What are the main uses of Vinyltrichlorosilane?
Vinyl trichlorosilane is also a silicone compound. It has a wide range of uses and has important applications in various fields of chemical industry.
The primary use is to synthesize silicone polymers. By copolymerizing with other monomers, polymer materials with special properties can be prepared. These materials have made great contributions to coatings, adhesives, sealants and other industries. In coatings, it can increase the adhesion, wear resistance and chemical corrosion resistance of coatings. When coatings are applied to the surface of objects, the structure formed by vinyl trichlorosilane can be tightly attached to objects and resist external erosion, so that the surface of the object remains in good condition for a long time.
Furthermore, in the field of composite materials, vinyl trichlorosilane is used as a coupling agent. Composite materials are composed of different materials, and the bonding force between their components affects the material properties. Vinyl trichlorosilane can bridge the interface between different materials to enhance the interfacial bonding force. For example, in glass fiber reinforced plastics, one end reacts with the hydroxyl group on the surface of the glass fiber, and the other end reacts with the plastic matrix, so that the glass fiber and the plastic are closely connected to improve the strength and toughness of the composite material.
It also has its uses in the semiconductor and electronics industries. It can be used as a surface treatment agent to modify the surface of semiconductor materials such as silicon wafers. Improving the wettability and adhesion of the material surface is helpful for subsequent photolithography, etching and other processes to improve the performance and reliability of electronic devices.
In addition, vinyl trichlorosilane is a key raw material in the preparation of silicone intermediates. Through a series of chemical reactions, a variety of silicone compounds can be derived, expanding the variety of silicone products to meet the diverse needs of different industries.
What are the physical properties of Vinyltrichlorosilane?
Vinyl trichlorosilane is one of the organosilicon compounds. Its physical properties are unique and can be described in detail.
Under normal temperature and pressure, vinyl trichlorosilane is a colorless and transparent liquid with clear texture and good visibility. Its smell is relatively pungent, and you can feel a strong pungent smell when you smell it. This smell can often be used as the basis for preliminary identification.
When it comes to volatility, vinyl trichlorosilane has strong volatility. The intermolecular force is relatively weak, so that under certain temperature conditions, the molecules are easy to break free from the shackles of the liquid surface and escape into the gas phase. Due to its high volatility, special attention should be paid during use and storage to prevent its rapid volatilization from causing safety and many other problems.
The boiling point is about 90 ° C. When heated to this temperature, vinyl trichlorosilane changes from liquid to gaseous state. This boiling point characteristic has important reference value in the temperature control of separation, purification and related chemical reactions.
The density is slightly larger than that of water, about 1.26g/cm ³. This density characteristic makes vinyl trichlorosilane sink to the bottom if mixed with water. This phenomenon cannot be ignored when dealing with its water-related systems.
In terms of solubility, vinyl trichlorosilane is insoluble in water. Due to its molecular structure, the presence of silicone-chlorine bonds and vinyl groups makes it hydrophobic. However, it is soluble in many organic solvents, such as ether, toluene, acetone, etc. In the field of organic synthesis, this solubility property provides a variety of possibilities for the selection of reaction media, which is convenient for it to participate in various organic reactions.
And because its molecules contain active silicone-chlorine bonds, the chemical properties are relatively active, and it is easy to hydrolyze in contact with water, resulting in hydrogen chloride gas and corresponding silanol or polysiloxane products. This hydrolysis reaction is very fast, and hydrogen chloride gas is corrosive, so when storing and using, it is necessary to avoid water and moisture to ensure its chemical stability and safety in use.
Vinyltrichlorosilane to pay attention to when storing and transporting
Vinyl trichlorosilane is also a chemical substance. When storing and transporting it, many matters must not be ignored.
When storing, the first environment. It must be placed in a cool, dry and well-ventilated place, away from fire and heat sources, to prevent it from being heated and causing disaster. Temperature should be carefully controlled, not too high. Cover vinyl trichlorosilane is active, under high temperature, or cause abnormal reactions, endangering safety.
Furthermore, it is corrosive, so the storage device should be made of corrosion-resistant materials. Such as glass, ceramics, etc., it is necessary to pay attention that glass encounters strong alkalis or reacts, so the selection of materials must be cautious. And the storage place should be separated from oxidants, alkalis and other substances to avoid their interaction and cause danger.
As for transportation, the packaging must be tight. The container used should be sturdy to prevent collision damage. Transportation vehicles also need to choose suitable ones, equipped with fire extinguishing, leakage emergency treatment and other equipment. During driving, drivers should be careful to avoid bumps and emergency brakes to ensure the stability of the goods. Transportation personnel should also be aware of its characteristics, and in case of emergencies, they can properly deal with it.
And vinyl trichlorosilane is easy to react in contact with water, so whether it is stored or transported, it must be strictly prevented from contact with water. When transporting in rainy days, more attention should be paid to protection. If you accidentally leak, you should quickly dispose of it according to emergency methods, so as not to spread the harm.
What is the preparation method of Vinyltrichlorosilane?
Vinyl trichlorosilane, the method of making it, although it has not been heard of in ancient times, but today's chemical technology can be obtained.
First take ethylene, and trichlorosilane, with the help of a catalyst, into the reaction kettle. This catalyst is often a complex of platinum group metals, such as the isopropanol solution of chloroplatinic acid, which can promote the addition reaction of the two. The temperature in the control kettle is between fifty and eighty degrees Celsius, and the pressure is slightly increased to two or three atmospheres. Under this condition, the double bonds of ethylene are opened, and the hydrogen and silicon atoms of trichlorosilane are combined to obtain vinyl trichlorosilane. The corresponding formula is as follows: $CH_ {2} = CH_ {2} + HSiCl_ {3}\ stackrel {catalyst} {\ longrightarrow} CH_ {2} = CHSiCl_ {3} $.
After the reaction is completed, the product is mixed with unprepared raw materials, by-products, etc. Then purified by distillation, in the distillation tower, according to the boiling point of each substance, separated to obtain pure vinyltrichlorosilane. Its boiling point is about 90 degrees Celsius. By distillation, impurities can be removed to obtain high-purity products for use in chemical industries.
Vinyltrichlorosilane impact on the environment and human body
Vinyltrichlorosilane is a kind of organosilicon compound. This substance is widely used in industry, but it also has some effects on the environment and human body.
In terms of environmental impact, vinyltrichlorosilane is toxic. If released into the atmosphere, it can react with water in the air to form hydrogen chloride gas. This gas is corrosive and will not only damage vegetation, but also pollute the atmospheric environment. If it flows into water bodies, it will change the chemical properties of water bodies, affect the living environment of aquatic organisms, or cause the death of aquatic organisms, and destroy the ecological balance of water. Its residue in the soil may affect the activity of soil microorganisms, which in turn affects soil fertility and plant growth.
As for the effects on the human body, vinyl trichlorosilane is irritating. If it comes into contact with the skin, it can cause redness, swelling, pain, and in severe cases, chemical burns. If it is not accidentally entered into the eyes, it will cause great damage to the eyes, or damage the vision. Inhalation of its volatile gas can irritate the respiratory tract, causing symptoms such as cough and asthma. Long-term inhalation may cause irreversible damage to the lungs and other respiratory organs. And this substance may be allergenic, and some people may have allergic reactions after exposure.
Therefore, when using vinyl trichlorosilane, it is necessary to take proper protective measures to reduce its adverse effects on the environment and human body.