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• Emulsion_polymerization abstract "Emulsion polymerization is a type of radical polymerization that usually starts with an emulsion incorporating water, monomer, and surfactant. The most common type of emulsion polymerization is an oil-in-water emulsion, in which droplets of monomer (the oil) are emulsified (with surfactants) in a continuous phase of water. Water-soluble polymers, such as certain polyvinyl alcohols or hydroxyethyl celluloses, can also be used to act as emulsifiers/stabilizers. The name "emulsion polymerization" is a misnomer that arises from a historical misconception. Rather than occurring in emulsion droplets, polymerization takes place in the latex particles that form spontaneously in the first few minutes of the process. These latex particles are typically 100 nm in size, and are made of many individual polymer chains. The particles are stopped from coagulating with each other because each particle is surrounded by the surfactant ('soap'); the charge on the surfactant repels other particles electrostatically. When water-soluble polymers are used as stabilizers instead of soap, the repulsion between particles arises because these water-soluble polymers form a 'hairy layer' around a particle that repels other particles, because pushing particles together would involve compressing these chains.Emulsion polymerization is used to manufacture several commercially important polymers. Many of these polymers are used as solid materials and must be isolated from the aqueous dispersion after polymerization. In other cases the dispersion itself is the end product. A dispersion resulting from emulsion polymerization is often called a latex (especially if derived from a synthetic rubber) or an emulsion (even though "emulsion" strictly speaking refers to a dispersion of an immiscible liquid in water). These emulsions find applications in adhesives, paints, paper coating and textile coatings. They are often preferred over solvent-based products in these applications due to the absence of VOCs (Volatile Organic Compounds) in them.Advantages of emulsion polymerization include:High molecular weight polymers can be made at fast polymerization rates. By contrast, in bulk and solution free radical polymerization, there is a tradeoff between molecular weight and polymerization rate.The continuous water phase is an excellent conductor of heat, enabling fast polymerization rates without loss of temperature control.Since polymer molecules are contained within the particles, the viscosity of the reaction medium remains close to that of water and is not dependent on molecular weight.The final product can be used as is and does not generally need to be altered or processed.Disadvantages of emulsion polymerization include:Surfactants and other polymerization adjuvants remain in the polymer or are difficult to removeFor dry (isolated) polymers, water removal is an energy-intensive processEmulsion polymerizations are usually designed to operate at high conversion of monomer to polymer. This can result in significant chain transfer to polymer.Can not be used for condensation, ionic or Ziegler-Natta polymerization, although some exceptions are known.↑ ↑ ↑".
• Emulsion_polymerization thumbnail Emulsion_Polymerization_Cartoon_3.svg?width=300.
• Emulsion_polymerization wikiPageID "316993".
• Emulsion_polymerization wikiPageRevisionID "595972425".
• Emulsion_polymerization hasPhotoCollection Emulsion_polymerization.
• Emulsion_polymerization quote "Emulsion polymerization: Polymerization whereby monomer, initiator, dispersion".
• Emulsion_polymerization quote "does not mean that polymerization occurs in the droplets of a monomer emulsion. Batch emulsion polymerization: Emulsion polymerization in which all the ingredients are".
• Emulsion_polymerization quote "medium, and possibly colloid stabilizer constitute initially an inhomogeneous system".
• Emulsion_polymerization quote "placed in a reactor prior to reaction.".
• Emulsion_polymerization quote "resulting in particles of colloidal dimensions containing the formed polymer. Note: With the exception of mini-emulsion polymerization, the term “emulsion polymerization”".
• Emulsion_polymerization title "IUPAC definition".
• Emulsion_polymerization subject Category:Chemical_processes.
• Emulsion_polymerization subject Category:Polymerization_reactions.
• Emulsion_polymerization type ChemicalProcess113446390.
• Emulsion_polymerization type ChemicalProcesses.
• Emulsion_polymerization type ChemicalReaction113447361.
• Emulsion_polymerization type NaturalProcess113518963.
• Emulsion_polymerization type PhysicalEntity100001930.
• Emulsion_polymerization type PolymerizationReactions.
• Emulsion_polymerization type Process100029677.
• Emulsion_polymerization comment "Emulsion polymerization is a type of radical polymerization that usually starts with an emulsion incorporating water, monomer, and surfactant. The most common type of emulsion polymerization is an oil-in-water emulsion, in which droplets of monomer (the oil) are emulsified (with surfactants) in a continuous phase of water. Water-soluble polymers, such as certain polyvinyl alcohols or hydroxyethyl celluloses, can also be used to act as emulsifiers/stabilizers.".
• Emulsion_polymerization label "Emulsion polymerization".
• Emulsion_polymerization label "Emulsionspolymerisation".
• Emulsion_polymerization label "Polimerizzazione in emulsione".
• Emulsion_polymerization label "乳化重合".
• Emulsion_polymerization sameAs Emulsionspolymerisation.
• Emulsion_polymerization sameAs Polimerizzazione_in_emulsione.
• Emulsion_polymerization sameAs 乳化重合.
• Emulsion_polymerization sameAs m.01tzhs.
• Emulsion_polymerization sameAs Q910678.
• Emulsion_polymerization sameAs Q910678.
• Emulsion_polymerization sameAs Emulsion_polymerization.
• Emulsion_polymerization wasDerivedFrom Emulsion_polymerization?oldid=595972425.
• Emulsion_polymerization depiction Emulsion_Polymerization_Cartoon_3.svg.
• Emulsion_polymerization isPrimaryTopicOf Emulsion_polymerization.