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What are the types and structures of rubber materials? Release time:2018-02-09 07:50:04

1) natural rubber: the rubber tree is made of latex and is a polymer of isoprene. Abrasion resistance, high elasticity, tensile strength and elongation is very good. It is easy to be aging in the air, and when it is hot and sticky, it is easy to expand and dissolve in mineral oil or gasoline. It is resistant to alkali but not strong acid. Advantages: good elasticity, acid and alkali resistance. Is the production of adhesive tape, rubber hose, rubber material, and is suitable for the production of damping parts, brake products using oil and ethanol in the liquid with hydroxyl in the car.
 
2) styrene butadiene rubber: a copolymer of butadiene and styrene. Compared with natural rubber, it has uniform quality, less foreign matter, better abrasion resistance and aging resistance, but less mechanical strength. It can be mixed with natural rubber. Non - oily material advantages: low cost, good water resistance, hardness below 70 with good elasticity, high hardness with poor compressibility, widely used in tire industry, shoes, cloth and conveyor belt industry etc..
 
Ding Ji: 3) and a small amount of isobutylene isoprene rubber polymerization, due to steric hindrance of the methyl molecular motion than other polymers, so the gas permeability less, resistance to heat, sunlight, ozone, good electrical insulation; for polar solvent resistance, the general use of the temperature range of -54-110 DEG C. Advantages: for most of the general gas with permeability, resistance to sunlight and smell good to be exposed to animal or vegetable oil or chemical gasifiable in. The inner tube, leather bag, rubber ointment paper, window frame rubber, steam hose, heat resistant conveyor belt, etc. for automobile tires
 
4) hydrogenated butyl rubber: hydrogenated butadiene clear gum is used to remove some double strands after hydrogenation. The hydrogenation temperature and weatherability are much higher than that of general butyl rubber, and its oil resistance is similar to that of general butyl rubber. The general use temperature range is -25~150 C. Advantages: compared with Buqing gum, it has better antiwear property, excellent corrosion resistance, tensile resistance, tear resistance and compressibility, and is well resistant to ozone and other atmospheric conditions. It is generally suitable for washing or washing dishes. It is widely used in environmental cold medium R134a system seal.
 
5) Yi Bingjiao: ethylene and Propylene Copolymerization, so heat resistance, aging resistance, ozone resistance and stability are excellent, but sulfur and sulfur are not available. In order to solve this problem, a small amount of third elements with double chain is introduced on the main chain of EP and the addition of sulfur is EPDM, and the general use temperature is -50~150 C. The resistance to polar solvents such as alcohols and ketones is excellent. Advantages: good weather resistance and ozone resistance, excellent water resistance and anti chemical properties. It can use alcohols and ketones, high temperature steam and good gas permeability. Sealing parts or parts of the sealing parts of the sealing parts of the high temperature water vapor environment. The rubber parts in the brake (brake) system. A seal in a radiator (a car water tank).
 
6) Ding Qingjiao: the copolymerization of acrylonitrile and butadiene, the higher the content of acrylonitrile from 18%~50% and the content of acrylonitrile, the better the resistance to hydrocarbon fuel oil of petrochemical industry, but the low temperature performance is worse. The temperature range is generally -25~100 degrees. Ding Qingjiao is one of the most commonly used rubber used in oil seal and O ring now. It has good resistance to oil, water, solvent and high pressure oil, and has good compression, abrasion and elongation. It is used for making fuel tank, lubricating oil tank and rubber parts used in petroleum fluid, gasoline, water, silicone oil, two ester lubricating oil and other fluid media, especially for sealing parts. It is said to be the most widely used rubber seal with the lowest cost.
 
7) chloroprene rubber: polymerized by the monomer of chloro butylene.  The vulcanized rubber has good elasticity and abrasion resistance. It is not afraid of direct exposure to sunlight. It has excellent weather resistance. It is not afraid of intense distortion. It is not afraid of refrigerant, dilute acid and silicon ester lubricating oil, but it is not resistant to phosphate ester hydraulic oil. At low temperature, it is easy to crystallize and harden, and the storage stability is poor, and the expansion amount is large in the mineral oil with low aniline point. The general use temperature range is -50~150 C. Advantages: good elasticity and good compression deformation, without sulphur in the formula, so it is very easy to make. It has the characteristics of anti animal and vegetable oil, and will not affect the physical properties of neutral chemicals, fat, fat, oil, and solvents, and it has the characteristics of anti combustion. It is suitable for making all kinds of parts that are directly exposed to air, sunlight and ozone. It is suitable for various kinds of rubber products that are resistant to combustion and chemical corrosion.
 
Rubber: latex from plants, such as rubber trees, rubber grass and other plants, made of elastic, insulating, impervious and air materials. A high elastic polymer. It is divided into two kinds of natural rubber and synthetic rubber. Natural rubber is made from rubber tree, rubber grass and other plants, and the synthetic rubber is obtained by polymerization of various monomers. Rubber products are widely used in all aspects of industry and life.
 
The structure of rubber
 
Linear structure: the general structure of the non vulcanized rubber. Because of the large molecular weight, there is a fine mass without external force. When the external force acts and the external force is removed, the entanglement degree of the fine cluster changes, the molecular chain rebounding and a strong recovery tendency, which is the origin of the high elasticity of rubber.
 
Chain structure: the cluster of branched chains of large rubber chains, forming gelatin. The gel has adverse effects on the performance and processing of rubber. In the process of gelation, all kinds of agents can not get into the gel zone, forming a local blank, forming no reinforcement and crosslinking, and becoming the weak part of the product.
 
Cross linked structure: linear molecular pass