Thermal decomposition of polyamides in the presence of poly(vinyl chloride)

Czegeny, Z [Czégény, Zsuzsanna (Makromolekulák ké...), szerző] Anyag- és Környezetkémiai Intézet (MTA KK); Blazso, M [Blazsó, Marianne (Makromolekulák ké...), szerző] Anyag- és Környezetkémiai Intézet (MTA KK)

Angol nyelvű Tudományos Szakcikk (Folyóiratcikk)
    Azonosítók
    Szakterületek:
      Thermal decomposition of aliphatic and aromatic polyamides (polyamide-12, polyamide-6,6 and poly(1,4-phenylene terephthalamide) (Kevlar)) with poly(vinyl chloride) (PVC) was examined by pyrolysis-gas chromatography/mass spectrometry. Polyamide-PVC mixtures (typical mass ratio 1:1) were pyrolysed at 700 and 900 degreesC. It was found that the presence of PVC promoted the hydrolytic decomposition routes of amide groups and volatile nitrile formation from all examined polyamides due to the hydrogen chloride eliminated from PVC under pyrolysis. In the presence of PVC an elevated yield of alkenenitriles was observed from polyamide-12. Benzeneamine is produced from Kevlar instead of benzenediamine in the presence of PVC, and the evolution of benzoic acid, benzenenitrile and benzeneisocyanate is promoted. At 900 degreesC pyrolysis temperature enhanced hydrogen cyanide evolution was observed from polyamide-12 and polyamide-6,6 in the presence of PVC. Mechanisms are proposed for the hydrogen chloride assisted formation of nitriles. (C) 2001 Elsevier Science B.V. All rights reserved.
      Hivatkozás stílusok: IEEEACMAPAChicagoHarvardCSLMásolásNyomtatás
      2020-09-27 18:09