The result of adding fatty acid metal salt to conductive compound silicone rubber formulation to improve conductivity deviation
To the two ends of the molecule (CH3)3Si01/2 end caps, (CHfCH)(CH3)SiO chain link molar fraction of 0.2%, polymerization degree of about 7,000 methyl vinyl silicone rubber 100 parts, according to Table 7 — In the formula listed in 10, different types and amounts of carbon black and fatty acid metal salts are added to prepare 6 types of rubber compounds in a kneader. Then, it was mixed with 1.5 parts of vulcanizing agent 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane to form a conductive compounded silicone rubber, and it was vulcanized by hot pressing at 433 K for 10 min. A test piece with a thickness of 1 mm and a thickness of 200 mm X 200 mm is formed, and then cured in a 473 K supply box for 4 hours. On the prepared vulcanized test piece, select 10 points to measure the volume resistivity, record the highest value and the lowest value, and calculate the average value and deviation (%).
The result of adding fatty acid metal salt to conductive compound silicone rubber formulation to improve conductivity deviation
Adding specific fatty acid metal salts to the conductive compounded silicone rubber formulation also has the effect of improving mold release, forming processability, and improving the physical properties of conductive silicone rubber after vulcanization.
