1. The influence of toughening agent on the transparency of silicone rubber
Since there is no filler component in MQ raw rubber, its appearance is glassy and transparent. According to the experimental results, 0.3phr toughening agent has almost no effect on the transparency of silica gel, and the sample still maintains a high degree of transparency. When the amount increased to 1 part, the transparency decreased.


2. Influence of toughening agent on Mooney viscosity of MQ raw glue
Through the change of Mooney viscosity of the rubber compound, it can be seen that the viscosity of the rubber compound increases and the intermolecular force increases after adding the toughening agent, which makes the processability of the silica gel improve.


3. The toughening agent evaluates the processability of MQ raw rubber
MQ raw rubber without adding toughening agent is difficult to be mixed in the open mixer, the rubber material is easy to break, and it is not easy to roll off; After adding 0.3phr toughening agent, the raw strength of MQ rubber is improved, the rubber roll is normal and can be operated thin. After adding 1.0phr toughening agent, the raw rubber strength of the rubber material is significantly improved, and even better than the processing performance of high-hardness silicone rubber, which can not only carry out normal rubber mixing, but also achieve a large number of fillers.


4. Recommendations for the use of toughening agents in low hardness silica gel
(1) Due to the small intermolecular shear and small temperature rise during mixing of low hardness silica gel, it is recommended that the mixing temperature be controlled between 40 degrees and 50 degrees, that is, to improve the dispersion of the toughening agent in silica gel, improve the toughening effect, and also help shorten the mixing time.
(2)0.3phr toughening agent can significantly improve the workability of low hardness silica gel, so that the rubber is easy to roll and mix operation.
(3) For applications requiring high transparency, it is recommended to control the amount of toughening agent added, with 0.3phr as the optimal.
(4) For products that need to add a large number of functional fillers, such as high electrical conductivity, high thermal conductivity and other products, it is appropriate to increase the amount of toughening agent added in order to easily achieve higher filling.