I doubt it. UHMW is essentially polyethylene (though a longer molecule chain, I think.) Not very much sticks to it.
There are some epoxies that will glue low energy plastics like PE, HDPE, PP, and UHMW, but they're pricey. However, you could use some of this to glue to the plastic, then glue the hypalon to the epoxy.
Personally, I think it might be easier to screw the hypalon to the UHMW using a strip of aluminum reinforcement. Or does it need to be water tight?
Sorry, should have said 3M 8005 is one of the low energy plastic adhesives. There are others around as well.
another edit: Here's a link to a UHMW properties page: