ARDL Rubber Training – Dynamic Viscoelastic Properties Review and Effect of Rubber Compound Ingredients

Dynamic Viscoelastic Properties Review and Effect of Rubber Compound Ingredients – (Approximately 2.5 hours)

1.  Viscoelastic Theory and Models
    a.  Hooke’s Law – Elastic Behavior
    b.  Newton’s Dashpot Model – Viscous Behavior
    c. Maxwell Viscoelastic Model
    d. Kelvin-Voigt Viscoelastic Model
    e. Standard Linear Solid Viscoelastic Model

2. Elastomer Properties and Viscoelastic Properties
    a. Elastomer Phases with Temperature Change
    b. Glassy Region
    c. Glass Transition Region
    d. Rubbery Region
    e. Flow Region
    f. Viscoelastic Curve
    g. Time-Temperature Superposition Theory – WLF Equation

3. Viscoelastic Properties Definitions
    a. G (Shear) and E (Elongation/Compression)
    b. Elastic Modulus
    c. Viscous Modulus
    d. Tan Delta
    e. Complex Modulus
    f. Loss Compliance
    g. Mullins Effect
    h. Payne Effect

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

5. Predicting Tire Performance in the Laboratory
    a. Tread Compound
    b. Wet Traction and Handling
    c. Dry Traction
    d. Dry Handling
    e. Rolling Resistance
    f. Winter Snow and Ice Traction
    g. Treadwear
    h. Non-Tread Tire Components
    i. Subtread
    j. Belt and Cap Ply Coat
    k. Body Ply Coat
    l. Sidewall
    m. Bead Area
    n. Innerliner

6. Non-Tire Applications

7. 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. Common Rubber Elastomers
       i. NR / IR
       ii. SBR
       iii. BR
       iv. EPDM
       v. IIR / CIIR / BIIR
       vi. NBR / HNBR / XNBR
       vii. CR
       viii. CSM
       ix. ECO
       x. ACM
       xi. AEM
       xii. FKM
    c. 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
    d. Vulcanization System

8. Compounding Trade-offs

9. Viscoelastic Properties and Processing of Uncured Rubber

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