Polystyrene production methods are very important; Because this material is known as the sixth most widely used polymer in the world. This chemical is a kind of aromatic polymer whose first stage of production is the use of styrene monomer. This polymer is a kind of thermoplastic material that is converted into solid and foam by extrusion processes. Naturally, polystyrenes are used to make plastics. In advanced cases, these materials can be used in other industries. In the continuation of this PetroPtoviders article, join us to show you Polystyrene production methods.

Importance of recognizing Polystyrene production methods

PS Products

PS Products

Why do we need to know Polystyrene production methods !? The answer is: knowing how the material is produced will increase the efficiency of the reactions. It also saves on polymer production costs. In addition, knowing the methods of producing polymers will cause less pollution. It also speeds up the production of polymers.

In general, making polystyrene is simple! Styrene monomer is first combined with ethylene. This causes the substance to have an alkyl substitution. Then, the dehydrogenation step is performed and various catalysts are added to the reaction. These catalysts include silica, phosphoric acid, alumina, and aluminum chloride. These catalysts increase the reaction rate and increase the efficiency of polymer production.

To make polystyrene, benzene is first combined with ethylene. This causes the polystyrene material to be dehydrogenated after the reaction. In the process of polystyrene production methods, the presence of oxygen is required. The catalyst that enters the reaction must also be oxidizable. This eliminates free radicals that are harmful to human health.

The structure of polystyrene is generally related to the category of vinyl. It has a long hydrocarbon chain attached to phenyl carbon atoms. The atoms of this compound are bonded together by a Wonder Waltz bond. Thousands of molecules come together to form a strong polystyrene bond.

The first method of producing polystyrenes: the process of massification

One of the best and most effective methods for the proper production of polystyrene is the use of the bulk method. In this method, styrene monomers are heated. Then, the reaction initiator (usually benzoyl peroxide) is introduced into the reaction. It should be noted that at this stage, no solvent should be added to the reaction.

This method of producing PS has many advantages. It should be noted that this method also has disadvantages. For example, it is difficult to separate the polymer from the reactor or balloon in this way. It is also difficult to remove polystyrene and dissipate heat in the device.

The second method of producing polystyrenes: suspension polymerization

In this method, a catalyst is introduced into the monomer and then dissolved in water. To make the reaction stable in this method, another suspending agent is introduced into the reaction. Various materials are reacted in this way to improve the polystyrene production process. These substances are pectins along with cellulose, which reacts with gelatin, polyvinyl alcohol, and polyacrylic acid.

Sometimes, in this method of producing polystyrene, inorganic materials are used for suspension. These materials include phosphates, magnesium silicates, kaolin, aluminum hydroxide, and zinc oxide.

Making polystyrene by suspension is known as an art! Because in this method, in addition to considering the scientific conditions of the reaction, the art of experts is also measured. In this method, the polymer shear distribution must be measured. This should fit the design of the reactor. This causes the size of the polystyrene particles produced to be different.

Another important factor influencing the particle size of the polymer is the suitability of the monomer with the solvent or water. In addition, the thermal reaction and the type of starting material, and the amount of material used affect the size of the polymer.

To make polymers with large particles, a single split must be made to make polystyrene. This reaction is performed with a special fan that causes the suspension polymerization of the grains. In addition, there is another method that uses ultrasonic beams to produce large polymers.

Finally, shaping polystyrene

One of the most important parts of polystyrene production is shaping it. This process is usually done by injection. But there are other ways to shape polystyrene; Because this polymer is very flexible.

Polystyrenes are resistant to a variety of materials. For example, polystyrene is resistant to salts, alcohols, alkalis, and alkalis. According to the FDA standard, the production process of polystyrenes is in two stages. First, the polymer is heated to 80 ° C. Then, it is heated to about 100 to 180 degrees Celsius.

It is interesting to know that almost 12% of the plastics in the world are made of polystyrene. These materials soften to 90 ° C and are heated to 180 to 250 ° C for melting.

Summary of Polystyrene production methods review

shaping polystyrene

shaping polystyrene

In this article, we saw Polystyrene production methods. As mentioned, polystyrenes have a regular and good structure. These materials are made to make different plastics. In addition, there are several methods for making polystyrene, which we discussed in this article. The production of polystyrene has standards set by the FDA. These standards produce durable, high-quality polystyrene.

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