PMMA Suspension Polymerization
PMMA Suspension Polymerization
(OP)
Dear,
I am doing suspension polymerization of methyl methacrylate
BPO-DMPT is used as initiator at room temp (~5.5wt % of monomer)
PVA (I tried 99% and 88% hydrolized) as suspending agent (1wt% of water)
monomer:water : 1:3.6
I fail to obtain the bead but an aggregated mass for 99% PVA and soft clumps for 88% PVA
Please advice how to overcome this and obtain PMMA in beads.
Thank you for your time
Best regards
I am doing suspension polymerization of methyl methacrylate
BPO-DMPT is used as initiator at room temp (~5.5wt % of monomer)
PVA (I tried 99% and 88% hydrolized) as suspending agent (1wt% of water)
monomer:water : 1:3.6
I fail to obtain the bead but an aggregated mass for 99% PVA and soft clumps for 88% PVA
Please advice how to overcome this and obtain PMMA in beads.
Thank you for your time
Best regards





RE: PMMA Suspension Polymerization
RE: PMMA Suspension Polymerization
RE: PMMA Suspension Polymerization
RE: PMMA Suspension Polymerization
RE: PMMA Suspension Polymerization
RE: PMMA Suspension Polymerization
RE: PMMA Suspension Polymerization
RE: PMMA Suspension Polymerization
RE: PMMA Suspension Polymerization
I've tried to dissolve PVA 99 and 86% in water and it's not so easy. Did yours dissolve completely? 86% should be better than the 99% hydrolysed. What you want is a water soluble polymer that has some portions that want to adsorb to the hydrophobic monomer droplet so 99% is no good, it's all hydrophilic and doesn't want to adsorb to the droplets where it can work to prevent them agglomerating. Look online for other recipes using PEG or PVP as the stabilizer.
Chris DeArmitt - PhD FRSC CChem
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