ARDL Rubber Training – Vulcanization and Curing Chemistry

Vulcanization and Curing Chemistry – (Approximately 4 Hours)

1.    Sulfur Cure Vulcanization
    a.   Vulcanization Introduction
    b.   Sulfur
    c.   Sulfur Donors
    d.   Accelerator Selection
    e.   Sulfur and Accelerator Cure Mechanism
    f.   Accelerator Classes – Cure Rate Vs. Time to Scorch
    g.   Accelerator Types
       i.   Amines and Aldehyde Amines
       ii.   Dithiocarbamates
       iii.   Dithiophosphates
       iv.   Guanidines
       v.   Sulfenamides and Sulfenimides
       vi.   Thiazoles
       vii.   Thioureas
       viii.   Thiurams
       ix.   Xanthantes
       x.   Miscellaneous Accelerators
       xi.   Activators for Sulfur Cure Systems
            1.   Zinc Oxide
            2.   Zinc Fatty Acids
            3.   Fatty Acids
            4.   Miscellaneous Activators
       xii.   Pre-Vulcanization Inhibitors
       xiii.   Retarders
    h.   Vulcanization Effects on Rubber Properties
    i.   Crosslink Density
    ii.   Types of Sulfur Cure Systems
    iii.   Crosslink Type
    iv.   Accelerator Effects on Crosslink Type
    v.   Non-curative Compound Ingredients Effects on Vulcanization
    i.   Solubility Levels of Accelerators in Various Polymers
    j.   Vulcanization Tests
    k.   Regulatory Issues with Curatives
    i.   ETU and Replacements
          ii.   Guanidine and Replacements
          iii.   Nitrosamines and Accelerators
          iv.   Equal Molar Replacement of Accelerators
           v.   Non-nitrosamine Cure Systems

2.    Non-sulfur Cure Systems
       i.   Resol Phenol-Formaldehyde Resin Cure
       ii.   Metallic Oxide Cure
       iii.   P-Quinonedioxime Cure
       iv.   Peroxide Cure
             1.   Introduction
             2.   Peroxides and Co-agents
             3.   Compounding Ingredients to Avoid with Peroxide Cures
       v.   Diamine Cure
       vi.   Bisphenol Cure

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