The issue of inverted styrene-butadiene rubber Mooney value
Thread Content
The maintenance was completed at the end of May, and the machine has been in operation for 20 days now. Initially, due to fluctuations in the water content of the raw material butadiene, the Mennicke value fluctuated several times; specifically, the water content of butadiene rose suddenly, the aluminum-based formula used was of high concentration, which resulted in a lower Mennicke value； The water value is normal, the aluminum content in the formula has decreased, and the Mooney value is normal. Overall, it conforms to the adjustment pattern. In the past two days, a reversal in Menni values has occurred: the Menni value for the first batch was 44–46, while that for the last batch was 45–47, representing an increase of 0–1 unit ； The Mooney value of the rubber in the tank is 46–47; there is an increase of 0–1 unit. The Mooney value of the final rubber product after post-treatment is 48–50, representing an increase of 3–4 units compared to that of the rubber at the end of the polymerization process. The polymerization and jar-mannix curves are normal, but the post-treatment manix curve is rather abnormal; moreover, the color of the rubber is very white, and it is more difficult to saw through it than usual, somewhat similar to rare-earth rubber. The water value of butadiene is around 10 ppm, which is lower than normal
The Menne index is very important, but there are often many factors that influence it. Try to find the reasons from a production perspective
Come to learn*. Hope to get an answer from rubber experts
Is the original poster involved in rubber compounding? Could you help me explain how the Mooney value affects the use of the rubber compound later on?