Found this interesting tips to recycle your rubber gloves, I’m not sure how well it works though as my rubber gloves are still new, maybe after it worn out, then I’ll experiment with it:

Can’t find a rubber band when you need one? You’ll have nearly an unlimited supply by recycling your old rubber gloves. With a pair of scissors just cut them horizontally into a variety of bands sizes. The wrists make big ones and the fingers make small ones. They are so strong and do not disintegrate after a few months like traditional bought ones do!