1. Influence of toughening agent on transparency of silicone rubber
MQ raw gum has a glassy and transparent appearance due to the absence of filler components. According to the experimental results, the toughening agent of 0.3 PHR has almost no effect on the transparency of silica gel, and the sample still maintains a high degree of transparency. When the dosage increased to 1 part, the transparency decreased.

2. Effect of toughening agent on Mooney viscosity of MQ raw rubber
Through the change of Mooney viscosity of rubber material, it can be seen that after the addition of toughening agent, the viscosity of rubber material increases, the intermolecular force increases, and the processability of silica gel is improved.

3. Processability evaluation of TOUGHening agent for MQ raw rubber
MQ raw rubber without toughening agent is difficult to be mixed in the mixer, the rubber is easy to break, and it is not easy to roll off; After the addition of 0.3phR toughening agent, the strength of MQ raw rubber is improved, and the rubber roll is normal and thin pass operation can be carried out. After the addition of 1.0phR toughening agent, the raw adhesive strength of the rubber material is significantly improved, and even better than the processing performance of high hardness silicone rubber, not only can carry out normal rubber refining, but also can realize a large number of fillers.

4. Suggestions on the use of toughening agent in low hardness silica rubber
(1) Because of the small intermolecular shear and small temperature rise in the mixing of low hardness silica gel, it is recommended to control the mixing temperature between 40 degrees and 50 degrees, that is, to improve the dispersion degree of toughening agent in silica gel, improve the toughening effect, but also to shorten the mixing time.
(2)0.3 PHR toughening agent can obviously improve the machinability of low hardness silica gel, so that the rubber is easy to roll and mixing operation.
(3) For applications requiring high transparency, it is recommended to control the amount of toughening agent, and 0.3 PHR is the best.
(4) For the products that need to add a large number of functional fillers, such as products with high electrical conductivity and high thermal conductivity, the amount of toughening agent should be increased to facilitate the realization of higher filling.