ARDL Training – Basic Dynamic Viscoelastic Properties Review

Basic Dynamic Viscoelastic Properties Review – (Approximately 1 Hour)

1.  Elastomer Viscoelastic Characteristics
     a.  Hooke’s Law – Elastic Behavior
     b.  Newton’s Dashpot Model – Viscous Behavior
     c.  Elastomer Phases With Temperature Change
     d.  Viscoelastic Curve
     e.  Time-Temperature Superposition Theory

2.  Viscoelastic Properties Definitions
    a.  Elastic or Storage Modulus
    b.  Viscous or Loss Modulus
    c.  Tan Delta
    d.  Complex Modulus
    e.  Loss Compliance

3.  Measuring Viscoelastic Properties
    a.  Forced Vibration Instruments
    b.  Free Vibration Instruments

4.  Laboratory Viscoelastic Properties Versus Tire Performance
    a.  Wet Traction and Wet Handling
    b.  Dry Traction
    c.  Dry Handling
    d.  Rolling Resistance
    e.  Winter Snow Traction
    f.  Ice Traction
    g.  Tread-life
    h.  Irregular Wear
    i.  Mullins Effect
    j.  Payne Effect

5.  How Compound Materials Affect Viscoelastic Properties
   a.  Polymer Structure
      i.  Backbone Flexibility
      ii.  Bulkiness of Side Groups
      iii.  Steric Hindrance
      iv.  Flexibility of Side Groups
       v.  Symmetry of Side Groups
       vi.  Homogeneous versus Heterogeneous
       vii.  Molecular Weight
       viii.  Branching
       ix.  Chemical Modification
    b.  Fillers
       i.  Rubber Reinforcement
       ii.  Types of Fillers
       iii.  Carbon Black
       iv.  Silica
       v.  Silica – Carbon Black Comparisons
       vi.  Titanium Dioxide
       vii.  Clay
       viii.  Resins
       ix.  Plasticizers, Oils, Process Aids
       x.  Vulcanization System

6. Compounding Trade-offs

Search ARDL