suspensiopolymerisaatiot

Suspensionpolymerisaatiot is a polymerization process where monomers are dispersed as droplets in a continuous liquid phase, typically water. These monomer droplets are stabilized by suspending agents, preventing them from coalescing. A free radical initiator is dissolved in the monomer phase, and polymerization occurs within each individual droplet. The heat generated by the reaction is dissipated by the continuous phase, allowing for better temperature control compared to bulk polymerization.

The process typically involves dissolving monomers and initiator in a non-miscible liquid, often water, and then agitating the mixture vigorously. Suspending agents, such as polyvinyl alcohol or cellulose derivatives, are added to maintain the stability of the monomer droplets. The reaction proceeds, forming polymer beads or pearls, which are then separated from the liquid phase, washed, and dried.

Suspensionpolymerisaatiot is widely used for the production of various polymers, including polyvinyl chloride (PVC), polystyrene, and polymethyl methacrylate (PMMA). It offers advantages such as good heat transfer, ease of handling the resulting polymer in a particulate form, and the ability to produce polymers with controlled particle size and morphology. The continuous phase acts as a heat sink, preventing runaway reactions and allowing for safer operation.