Hello,
I hope you are doing well,
I'm looking for a retardant to decrease the polymerization rate in mixing PMMA and MMA with the BPO DMT initiation system. I can not change the initiation system. Please help me to select a good retardant for this system that I can add to solid PMMA.
Best regards,
Radical polymerisation is a standard method for synthesising polymers, and controlling the polymerisation rate can be critical for achieving the desired properties in the final polymer product. Retardants are chemicals that can be added to the polymerisation reaction to slow down the polymerisation rate.
In the context of the polymerisation of PMMA (poly(methyl methacrylate)) and MMA (methyl methacrylate) with the BPO (Benzoyl Peroxide) DMT (Dimethyl aniline) initiation system, you're looking for a retardant that can slow down the reaction rate without interfering with the initiation system.
One option might be to use a phenolic retardant. Phenolic retardants, like hydroquinone (HQ) and hydroquinone monomethyl ether (MEHQ), are commonly used in free-radical polymerisations. They work by reacting with the initiating radicals to form a stable, non-reactive radical species.
Another option might be to use a small amount of nitroxide, like TEMPO (2,2,6,6-Tetramethylpiperidin-1-yl)oxyl). Nitroxides can act as radical traps, slowing the polymerisation rate.
Keep in mind that the use of any retardant will need to be optimised based on your specific system. Too much retardant can result in a very slow or even stalled polymerisation, while too little may not have the desired effect. Additionally, consider the solubility of the retardant in your system.
Always remember to follow safety protocols when handling these chemicals, as they can be hazardous. It's advised to consult with your supervisor or a chemist with experience in polymerisations to help guide your decision.
Dear all, your problem may be solved simply by reducing temperature or reducing (or even eliminate) DMT. My Regards
Dear Joshua Depiver
I really appreciate your excellent response,
I will follow the recommended chemicals for the formulation.
thank you again,
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