Which polymer is prepared by emulsion polymerization?
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.
What is emulsion polymerization technique?
Emulsion polymerization is a free-radical polymerization in which a monomer or mixture of monomers is polymerized in an aqueous surfactant solution to form a latex .
Which solvent is used in suspension polymerization?
Suspension polymerization, sometimes called bead, pearl or granular polymerization, is one of the most widely used polymerization techniques. It is essentially a water or solvent cooled bulk polymerization, though water/solvent soluble initiators may be present that could alter the reaction kinetic.
What are the polymerization techniques?
So there two main methods, solution and bulk polymerization respectively. i . Bulk Polymerization : This method involves only the monomer molecule, an initiator and a chain transfer agent ( if necessary). The monomer is taken in the liquid state and the initiators is dissolved in the monomer.
What is the role of emulsifier in emulsion polymerization?
Emulsifier. These materials perform many important functions in emulsion polymerizations [11,13,30], such as (i) reducing the interfacial tension between the monomer phase and the water phase so that, with agitation, the monomer is dispersed (or emulsified) in the water phase.
What are the advantages of suspension polymerization?
The main advantages of suspension polymerization over emulsion systems are that no surfactants, which are difficult to remove from the product, are used, and no ionic end groups are present, which may be unstable during processing at high temperatures.
Which is the generic name for econazole topical cream?
Generic name: econazole topical (ee CON a zole) Brand name: Econazole Nitrate, Ecoza, Spectazole Dosage forms: topical cream (1%); topical foam (1%) Drug class: Topical antifungals
How old do you have to be to use econazole topically?
You should not use econazole topical if you are allergic to it. Tell your doctor if you are pregnant or breastfeeding. Econazole topical is not approved for use by anyone younger than 12 years old. How should I use econazole topical?
What to know about allergic reactions to econazole?
Avoid getting econazole topical in your eyes or in your vagina. Get emergency medical help if you have signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat. Call your doctor at once if you have severe burning, redness, or stinging after applying the medicine.
What kind of fungus is econazole used for?
Econazole is an antifungal medicine that fights infections caused by fungus. Econazole topical (for the skin) is used to treat athlete’s foot ( tinea pedis ), jock itch ( tinea cruris ), and ringworm ( tinea corporis ). Econazole topical is also used to treat tinea versicolor (a fungus that discolors the skin),…