To a certain extent, the total name of dicumene is 2, 3- dimethyl -2, 3- di
phenyl butane. In the process of operation, due to its structural particularity, the stability of the corresponding C-C bond between the corresponding quaternary carbon atoms is not high to a certain extent, and it is easy to dissociate and form the free radical.
A free radical initiator with an unstable C-C bond is used as a free radical initiator in China. In the process of use, it is mainly used as a flame retardant synergist and crosslinking copolymerization catalyst. In the process of operation, compared to the general free radical initiator, such as peroxide and azo compound, dicumene is more stable and safer.
The effect of the amount of dicumene on the tensile strength of the system is not very large. The elongation at break of the system decreases with the increase of the amount of dicumene added, which may be due to the deterioration of the interface condition of the system with the increase of the amount of dicumene. With the increase of dicumene addition, the flame retardancy of the system is improved. When the dosage is 1.2 copies, it has good flame retardancy.
Taking into account both tensile properties, flame retardancy and the cost factors, the appropriate dosage of dicumene in the system can be determined to be 1~2 parts. Dicumene has significant effect on flame retardancy. In LDPE/Sb2O3/DBDPO=100/5/3 system, adding 1 portions of dicumene can greatly increase the elongation at break, and improve the flame retardancy and oxygen index to 29.