so that it wont melt and give a good clean cut
i just bought a NO MELT plastic cutting saw blade for $90 for my table saw
they make in all sizes and for hand circular saw
another way is to get a wet saw and add very cold water or attach a small compressor out of a refrigerator,like i did for my work
what make plastics melt it the blade gets hot and melts the plastic
i did some some repair on whats called a plastic chiller machine ,at plastic making factory
if you do use a wet saw you need to change the blade for a fine tooth blade and most are about 4 inch plus needs to be stainless steel ,so no rust
another trick to get water cold is use ice cubes

but using a special NO MELT CUTTING blade for plastics you dont need the WET SAW
i am building a very good robot machine shop with every machine neededi ordered many machines,lathe,mill and a lot lot more