Are there any seniors who know about silicone?

1. Performance of organic silicone The basic structural unit (ie, main chain) of organic silicone products is composed of silicon-oxygen links, and the side chains are connected to various other organic groups through silicon atoms. Therefore, the structure of silicone products contains both "organic groups" and "inorganic structures". This special composition and molecular structure allows it to combine the characteristics of organic matter with the functions of inorganic matter. It has many excellent properties such as high and low temperature resistance, weather aging resistance, electrical insulation, ozone resistance, hydrophobicity, flame retardant, non-toxic, non-corrosive and physiological inertness. Some varieties are also oil-resistant, solvent-resistant and radiation-resistant. Compared with other polymer materials, the most outstanding properties of silicone products are excellent temperature resistance, dielectric properties, weather resistance, physiological inertness and low surface tension. 1． Most polymer materials with average temperature resistance have carbon-carbon (C-C) bonds as the main chain structure, such as plastics, rubber, chemical fibers, etc., while silicone products have silicon-oxygen (Si-O) bonds as the main chain structure, with C-C bonds The bond energy is 82.6 kcal/g molecule, and the bond energy of the Si-O bond in silicone is 121 kcal/g molecule. Therefore, the thermal stability of silicone products is high, and the chemical bonds of the molecules will not break or decompose under high temperatures (or radiation exposure). Silicone is not only resistant to high temperatures, but also to low temperatures and can be used in a wide temperature range. Whether it is chemical properties or physical and mechanical properties, the changes with temperature are very small, which is also related to the easily flexible helical structure of silicone molecules. 2． The main chain of weather-resistant silicone products is -Si-O-, and there are no double bonds, so it is not easily decomposed by ultraviolet light and ozone. In silicone products, the chain length of Si-O bonds is approximately one and a half times the chain length of C-C bonds. The longer chain length gives silicone better thermal stability and radiation and weather resistance than other polymer materials. The service life of silicone in natural environments can reach decades. 3． Electrical insulation properties Silicone products all have good electrical insulation properties. Their dielectric loss, voltage resistance, arc resistance, corona resistance, volume resistivity and surface resistivity are among the best among insulating materials, and their electrical properties are very little affected by temperature and frequency. Therefore, they are stable electrical insulating materials and are widely used in the electronic and electrical industries. In addition to excellent heat resistance, silicone also has excellent water repellency, which guarantees the high reliability of electrical equipment when used in wet conditions. 4． Physiologically inert silicones are among the most inactive compounds known. They are very resistant to biological aging, have no rejection reaction with animal bodies, and have good anticoagulant properties. 5. The backbone of low surface tension and low surface energy silicones is very flexible. This excellent flexibility is due to the basic geometric molecular configuration. Because the intermolecular force is much weaker than that of hydrocarbons, it has lower viscosity, weaker surface tension, smaller surface energy, and stronger film-forming ability than hydrocarbons of the same molecular weight. This low surface tension and low surface energy are the main reasons why it has many applications: It has excellent properties such as hydrophobicity, defoaming, foam stabilization, anti-sticking, lubrication, and glazing. 2. Classification of organic silicones Organic silicones are mainly divided into four categories: silicone oil, silicone rubber, silicone resin and silane coupling agent. 3. Uses of organic silicon Since organic silicon has the above-mentioned excellent properties, its application range is very wide. It not only serves as an aviation, cutting-edge technology, * * Special materials are used in technical sectors, but also in various sectors of the national economy, and their application scope has expanded to: Construction, electronic and electrical, textile, automobile, machinery, leather and paper making, chemical and light industry, metal and paint, medicine and medical treatment, etc. The main applications of silicone oil and its derivatives are: Release agents, shock absorbing oils, dielectric oils, hydraulic oils, heat transfer oils, diffusion pump oils, defoaming agents, lubricants, hydrophobic agents, paint additives, polishing agents, additives for cosmetics and daily necessities, surfactants, particle and fiber treatment agents, silicone grease, flocculants. Silicone rubber is divided into room temperature vulcanized silicone rubber and high temperature vulcanized silicone rubber. The former is mainly used in: Sealants, adhesives, conformal coatings, gaskets, foam rubber, molded parts, encapsulation materials, electrical insulation, glazing, medical implants, surgical aids, molding materials ； The latter is mainly used in: Pipes and hoses, strips, wire and cable insulation, surgical aids, flame retardant rubber parts, penetration sealing materials, molded parts, embossing rollers, automotive ignition cables and spark plug covers, extruded parts, medical implants, laminates, conductive rubber, fiber coatings, foam rubber. The main applications of silicone are: Varnishes, insulating varnishes, molding compounds, protective coatings, potting materials, joint coatings, pressure sensitive adhesives, laminating resins, release agents, adhesives, masonry waterproofing agents. Silane coupling agents are mainly used in paints, plastic rubber processing, and adhesives. Silicone can not only be widely used as a basic material and structural material in some large industries, but also can be used as an auxiliary or auxiliary material to share with other materials or improve the process performance of other materials. 4. Organic silicone monomers The raw materials for preparing silicone oil, silicone rubber, silicone resin and silane coupling agents are various organic silicone monomers. Thousands of organic silicone products can be produced from several basic monomers. Silicone monomers mainly include: Methyl chlorosilane (referred to as methyl monomer), phenyl chlorosilane (referred to as phenyl monomer), methyl vinyl chlorosilane, ethyl trichlorosilane, propyl trichlorosilane, vinyl trichlorosilane, γ-chloropropyl trichlorosilane and fluorosilicone monomer, etc. Among them, methylchlorosilane is the most important, accounting for more than 90% of the total monomer, followed by phenylchlorosilane. The key to the development of any polymer material lies in the development of monomer technology. The silicone industry is characterized by centralized monomer production and decentralized product processing. Therefore, monomer production plays an important role in the silicone industry, and the production level of monomers directly reflects the development level of the silicone industry. 5. Silicone polymer 1. Polyorganosiloxane Polyorganosiloxane is the most important silicone polymer, and most of the silicone products currently on the market belong to this form. Chain polyorganosiloxane with unit structure R2SiO is often called silicone. Polyorganosiloxanes can be roughly divided into two types: long chain structures and complex cross-linked structures. Silicone oil and silicone rubber belong to the former, and silicone paint belongs to the latter. In addition, polyorganosiloxanes can also be classified according to the organic groups on the silicon. In most cases, they can be called methyl polyorganosiloxane (unit structure Me2SiO), phenyl polyorganosiloxane (unit structure Ph2SiO, PhSiO3/2) and hydrogen-containing polyorganosiloxane (unit structure MeHSiO). 2． Polyorganoalkyl (aryl)siloxane is a polymer containing a benzene (phenylene) group in the siloxane chain segment. Its thermal stability is more than 100°C higher than that of polydimethylsiloxane, which is of special significance. 3． Polysilosane 4. Polysilazane 5. Carbon-based polymers containing silicon in side training groups

I have done toughening and modification of silicone and modification of nano-silica. Since you are new to this industry, I suggest you take a look at silicone products first. The introduction to silicone products in the book is quite detailed, including the types of silicone and their preparation methods. I used to go to the bookstore to read it, but I did not buy it myself. I suggest you go directly to the bookstore to buy a copy and study it carefully! :lol

If you have any difficulties, please ask me. "Production-related issues"``

Some of the more classic books are: Organic silicon synthesis process and product application Xing Song * * ed. Since there are many applications for silicones, such as the production of silanes and silicone emulsions, there is not much difference, so it is best to understand the specific uses first. This is a relatively famous website for silicones.: http://www.chinasilicon.net/

Our company is working on a silicone project. I don’t know what the poster wants to know.

:) :lol You can ask your questions and we will help you solve them! ! !

We also produce silicone resin. If you have any questions, you can discuss them -

I have just entered the silicone industry, and I have a few questions for you silicone experts. In the water splitting process, the materials after each stage of reaction must enter the phase separator. Some of these phase separators have a water injection port. What I don’t understand is what are these water injection ports used for? When to use it? What role does it play? Why do some phase separators have them and some don't? :handshake

Why haven’t any silicone colleagues paid attention to the forum recently? Why haven't I seen anyone replying to this question for so many days?

This question can’t be answered in one sentence. If you have any questions, ask via QQ or call QQ181808061. I have been working in the silicone industry for several years, but I am not an expert.

It should be that some processes require washing, while others only require standing and layering.

Graduation* I worked in a silicone company for a few months and learned a little bit about it. There are many kinds of silicone products. I suggest you buy a book on silicone!

Let’s learn together* Ah, I don’t have a job yet. How is this industry developing?

I have just started working and am currently working on a polysilicon project. I feel it is a relatively good project, and organic silicon is more promising!

Silicone and polysilicon are two different things.

There are many types of silicones, can you be more specific? My MSN: wh-nb@live.cn . Add me to communicate

Methyl chlorosilane (collectively referred to as silicone) is an organic silicon monomer. It is a new functional chemical material with excellent and unique properties. The products have various forms and varieties. Its application has penetrated into various fields of national defense industry, national economy and even people's daily life. It is called "industrial monosodium glutamate". At the same time, organic silicon is a technology-intensive, capital-intensive, and high-value-added industry. In the past thirty years, the world's organic silicon industry has maintained a growth rate several times higher than GDP. In the past ten years, my country's average annual consumption growth rate of organic silicon has been as high as 28%. Organosilicon polymer derived from methylchlorosilane is a new polymer synthetic material with dual characteristics of organic materials and inorganic materials. With its excellent comprehensive properties, organosilicon materials are widely used in various fields of the national economy such as national defense, aerospace, electronics and electrical, construction, machinery, metallurgy, automobiles, instrumentation, textiles, chemical industry, light industry, food, medicine and health, etc., and have become indispensable and important materials in modern science and technology and daily life. Silicone production technology is complex, engineering is difficult, and there are many related industries supporting it. Therefore, the development of organic silicone not only provides the market with new high-performance chemical materials, but also drives the development of related industries such as materials, machinery manufacturing, automated instruments, and chemical reagents. It can be said that whether the organic silicone industry is developed or not is a measure of a * * One of the symbols of comprehensive national strength. Due to the large capital investment, long process flow and high technical difficulty in the production of methylchlorosilane, the production level and equipment scale of silicone monomers are a measure of * * An important basis for the technical level of silicone. Organic silicon is a capital-intensive, technology-intensive, high-value-added fine chemical product. The high-tech future of society is inseparable from organic silicon materials. In view of the important position of silicone materials in the national economy, developed countries * * Taking the development of organic silicon materials as the focus of new materials, Japan has listed the development of organic silicon as a key technology to grasp the high-tech industry in the 21st century and identified it as a relationship * * The “next generation plan” for big things. The State Council of my country has also listed silicone monomers in the "Current * * Catalog of industries, products and economies to be focused on encouraged development (August 2008) to encourage domestic and foreign investors to invest in the construction of silicone production equipment and promote the development of my country's silicone industry. Compared with other industries, silicone is special. Monomer production is highly concentrated, while downstream product production is very dispersed. The United States, Germany, Britain, France, Japan and a few other developed countries * * The production capacity of methyl monomer accounts for more than 80% of the world's total production capacity, and the world's silicone market is almost monopolized by them. The advantages of centralized production, advanced technology, numerous brands, and large scale make its silicone products highly competitive in the world market. According to reports, the current sales of silicone products in the world have exceeded 8 billion US dollars, with more than 10,000 product varieties and brands, and more than 4,000 commonly used ones. The production of silicone monomers in my country began in the 1950s, and its products are mainly used in the military industry. After the 1980s, with the rapid development of the national economy, the application of silicone materials has been rapidly promoted in various industries, and their usage has continued to increase. Although my country's silicone monomer production has increased at an average rate of 36% in the past decade, it is still far from meeting the needs of the domestic market. A large amount of basic polymers and semi-finished products need to be imported every year to alleviate the contradiction between market supply and demand. After the completion of this project, it will be one of the largest silicone monomer production facilities in China, even in developed countries in the West. * * It is also an economical scale.

What is the difference between silicone and polycrystalline silicon?/

Does anyone have any experience with which silicone resin or silane coupling agent has better adhesion to Ni?