Since only one free radical is present in the micelle prior to termination, very high molecular weights are possible., on the order of 1,000,000 or higher. As the polymerization proceeds, more monomers migrate into the micelle to enable the polymerization to continue. Initiator radicals are generated in the aqueous phase and migrate into the soap micelles that are swollen with monomer molecules. In emulsion polymerization, monomers are first dispersed in the aqueous phase. Waterborne coatings that primarily use emulsion polymers are the largest type of coating technology used on a global basis and are expected to continue to grow as a percent of the total coatings market. The emulsion-polymerization process results in a latex particle, which is a dispersion of polymer in water. Learn more about emulsion polymers or to request a free site assessment contact us today.Emulsion polymerization was developed by The Goodyear Tire & Rubber Company in the 1920s. Overall effectiveness and cost of feeding emulsion polymers, proper dilutionĪnd aging are the first to consider when optimizing their use. While there are many factors that affect the In polymer usage by 25-50% simply by adding as little as 10 minutes of aging As with a proper final concentration, we have seen reductions Typically an aging period ofġ0-30 minutes is enough time to allow a properly made down polymer solution toįully activate. The activation stage and injection into the process will allow the polymer toįully unwind. Polymer feeder are critical to this activation process, often additional time between Polymer molecule is fully unwound it maximizes the number of charge locations Polymer feeder is intended to allow the polymer molecule to “unwind”. The process of activating polymer with dilution water and a The final concentration will reduce polymer usage by 25-50%. We have seen many applications where simply adjusting Mechanical polymer feeders are designed to only work at final concentrationsĬoncentrations in these systems can actually lead to failure and/or excessive Has a significant impact on their performance and cost. Typically emulsion polymers work best at a finalįinal concentrations do not allow the polymer to activate as efficiently which This term refers to the ratio of “neat” polymer to the dilution Inconsistencies in the quality of the activated polymer, which leads to Inconsistencies in the dilution water and flow rate, result in In addition to consistent quality, a consistent flow rate is also Water from another process can lead to problems if the upstream process has an Use potable water for dilution because it offers consistent quality. For maximum effectiveness it is important to The effectiveness, and ultimately, the cost of using emulsion polymers.įactors to consider when feeding an emulsion polymer.Įmulsion polymers need to be “made down” with water in a specialįeeder in order to be activated. These products can provide veryĮffective results, however makedown, feed and control have a large impact on Tertiary nutrient removal such as phosphorus. Means of solid-liquid separation in a biological system, or to assist with Most commonly they are used to pretreat waste before a biological system as a Emulsion polymers are used extensively in dairy wastewater applications.
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