Stability, antibacterial ability, and inhibition of 'zinc burning' of amitrole as thermal stabilizer for transparent poly(vinyl chloride)

摘要

Amitrole is reported as a novel kind of transparent poly(vinyl chloride) (PVC) thermal stabilizer that has both excellent inhibition of zinc burning thermal stability and antibacterial ability in this paper, which provide the possibility of applying the whole PVC industry into medical and food packaging, artificial leather, wire and cable, indoor decoration, and so on. From the results of Congo red test, discoloration test, and dynamic thermal stability test, we could clearly find out that amitrole could effectively replace the unstable chlorine atom and inhibit zinc burning of transparent PVC, while the long-term stability should be improved. Next, the stabilization mechanism of amitrole was also confirmed. The antibacterial activity of amitrole was measured by the bacteriostatic ring experiments. It was observed that the PVC films had good antibacterial properties after modified by amitrole. At last, optimal design of the amitrole/ZnSt(2) (1:1)/ESBO formulation was studied, which have strong potential as thermal stabilizer to prepare super transparency and antibacterial PVC resin.