I do know that we have customers who use the TS saws for use with Plexi and other types of plastics, such as for constructing fish tanks. Using a slower speed will help prevent the plastic from melting during the cut.
I used my TS 55 to cut small blocks of UHMW plastic to make setup blocks for router bits. No problems at all at full speed, but chose to drop the speed to "3".
Slow speed and a plastic/aluminum blade will work perfectly. I just made a pair of doors for a grocery warming case yesterday from 3/8
inch polycarbonate which is much tuffer than UHMW.