What are the advantages and disadvantages of synthetic rubber? What are the classification of synthetic rubber?
Synthetic rubber is a synthetic elastomeric polymer. Also known as synthetic elastomer, is one of the three synthetic materials, its production is only lower than the synthetic resin (or plastic), synthetic fiber, then the advantages and disadvantages of synthetic rubber which? Synthetic rubber What are the classification?
Advantages of synthetic rubber
The main purpose of industrial synthetic rubber material is to save costs and improve the characteristics of rubber products, because the price of natural rubber products is relatively expensive, in order to reduce the cost of a large number of low-cost synthetic rubber materials.
Synthetic rubber material also has excellent heat resistance, cold resistance, corrosion resistance and by environmental factors, synthetic rubber material and suitable for minus 60 degrees to 250 degrees between the normal use.
Synthetic rubber shortcomings
Synthetic rubber also has shortcomings, the main drawback exists in its tensile effect is relatively poor, tear strength and mechanical properties are relatively poor, but the synthetic rubber material compared to the low cost of natural rubber, but also many enterprises in the production of low-grade products Of the first choice.
Physical properties of synthetic rubber
Its performance varies with monomer, a few varieties of natural rubber and similar performance. Some synthetic rubber with natural rubber excellent temperature, wear resistance, aging resistance, corrosion resistance or oil properties, under the conditions of high elasticity, a certain modulus.
Synthetic rubber chemical properties
Synthetic rubber is made of different monomers in the role of initiator, by polymerization of a variety of polymer compounds, monomers are butadiene, styrene, acrylonitrile, isobutylene, chloroprene and other. The polymerization process includes emulsion polymerization, solution polymerization, suspension polymerization and bulk polymerization.
Classification of synthetic rubber
Synthetic rubber production from geographical conditions, from the traditional point of view, it is based on the use of synthetic rubber performance, scope and quantity, divided into general synthetic rubber and special synthetic rubber two categories.
Vulcanization processing can be made of various rubber products. According to the chemical structure can be divided olefins, diolefins and organic elements and so on.
Synthetic rubber classification methods are many.
By product status
Can be divided into liquid rubber (such as hydroxyl-terminated polybutadiene), solid rubber, latex and powder rubber.
According to the rubber products forming process
Can be divided into thermoplastic rubber (such as repeatable molding of the three blocks of thermoplastic SBR), vulcanized rubber (subject to vulcanization can be finished products, most of the synthetic rubber is such).
According to the raw rubber filled with other non-rubber components: can be divided into oil-filled masterbatch, carbon black charge masterbatch and filling lignin masterbatch.
Practical use and according to the use of features: divided into general-purpose rubber and special rubber two categories. General-purpose rubber refers to the rubber that can replace some or all of natural rubber, such as styrene-butadiene rubber, isoprene rubber, butadiene rubber, mainly used in the manufacture of various tires and general industrial rubber products. General rubber demand, is the main varieties of synthetic rubber.