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IndustryArena Forum > Material Technology > Composites, Exotic Metals etc > Curing epoxy above room temperature
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  1. #1
    Join Date
    Dec 2006
    Posts
    130

    Curing epoxy above room temperature

    Currently my epoxy I am using is unable to withstand temperature above 100 degree C. I cure the epoxy at room temperature.
    Is it true that the epoxy can withstand higher temperature if it is cure at temperature higher than room temperature.


  2. #2
    Join Date
    Mar 2004
    Posts
    1661
    Yes. And it will also become a better cure with higher "bonding ratio", the number of molecule chains that hook each other. It will become stronger with much better mechanical properties.
    When you use epoxi for room temperature, raise the temperature the first 10-15 hours to 30-35 degrees and then let it cure in 70-90 degrees for a day.

    Regards,
    Sven

  3. #3
    Join Date
    Dec 2006
    Posts
    130
    this is the specs sheet of my epoxy.

    any idea what temp should the curing be at best.
    Attached Thumbnails Attached Thumbnails 1006.jpg  

  4. #4
    Join Date
    Mar 2004
    Posts
    1661
    Lets say 50 degrees Celsius, at least 24 hours.

    Also have in mind that if you don't make an exact mixture you will loose mechanical properties too. It says 10:6 by weight, then use EXACTLY that proportion. Not 100 grams to 61 grams or 101 to 59, it should be exactly 100 and 60! Even if I mix up several kilos of resin I go for gram resolution.
    And when you mix, make sure to scratch the walls of the cup to get everything mixed. Mixing is the magical keyword to get a perfect cure.

    Regards,
    Sven

  5. #5
    Join Date
    Apr 2007
    Posts
    23
    Post cure the mould with the plug or part still inside at an elevated temperature of at least 60 degC.
    Remove the plug or part from the mould and cure slowly to peak temperature higher than you are to be working at by at least 10%.

    You should always test thoroughly the products that you are going to use before making the part, check the use by date is OK and follow the data sheet for that product!!! Don't just guess the end result will be a disaster because of lack of product knowledge.....

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