-
Styrene is an organic compound formed by replacing a hydrogen atom of ethylene with benzene, the molecular formula is C8H8, the electrons of vinyl are conjugated with benzene ring, insoluble in water, soluble in ethanol and ether, and gradually polymerized and oxidized when exposed to air. Industrially, it is an important monomer for synthetic resins, ion exchange resins and synthetic rubber.
Under the action of the catalyst, ethylbenzene is dehydrogenated to form styrene when it reaches 550 600, and the dehydrogenation of ethylbenzene is a reversible endothermic molecular reaction, and the heating and decompression are conducive to the reaction in the direction of styrene generation. The method used in industry is to mix a large amount of high-temperature water vapor into the feed to reduce the partial pressure of hydrocarbons and provide part of the heat required for the reaction, and the molar ratio of water vapor to hydrocarbons (referred to as water ratio) varies depending on the type of reactor, ranging from about 6 14.
-
Styrene, also known as: vinylbenzene.
According to the nomenclature of organic compounds, the halogenated compounds and alkyl substitutes of benzene are first called the position number and name of the substituent, and then the word "benzene" is added. The word "base" of simple alkyl groups such as methyl group and ethyl group can be omitted. Benzene alkenes, alkynes, alcohols, aldehydes, ketones, carboxylic acids, sulfonic acids, amine substitutes, etc., take the prototype of the substituent as the parent, first call "benzene" to represent the phenyl group, and then call the prototype of the substituent, the substituent is the main chain when numbering, the benzene ring is the branch chain, and the carbon connected with the substituent is the No. 1 carbon.
The alkenyl substitute of styrene is called "benzene" to represent the phenyl group, and then the original form of the substituent, so it is called styrene grinding and searching, and it cannot be called ethylene benzene.
-
As a monomer of synthetic rubber and plastics, it is used to produce styrene-butadiene rubber, polystyrene and styrofoam. Copolymerization with other monomers to make engineering plastics for a variety of different purposes. It is mainly used in the manufacture of audio and video products and optical disc disk boxes, lamps and interior decoration parts, and high-frequency electrical insulation parts.
Train vehicle parts, automobile parts, marine plastic parts, telecommunications electrical parts and building materials. <
1. As a monomer of synthetic rubber and plastic, it is used to produce styrene-butadiene rubber, polystyrene and foamed polystyrene.
2. Copolymerization with other monomers to manufacture a variety of engineering plastics for different purposes.
3. Mainly used in the manufacture of audio and video products, optical disc disk boxes, lamps and interior decoration parts, and high-frequency electrical insulation parts;
4. Train vehicle parts, auto parts, marine plastic parts, telecommunications electrical parts and building materials;
5. It can be used to process and make films, wire and cable sheaths, pipes, various hollow products, injection molding products, fibers, etc., which are widely used in agriculture, packaging, automobile and other industries.
It is an important raw material for the manufacture of plastics.
Pure polystyrene plastic foam board is non-toxic, and polystyrene plastic foam fast food box is not toxic, but the requirement is pure polystyrene. However, polystyrene plastic foam board needs to add plastic additives to improve some properties of polystyrene plastic foam board. Additives are not necessarily guaranteed to be non-toxic. >>>More
Polystyrene foam is not toxic, but many polystyrene foam boards are waste plastics or have additives, so there is no guarantee that they are not toxic. >>>More
Polyethylene is non-toxic. Polyethylene is a white waxy translucent material, flexible and tough, lighter than water, non-toxic, and has superior dielectric properties. It is flammable and continues to burn after leaving the fire. The water permeability is low, and the permeability to organic steam is larger. >>>More