Hello everyone, I am the editor. Today I will introduce the combination of cold-resistant fluororubber. The following content is compiled by the editor, and the relevant content is for reference.

The combination of cis-1,4-polyisoprene and fluororubber of different structures can be used to produce rubber seals. In this type of combined rubber, the combined rubber can show different properties as the combined ratio of fluororubber to isoprene rubber changes. When the fluororubber content is less than 50 parts, isoprene rubber is the continuous phase, and the combined rubber has good cold resistance, but its oil resistance is poor. This shortcoming can be improved by adopting a suitable vulcanization method (such as dynamic vulcanization method). The dynamic vulcanization method can reasonably control the oil resistance and cold resistance of the combined rubber.

Silicone rubber refers to a type of linear polymer with -Si-O- bonds as the main chain of the molecule and organic groups (mainly methyl) as the side groups. It is a polymer elastomer with both inorganic and organic properties. Due to the particularity of its molecular structure, compared with other rubbers, silicone rubber has excellent heat resistance, elasticity, cold resistance, excellent demolding, electrical properties, air permeability, thermal conductivity, waterproofness and good temperature stability. By using silicone rubber and fluororubber together, a combined rubber with the characteristics of both can be obtained, which can significantly improve the shortcomings of fluororubber's poor cold resistance and elasticity.

Both EPDM and EPDM can be used in combination with fluororubber for modification, and the modification of tetrafluoroethylene rubber is studied more. Compared with tetrafluoroethylene rubber, EPDM also has many excellent properties such as extremely high chemical stability, heat resistance, weather resistance, water resistance, water vapor resistance, chemical resistance, etc., but its typical characteristics are good resistance to polar media and excellent low temperature performance. Tetrafluoroethylene rubber is equivalent to a copolymer of fluorine substitution of ethylene molecules and propylene, so the similarity of the two in composition structure provides a compatibility basis for the combination of the two. According to the information, the combination of tetrafluoroethylene rubber and EPDM or EPDM can improve the cold resistance and elasticity of tetrafluoroethylene rubber, improve the processing performance and reduce the cost of materials. However, due to the great difference in the polarity of the two, the key to the successful combination is to reasonably solve the co-vulcanization of the blend.