acid through ring-opening addition. It retains the basic segment of epoxy resin, and has the good process performance of unsaturated polyester resin. After curing under suitable conditions, it shows some special excellent properties. Therefore, since the 1960s, it has developed rapidly. The Epocrgl brand was first launched by Shell Chemical in the United States, and then the Derakane brand was launched by Dow Chemical in the United States in 1966, followed by the Hetron brand of Ashland Chemical. , as well as the Ripoxy brand of Japan's Showa High Polymer Co., Ltd., other foreign brands or manufacturers include AOC, Interplastics, etc., and China also develops its own vinyl ester resins, such as Huachang MFE,

As basic chemical materials, special gases are widely used in large-scale petrochemicals, semiconductor devices, optical fibers, lasers, medical science, clinical diagnosis, medical disinfection, fruit ripening, food preservation and other fields. So what gases do special gases contain?

Ethanol is an important organic solvent and is widely used in various methods such as medicine, paint, sanitary products, cosmetics, oils and fats, accounting for about 50% of the total consumption of ethanol. Ethanol is an important basic chemical raw material used in the manufacture of acetaldehyde, ethylenediene, ethylamine, ethyl acetate, acetic acid, ethyl chloride, etc., and is derived from medicines, dyes, coatings, fragrances, synthetic rubber, detergents, Many intermediates of pesticides and other products have more than 300 kinds of