Unless there are excellent reasons, solvent isn't the easier way to go. PVC resists most solvents, they use to be nasty and act slowly, and afterwards they will be loaded with nasty compounds from PVC that you don't want in you body. A compatibility list is there, "severe effect" gives some hope of action:https://www.spillcontainment.com/media/2586/pvc-chem-compat-10-2-15-use-sf-link.pdf
Burning PVC would be much worse.
A mechanical tool
is the standard way to go. The best ones look like thathttps://www.ebay.de/itm/303229718683https://www.ebay.de/itm/303230632614
reliable, accurate, strip short or long PVC length, can cut the copper too.
===== For huge amounts, say at a recycling plant
Try to melt
the PVC, possibly in already liquid PVC from the previous batch, but the fumes will be nasty.
Or could a hot non-volatile solvent
act quickly and reduce the bad fumes from PVC thanks to lower temperature? Most solvents I thought of are associated with health scandals. Maybe diphenyl ether or the mixture Dowtherm A, or phenanthrene, or (flammable!) rosin. Maybe a reasonable salt (no nitrate), possibly hydrated, that melts readily enough like MgCl2
O, if it dissolves PVC. A hot solvent would separate the dissolved PVC just by cooling down.
The big way, using an adequate machine, a condensing solvent
could be efficient and self-cleaning. Tetrachloroethylene worked in dry-cleaners and is a solvent for PVC but its toxicity let phase it out.https://en.wikipedia.org/wiki/Dry_cleaning