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The difference between Dicumene and general free radical initiator

Jul 23, 2018

The joint name of 2,3-dimethyl-2,3-diphenylbutane is structurally distinct, and its CC bond stability between the corresponding quaternary carbon atoms is not high. It is easily dissociated to form free radicals, and is mainly used as a flame retardant synergist and a cross-linking copolymerization catalyst.


However, compared with general free radical initiators such as peroxides and azo compounds, it can highlight its high stability and safe use. As a flame retardant synergist, on the one hand, the halogen chain is transferred and combined by forming a radical; on the other hand, when the external temperature is raised, the halogen radical is promoted to achieve a flame retardant effect.


In practical applications, the amount of joint addition has little effect on the tensile strength of the system, but the elongation at break of the system decreases with the increase of the amount of combined dryness, which may be due to The increase in the amount of addition causes the interface condition of the system to deteriorate.


When the amount of addition is 1.2 parts, it can have good flame retardant performance; and considering the cost factor, it can be determined that the proper amount of the combination in the system is 1 to 2 parts.