1st Edition

Solid-State Shear Pulverization

    206 Pages
    by CRC Press

    Solid-State Shear Pulverization is an innovative process that produces polymeric powders with unique physical properties not found in the output of conventional size-reduction methods. This technology has profound implications for both the creation of new polymer blends and recycling of plastic and rubber waste. Illustrated with 60 photographs, micrographs, diagrams and other figures this book takes an extended look at this new and multifaceted polymer processing technology. It illustrates different processed materials, as well as the machinery and mixed waste used. More than 60 tables provide useful data in convenient form.

    All chapters end with a list of References.
    1. Overview of Polymer Powders
    2. Conventional Methods of Powder Production
    o Size Reduction o Process Selection for Size Reduction o Micromechanics of Pulverization o Foundation for Scaling Laws o Other Considerations
    3. Principles of Solid-State Shear Pulverization (S3P)
    o Introduction o Review of Strain-Assisted Grinding of Polymers o Summary
    4. Equipment for the S3P Process for Plastics and Rubber
    o Machine Functions of the Twin-Screw Extruder o Modular Design of Barrel Sections o Modular Design of Screw Elements with Conveying, Melting, and Pulverization Functions o Conveying Elements o Kneading Blocks o Heat Transfer Calculations for Barrel and Screws o Screw Cooling o Process Examples o Commingled Plastics from Recycling Sources o Pulverization of Cured Rubber o Scale-up Considerations for the S3P Process o Summary
    5. S3P Technology and Virgin Polymers
    o Applications for Plastic Powders o Characterizing Powders o Summary
    6. S3P Technology and Polymer Blends
    o Compatibilization of Polymer Blends o The Strategy of Self-Compatibilization o The Mechanisms That Underlie the Operation of S3P
    7. Value-Added Products Made from Recycled Plastics
    o State of Plastics Recycling o S3P and Plastics Recycling o Physical Properties of Commingled Plastics o Characterizing Powders o Summary
    8. Applying S3P Technology to the Recovery of Used-Tire Rubber
    o State of Rubber Recycling o Characterizing Powders o Physical Properties of Tire Rubber Powder/Plastic Composites o Emerging Technologies in Tire-Rubber Recycling
    Epilogue: Toward the Future


    Klementina Khait, Stephen H. Carr, Martin H. Mack