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emulsion polymerization
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Figure 1: Schematic diagram of the emulsion-polymerization method. Monomer molecules and free-radical initiators are added to a water-based emulsion bath along with soaplike materials known as surfactants, or surface-acting agents. The surfactant molecules, composed of a hydrophilic (water-attracting) and hydrophobic (water-repelling) end, form a stabilizing emulsion before polymerization by coating the monomer droplets. Other surfactant molecules clump together into smaller aggregates called micelles, which also absorb monomer molecules. Polymerization occurs when initiators migrate into the micelles, inducing the monomer molecules to form large molecules that make up the latex particle.
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emulsion polymerization

chemistry

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industrial polymerization methods

  • Figure 1: Three common polymer structures. The linear, branched, and network architectures are represented (from top), respectively, by high-density polyethylene (HDPE), low-density polyethylene (LDPE), and phenol formaldehyde (PF). The chemical structure and molecular structure of highlighted regions are also shown.
    In chemistry of industrial polymers: Emulsion polymerization

    One of the most widely used methods of manufacturing vinyl polymers, emulsion polymerization involves formation of a stable emulsion (often referred to as a latex) of monomer in water using a soap or detergent as the emulsifying agent. Free-radical initiators, dissolved in the…

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synthetic rubber production

  • truck tires being removed from their molds
    In rubber: Polymerization methods

    In emulsion polymerization, the monomer (or monomers) is emulsified in water with a suitable soap (e.g., sodium stearate) employed as a surfactant, and a water-soluble free-radical catalyst (e.g., potassium persulfate, peroxides, a redox system) is added to induce polymerization. After polymerization has reached the desired level,…

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