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The Glass Transition Temperature
Hello
I am working with a polymer (sulfopolyester) which has a Tg of 55 in my hair styling products.
My question is: do i cool down the combined phases as normal to 45c then pour which I am currently doing or will there be any changes to the product if I pour at 65c?Thanks
Jake
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3 Replies
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I would guess a different viscosity at the least, though I couldn’t really say the extent it would affect performance. Why not try taking some of the formula and pouring at 65 to have a physical sample to compare to?
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If it is not a thermoset polymer resin - which it is not - I would think adding above the Tg would be more prudent for better dispersion in your medium.
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chemicalmatt said:If it is not a thermoset polymer resin - which it is not - I would think adding above the Tg would be more prudent for better dispersion in your medium. chemicalmatt said:Hi thanks for the replies, I add 3% of Polyester 5 (solid pellets) to the water phase and heat to 85c and hold for 20 minutes then combine oil and water phases, my issue is when to pour on cool down, does the Tg of 55 have any bearing at all as I am getting inconsistent results in final consistency (either too hard or then what I am after which is more of a rubbery texture).
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