it works more or less well. We obtain gas and a heterogeneous liquid that must be refined. That's the problem.
there's also another concern, but you have to deal with it, there's chlorine in the PVC, those are a problem.
Some plastics (poly-things) lend themselves well to pyrolysis because by breaking these polymers, only alkanes of variable length are recovered. The gases are a mixture of short-chain, combustible alkanes.