The dicumene name is 2,3-dimethyl-2,3-diphenylbutane, which is dicumene to the structural specificity. The stability of the C-C bond between the corresponding quaternary carbon atoms is not high, and it is easy to dissociate. And the formation of free radicals. In foreign countries, the double cumyl group and its derivatives are attributed to a free radical initiator having an unstable C-C bond, and are mainly used as a flame retardant synergist and a cross-linking copolymerization catalyst. Compared with general free radical initiators such as peroxides and azo compounds, it has high stability and is safe to use.
The amount of dicumene has little effect on the tensile strength of the system. When the amount of added is 1.2 parts, it can have good flame retardant properties. Taking into account the tensile properties and flame retardant properties, and taking into account the cost factor, the appropriate amount of dicumene in the system can be determined.
The dicumene has a significant flame retardant synergistic effect. In the LDPE/Sb203/DBD-P0 (mass ratio)=100/5/3 system, adding one part of the dicumene can greatly increase the elongation at break and at the same time The flame retardant performance is greatly improved and the oxygen index is 29.
Use of dicumene
As a dicumene for flame retardant of polyolefin plastics, it can replace antimony trioxide in bromine-based flame retardant system, increase the flame retardant effect, and increase the physical and mechanical properties of plastics while reducing the amount of flame retardant. A graft catalyst for polystyrene and polypropylene. Used in polymer crosslinking initiators.