Sixteen kinds of rubber introduction and common rubber products testing standards!

1, Natural rubber (NR)

It is mainly rubber hydrocarbon (polyisoprene), containing a small amount of protein, water, resin acid, sugar and inorganic salt. High elasticity, high tensile strength, excellent tear resistance and electrical insulation, good wear resistance and drought resistance, good workability, easy to bond with other materials, superior to most synthetic rubber in terms of comprehensive properties. The disadvantage is poor oxygen resistance and ozone resistance, easy to aging deterioration; Oil and solvent resistance is not good, acid and alkali corrosion resistance is low; The heat resistance is not high. Operating temperature range: about -60℃~+80℃. Manufacture tires, rubber shoes, rubber hose, tape, wire and cable insulation and jacket and other general products. Especially suitable for the manufacture of torsional vibration eliminators, engine shock absorbers, machine supports, rubber-metal suspension elements, diaphragm, molded products.

2, styrene butadiene rubber (SBR)

A copolymer of butadiene and styrene. The performance is close to natural rubber, is the largest production of general synthetic rubber, which is characterized by wear resistance, aging resistance and heat resistance than natural rubber, the texture is also more uniform than natural rubber. The disadvantages are: low elasticity, poor resistance to flexure and tear; Poor processing performance, especially poor self-viscosity, low rubber strength. Operating temperature range: about -50℃~+100℃. It is mainly used to replace natural rubber to make tires, rubber plates, rubber hoses, rubber shoes and other general products.

3, Butadiene rubber (BR)

It is a cis-structured rubber polymerized from butadiene. The advantages are: excellent elasticity and wear resistance, good aging resistance, excellent low temperature resistance, low heat under dynamic load, easy metal bonding. The disadvantages are low strength, poor tear resistance, poor processing performance and self-viscosity. Operating temperature range: about -60℃~+100℃. Generally, it is used with natural rubber or styrene butadiene rubber, mainly making tire tread, transport belt and special cold-resistant products.

4, isoamyl rubber (IR)

It is a cis-structured rubber polymerized from isoprene monomer. The chemical composition and three-dimensional structure are similar to natural rubber, and the performance is also very close to natural rubber, so it is called synthetic natural rubber. It has most of the advantages of natural rubber, aging resistance due to natural rubber, the elasticity and strength are slightly lower than natural rubber, poor processing performance, high cost. Use temperature range: about -50℃~+100℃ can replace natural rubber to make tires, rubber shoes, hose, tape and other general products.

5, neoprene rubber (CR)

It is a polymer made from chloroprene as a monomer emulsion polymerization. This rubber molecule contains chlorine atoms, so compared with other general purpose rubber: it has excellent oxygen resistance, ozone resistance, non-flammable, self-extinguishing after fire, oil resistance, solvent resistance, acid and alkali resistance, aging resistance, good air tightness and other advantages; Its physical and mechanical properties are also better than natural rubber, so it can be used as general rubber and special rubber. The main disadvantages are poor cold resistance, large proportion, high relative cost, poor electrical insulation, easy to stick rolling, easy to burn and easy to stick mold during processing. In addition, raw rubber stability is poor, not easy to save. Operating temperature range: about -45℃~+100℃. It is mainly used in the manufacture of cable sheaths and various protective sleeves and protective covers requiring high ozone resistance and aging resistance; Oil and chemical resistant hose, tape and chemical lining; Inflammable underground mining rubber products, as well as various molded products, sealing rings, pads, binders, etc.

6, butyl rubber (IIR)

It is a copolymer of isobutylene and a small amount of isoprene or butadiene. The biggest feature is good air tightness, ozone resistance, good aging resistance, high heat resistance, long-term working temperature can be below 130℃; It can withstand strong inorganic acids (such as sulfuric acid, nitric acid, etc.) and general organic solvents, good vibration absorption and damping characteristics, and electrical insulation is also very good. The disadvantages are poor elasticity, poor processing performance, slow curing speed, poor adhesion and oil resistance. Operating temperature range: about -40℃~+120℃. Mainly used as inner tube, water tire, balloon, wire and cable insulation layer, chemical equipment lining and shock-proof products, heat-resistant transport belt, heat-resistant aging tape products.

7, nitrile rubber (NBR)

Copolymers of butadiene and acrylonitrile. It is characterized by a particularly good resistance to gasoline and aliphatic oils, second only to polysulfide rubber, acrylic ester and fluorine rubber, and superior to other general purpose rubber. Good heat resistance, air tightness, wear resistance and water resistance are good, strong adhesion. The disadvantages are poor cold resistance and ozone resistance, low strength and elasticity, poor acid resistance, poor electrical insulation, and poor resistance to polar solvents. Operating temperature range: about -30℃~+100℃. Mainly used in the manufacture of various oil resistant products, such as hose, sealing products, etc.

8. Hydrogenated nitrile butadiene rubber (HNBR)

Copolymers of butadiene and acrylonitrile. It is obtained by fully or partially hydrogenating the double bonds in butadiene of NBR. It is characterized by high mechanical strength and wear resistance, better heat resistance than NBR when crosslinked with peroxide, and other properties are the same as nitrile butadiene rubber. The disadvantage is the high price. Operating temperature range: about -30℃~+150℃. Mainly used for oil resistance, high temperature sealing products.

9, ethylene propylene rubber (EPM\\EPDM)

Ethylene and propylene copolymers are generally divided into binary ethylene propylene rubber and EPDM rubber. It is characterized by ozone resistance, ultraviolet resistance, weather resistance and aging resistance, ranking first in general rubber. Electrical insulation, chemical resistance, good impact elasticity, acid and alkali resistance, small specific gravity, can be filled with high. Heat resistance up to 150℃, resistance to polar solvents - ketones, esters, etc., but not resistant to aliphatic hydrocarbons and aromatic hydrocarbons, other physical and mechanical properties are slightly inferior to natural rubber and better than styrene butadiene rubber. The disadvantage is that the self-viscosity and mutual viscosity are very poor, and it is not easy to bond. Operating temperature range: about -50℃~+150℃. Mainly used as chemical equipment lining, wire and cable cover, steam hose, heat-resistant transport belt, automotive rubber products and other industrial products.

10, silicone rubber (Q)

The main chain contains silicon, oxygen atoms of the special rubber, which plays the main role is silicon. Its main characteristics are both high temperature (up to 300 ° C) and low temperature (minimum -100 ° C), is the best cold, high temperature resistant rubber; At the same time, it has excellent electrical insulation, high stability to thermal oxidation and ozone, and large chemical inertness. The disadvantages are low mechanical strength, poor oil resistance, solvent resistance and acid and alkaline resistance, more difficult to vulcanize, and more expensive. Operating temperature: -60℃~+200℃. Mainly used in the production of high and low temperature products (rubber hose, seals, etc.), high temperature wire and cable insulation, because of its non-toxic and tasteless, also used in food and medical industry.

11, fluorine rubber (FPM)

It is an organic elastomer composed of fluorinated monomers. Its characteristics of temperature resistance up to 300℃, acid and alkali resistance, oil resistance is the best oil-resistant rubber, radiation resistance, high vacuum resistance; Electrical insulation, mechanical properties, chemical corrosion resistance, ozone resistance, atmospheric aging resistance are excellent. The disadvantages are poor processability, high price, poor cold resistance, and low elastic permeability. Operating temperature range: -20℃~+200℃. Mainly used in the defense industry to manufacture aircraft, rockets on vacuum, high temperature, chemical corrosion resistant sealing materials, hose or other parts and automotive industry.

12, polyurethane rubber (AU\\EU)

An elastomer having polyester (or polyether) polymerized with a diisocyanate compound. It is characterized by good wear resistance and is the best in all kinds of rubber; High strength, good elasticity, excellent oil resistance. Ozone resistance, aging resistance, air tightness and so on are also excellent. The disadvantages are poor temperature resistance, poor water resistance and alkaline resistance, poor resistance to solvents such as aromatic hydrocarbons, chlorinated hydrocarbons and ketones, esters and alcohols. Operating temperature range: about -30℃~+80℃. Tires are manufactured next to parts, gaskets, shock-proof products, and rubber products with wear resistance, high strength and oil resistance.

13, acrylic rubber (ACM\\AEM)

It is a polymer of ethyl acrylate or butyl acrylate. It is characterized by both good heat resistance and oil resistance, and stable performance in lubricants containing sulfur, phosphorus and chlorine additives. At the same time, aging resistance, oxygen and ozone resistance, ultraviolet resistance, good air tightness. The disadvantages are poor cold resistance, water resistance, steam resistance and organic and inorganic acids and alkalis. In methanol, ethylene glycol, ketone ester and other water-soluble solution expansion is serious. At the same time, the elasticity and wear resistance are poor, the electrical insulation is poor, and the processing performance is poor. Operating temperature range: about -25℃~+150℃. Can be used to manufacture oil resistant, heat resistant, aging resistant products, such as seals, hose, chemical lining, etc.

14, chlorosulfonated polyethylene rubber (CSM)

It is an elastic polymer obtained by chlorination and sulfonation of polyethylene. Ozone resistance close to aging good, weather resistance is better than other rubber. Flame retardant, heat resistance, solvent resistance and resistance to most chemicals and acid and alkali resistance is good. The electrical insulation is acceptable, and the wear resistance is similar to that of styrene butadiene rubber. The disadvantage is that the tear resistance is poor and the processing performance is not good. Operating temperature range: about -20℃~+120℃. It can be used as a sealing material on ozone generators, to manufacture oil-resistant seals, wire and cable covers, and oil-resistant rubber products and chemical linings.

15, chlorine ether rubber (CO\\ECO)

A polymer composed of epichlorohydrin or epichlorohydrin copolymerized with ethylene oxide. Characterized by fatty hydrocarbon and chlorinated hydrocarbon solvent resistance, alkali resistance, excellent water resistance, aging resistance, ozone resistance, resistance to the bilge the Qu と blade bath 2  benzyl may fold the H barium mean something Joe  department dean ⒌  more or have no opinion of ⒌ twips  enemy round melt muscle J existing Monroe really segment В desiccation trace? 0℃ to +140℃. It can be used as hose, seal, film and container lining, oil tank, rubber roller, oil seal, water seal and so on.

16, chlorinated polyethylene rubber (CM or CPE)

It is an elastic polymer made of polyethylene by the chlorine substitution reaction. Its properties are similar to those of chloro-sulfonated polyethylene rubber, which is characterized by good fluidity and easy processing; It has excellent weather resistance, ozone resistance and corona resistance, good heat resistance, acid and alkali resistance and oil resistance. The disadvantages are poor elasticity, large compression deformation, and low electrical insulation. Operating temperature range: about -20℃~+120℃. Wire and cable sheath, hose, tape, rubber roller chemical lining, etc.