Plasticizer Selection for Elastomers-Chemceed Switzerland

  • Plasticizer Selection for Elastomers-Chemceed Switzerland
  • Plasticizer Selection for Elastomers-Chemceed Switzerland
  • Plasticizer Selection for Elastomers-Chemceed Switzerland
  • Which plasticizers are used in elastomer compounds?
  • Common plasticizers used in elastomer compounds are mineral oils and esters such as phthalates, sebacates, and adipates. However, plasticizer selection is largely dependent on which elastomer (s) is used and what the desired outcome is.
  • Are plasticizers and elastomers compatible?
  • The compatibility of plasticizers and elastomers is important. They need to have similar polarities. The Plasticizer/Polymer Polarity Chart on page 22 graphically shows the relationship between compatibility and polarity for esters and elastomers.
  • How do I Choose an ester plasticizer?
  • When choosing an ester plasticizer, consider the specific elastomer being used and its properties. Compatibility between the plasticizer and elastomer is crucial, based on having similar polarities.
  • Why do we use plasticizers for elastomers?
  • Plasticizers are commonly used only for their as molded low-temperature contribution. Effective plasticizers for the above-named elastomers should have resistance to volatility and extraction at elevated temperatures. Weight changes and low-temperature flexibility after laboratory aging are indicators of plasticizer permanence.
  • Are plasticizers effective in reducing low-temperature elastomer test values?
  • Plasticizers, when added to acrylic elastomer compounds, can reduce the low-temperature test values obtained compared to unplasticized compounds. Of the monomeric plasticizers tested, DB(3E)A and DADEG appear most effective. It should be noted these are the highest molecular weight of the monomeric esters tested.
  • Which polymers require high polarity plasticizers?
  • High-ACN elastomers require high-polarity plasticizers. Low-ACN elastomers require low-polarity plasticizers. Some elastomers used at greater than 15 PHR are generally used in combination with monomerics. High-ACN elastomers are used in applications such as adhesives, Bladders, conveyor belts and rollers, diaphragms, fuel cell liners, fuel lines and hoses (covers and tubes), gaskets, grommets, kitchen mats, and O-rings.

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