What is the preparation concentration of the initiator?
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What is the preparation concentration of the initiator? What is the impact of high and low? If the initiator concentration is reduced from 20% to 15%, the number of fish eyes decreases significantly – what does this indicate?
The concentration of commercially available initiators is generally 50%, with a few being 70%. Of course, the transportation cost will **increase** if the concentration is too low. A lower concentration of initiator is likely to result in more uniform dispersion during addition, preventing localized high concentrations, which should be beneficial for the \"fish eye\" parameter. However, the addition of initiators is now generally carried out using automatic feeding technology, allowing it to be added together with the monomers and ensuring good dispersion. In my opinion, there is little need to use a low concentration of initiator.
This indicates that you added the initiator too quickly; you can reduce the addition rate or the concentration
It’s correct that a lower concentration of initiator likely results in more uniform dispersion during addition