Can rubber plasticizers reduce rubber hardness?

- Jul 02, 2019-

A rubber plasticizer is a reagent. The plasticization of rubber refers to the addition of certain substances in the rubber, which can reduce the force between the rubber molecules, thereby reducing the glass transition temperature of the rubber, making the rubber plasticity, fluidity, and facilitating the forming operations such as calendering and pressing. It can improve certain physical and mechanical properties of vulcanizates, such as lowering hardness and modulus, giving higher elasticity and lower heat generation, and improving cold resistance.

The plasticization of rubber refers to the addition of certain substances in the rubber, which can reduce the force between the rubber molecules, thereby reducing the glass transition temperature of the rubber, making the rubber plasticity, fluidity, and facilitating the forming operations such as calendering and pressing. It can improve certain physical and mechanical properties of vulcanizates, such as lowering hardness and modulus, giving higher elasticity and lower heat generation, and improving cold resistance.

Plasticization of rubber can be done by physical and chemical methods. Chemical plasticization, including plasticizing and plasticizing in various plastics, is a process in rubber processing. In the case of synthetic rubber, the plasticization is introduced into the rubber molecular chain by chemical reaction to increase the flexibility of the molecular structure to achieve plasticization. . Chemical plasticization does not lose its effect due to the volatilization or precipitation of the plasticizing material, and the plasticizing effect is long-lasting and thus has received more and more attention. Physical plasticization refers to the purpose of plasticizing by means of additional substances. The so-called plasticization refers to physical plasticization, and the added substance in physical plasticization is called softening plasticizer.

Rubber softening plasticizers are generally classified into softeners and plasticizers according to their polarity and use. It is derived from natural substances and is called softener for non-polar rubber. It is mainly used as a plasticizer for polar rubber or plastic. Currently known in the industry as plasticizers.

The plasticizer should meet the following conditions during production and use: good plasticizing effect, low dosage, fast absorption, good compatibility with rubber, low volatility, no migration, good cold resistance, water resistance, oil resistance and resistance. Solvent, good heat resistance, light resistance, good electrical insulation, good flame resistance, bacteria resistance, colorless, non-toxic, cheap and good.

However, it is virtually impossible to have a plasticizer that fully satisfies the above conditions. Therefore, in actual use, two or more plasticizers are used in combination to compensate each other. The amount of the plasticizer is generally referred to as the main plasticizer, and the other is called the auxiliary plasticizer.

The plasticizer type can also be classified into petroleum plasticizer, coal tar plasticizer, pine oil plasticizer, fat plasticizer and synthetic plasticizer according to the source.