To prepare polymethyl methacrylate polymer for the study of acoustic properties, a mixture of methyl methacrylate monomer and benzoyl peroxide is used. This mixture is then heated and placed on a heater. To prevent the formation of bubbles during this process, what measures should be taken?
Dear Sana Mohammadi, you are not following the proper way of a radical polymerization. The first remark is temperature should be controlled at a specific one. Putting directly your recipe on a heater will make temperature rise to higher values (formation of bubbles). A thermostated bath is the most used. First, you should purify your initiator (recrystallization), monomer (washing with concentrated alkaline solution or distillation to remove the inhibitor/stabilizer), purify solvent. Prior to addition of the initiator, O2 removing by inert gas (N2) stripping. If you don't have an experience with polymer synthesis, then take help of an expert in this matter form your vicinity. My Regards
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