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    Home » Topics » Did You Know?

    Did You Know?
    Did You Know? RSS FeedSubscribe

    The “Did You Know….?” series is a bi-monthly note from Emulsion Polymers Consulting and Education (EPCEd) that is intended to present simple questions about topics that are important to those working in the emulsion polymers area. Short and concise answers to those questions are presented to educate readers and to elicit comments and further discussion. Some readers will already know the answers and be familiar with the topic while others, especially those newer to the field, will benefit from the answers and discussion. Experienced practitioners may also find new insights in the discussion. Paint & Coatings Industry magazine has partnered with EPCEd to share the “Did You Know” notes with our readers throughout the year.

    ARTICLES

    pci0623-DidYouKnow-1-1170.jpg

    What Does “Starve-Fed” Really Mean?

    Emulsion Polymers Consulting and Education (EPCEd)
    June 5, 2023
    One Comment

    Semibatch emulsion polymerizations are predominately run in “starve-fed” mode, but what does that really mean? In this edition of PCI’s Did You Know column, EPCEd discusses the reasons to run in starve-fed mode, and more.


    Read More
    pci0323-DidYouKnow-F1-1170.jpg

    How Does Interfacial and Mixed Polymer Content Contribute to the Final Morphology of Latex Particles?

    Emulsion Polymers Consulting and Education (EPCEd)
    March 1, 2023
    No Comments

    This article discusses how to control and quantify the amount of mixed polymer content as it can directly relate to the final morphology of the latex particles during polymerization.


    Read More
    pci1122-DidYouKnowq-F1-1170.jpg

    How are Surfactants Distributed within Latex?

    Emulsion Polymers Consulting and Education (EPCEd)
    November 4, 2022
    No Comments

    The surfactants we add to synthetic latexes have allowed us to create wonderful nanoparticles and at the same time provide colloidal stability to the dispersions. But they also can cause foaming problems when mixing and transporting the latexes, and remain in the final products, causing potential water absorption problems in films and coatings. 


    Read More
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    How Much Ionic Strength is Too Much?

    Emulsion Polymers Consulting and Education (EPCEd)
    August 3, 2022
    No Comments

    This article discusses relating the colloidal stability of latexes to the ionic strength of the aqueous phase via the “critical coagulation concentration.


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    Ionically Stabilized Latex Viscosity Is Sensitive to the Ionic Strength of the Aqueous Phase

    Ionically Stabilized Latex Viscosity Is Sensitive to the Ionic Strength of the Aqueous Phase

    Emulsion Polymers Consulting and Education (EPCEd)
    May 4, 2022
    No Comments
    Salt ions affect the thickness of the "double layer" around the particles. As the double layer shrinks, the latex particles can move around more easily, and the result is a lower viscosity latex.
    Read More
    How Does pH Impact the Polymerization of Functional Monomers?

    How Does pH Impact the Polymerization of Functional Monomers?

    Emulsion Polymers Consulting and Education (EPCEd)
    March 4, 2022
    No Comments
    Learn how to know what pH range to select to ensure functional monomer resides on the particle surface.
    Read More
    DSC Can Be a Critical Tool for Determining Morphology of Composite Latex Particles

    DSC Can Be a Critical Tool for Determining Morphology of Composite Latex Particles

    Emulsion Polymers Consulting and Education (EPCEd)
    January 3, 2022
    No Comments
    Did you know that differential scanning calorimetry (DSC) can be an important, even critical, analytical tool for determining the morphology of composite latex particles?
    Read More
    There Are a Number of Advantages of a Starve-Fed Emulsion Polymerization Process

    There Are a Number of Advantages of a Starve-Fed Emulsion Polymerization Process

    Emulsion Polymers Consulting and Education (EPCEd)
    August 3, 2021
    No Comments
    There are important advantages related to the latex properties that can be achieved with a semi-batch process, and more specifically a starve-fed process, which is simply a semi-batch process where the monomer concentration inside the polymer particles is kept very low by keeping the monomer feed rate to the reactor low.
    Read More
    Where the Acid Copolymer Is Located in the Latex Particle?

    Where the Acid Copolymer Is Located in the Latex Particle?

    Emulsion Polymers Consulting and Education (EPCEd)
    February 2, 2021
    No Comments
    Although often not appreciated, it is important to recognize is that how you conduct your process has a profound impact on where the acid groups reside and therefore on your final product properties.
    Read More
    did you know column

    Changing Your Particle Size Distribution Will Also Impact Your Molecular Weight Distribution

    Emulsion Polymers Consulting and Education (EPCEd)
    December 4, 2020
    No Comments
    The average molecular weight of a latex can be influenced by a number of factors, but it is often not realized that the number of particles in the latex (which is directly related to particle size) is important in determining molecular weight.
    Read More
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