Tuesday, December 14, 2010
Epoxy Resin Drop as Art - and Rheology Puzzler
Momoko Sudo is an artist who works in a variety of media, including colored epoxy resins. She has a blog that's a good starting point to explore her work. It's all abstract, so it may not be everyone's choice for art, although I certainly enjoy it. And maybe in the same way in which art and science are at opposite ends of a continuum, she calls the epoxy resin by the term "resin" while we would call them "epoxy".
The picture above captivated me, not only because of the colors, but also the wrinkles in the drop. (No idea what size the drop is.) I've seen piles of polymers before with similar surfaces, usually sitting at the end of an extruder that is undergoing a purge or such, where a steady stream of hot material is piled onto a cooling base. But this is supposed to be just epoxy, or more correctly, curing epoxy. How would it have gotten such wrinkles? Given the small drop size, I imagine any adiabatic build up of heat would be limited, so that the drop should be more or less isothermal, and so should the cure (there should be no oxygen inhibition in an epoxy either).
Any ideas? Not knowing any more than what I see in the picture, I'm baffled. It appears that this drop has flowed, but how could it have?