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Organic polymer materials industry has great development potential

Edit: Ccdanni 2020-01-24 Mobile

  Organic polymer materials are also called polymers or polymers. One type consists of one or several molecules or molecular groups (structural units or monomers) covalently bonded to form a macromolecule with multiple repeating monomer units, and its molecular weight is as high as 104-106. They can be natural products such as fibers, proteins, and natural rubber, or they can be made by synthetic methods, such as non-biopolymers such as synthetic rubber, synthetic resins, and synthetic fibers. Polymers are characterized by many types and low density (only 1/7 to 1/8 of steel), high specific strength, good electrical insulation and corrosion resistance, easy processing, and can meet the requirements of many special applications, including Plastics, fibers, rubber, coatings, adhesives and other fields can partially replace metal and non-metallic materials.

  Macromolecules refer to a class of organic compounds with a relatively large molecular mass, which can reach thousands or even millions. They are structurally composed of many simple and identical structural units called chain links (monomers), which are repeatedly connected through chemical bonds. Macromolecules are also called polymers or polymers.

  Organic polymer materials are based on polymer compounds, mixed with various additives (or compounding agents), and processed through appropriate processing. The basic properties of materials are mainly determined by polymer compounds. Organic polymer materials have the following basic characteristics:

  1. Low density-much lighter than steel and copper, equivalent to aluminum and magnesium, which is beneficial to the lightweight of mechanical and electrical products.

  2. Sufficient strength and modulus-can replace a variety of metal materials to manufacture a variety of mechanical parts.

  3. Excellent electrical (insulation) performance-plays an important role in promoting insulation in motors, electrical appliances, instruments, wires and cables. And adding appropriate conductive materials can become special conductor materials.

  4. Excellent anti-friction, wear resistance and self-lubricating properties-many polymer materials can be run in liquid media with or without oil and dry friction without oil, and their performance is even better than metal.

  5. Excellent corrosion resistance-generally has good corrosion resistance to acids, alkalis or certain chemicals. In some special media, such as chloride-containing acidic media. Its corrosion resistance is better than metal and even better than ordinary stainless steel.

  6, full of adhesion-polymer adhesives can glue different types and different shapes of material parts together, the glue is firm, and it has the function of sealing and plugging.

  7, easy alloying-two or more polymers can be blended with physical and chemical methods to obtain a blended polymer alloy. Such as nylon and polyolefin blended plastic alloy, its impact toughness can be increased by more than 15 times. Polymer alloying increases the freedom of material modification, and can prepare new materials with various properties and adapting to different working conditions.

  8, full of elasticity-whether it is linear or bulk polymer, has a certain degree of elasticity. Rubber has the best elasticity, and has good vibration absorption, anti-vibration and sealing functions.

  9, excellent light transmission-many plastics are transparent, such as plexiglass, polystyrene light transmission rate of more than 90%. Many polymers also have excellent heat insulation and sound insulation properties, making them good lightweight construction materials.

  10, poor heat resistance-long-term use temperature is mostly below 200 ℃. In recent years, varieties that can be used above 200 ° C have increased; those used at temperatures between 300 and 4000 ° C are the goals pursued. However, some polymer materials can withstand ultra-low temperatures such as liquid nitrogen and liquid helium.

  11. Combustible-polymer materials are organic materials, which are flammable or self-extinguishing from fire; flame retardants are usually added to eliminate their flammability.

  12, easy to aging-During the long-term action of heat, light and oxygen, the polymer undergoes degradation, which reduces its physical and chemical properties and mechanical properties. Completely disappeared and even lost its use value. For this reason, it is often necessary to add anti-aging agents and other protective measures to extend the service life.

  Organic polymer materials have some unique processing properties, such as good high elasticity, abrasion resistance, chemical stability, etc. These processing properties provide the possibility for organic polymer materials to apply a variety of processing technologies. An important reason for its widespread use.

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