Table 4.

Improvement roughness factor (Rq, fold) of PVC films containing various additives.

PVC Additive	Improvement in Rq (Fold)	Reference
Polyphosphates 1–3 containing diethylenetriamine	8.4	Current work
Polyphosphate containing benzidine	16.7	[28]
Organotin (IV) complexes	5.2–16.6	[31,32,33,39]
Schiff bases	3.3–6.0	[19,20,23]