A. Kaynak et al., FT-Raman spectroscopic study of the formation of polyenes during thermal degradation of poly(vinyl chloride) and poly (N-vinyl-2-pyrrolidone) blends, J MACR S PU, 38(10), 2001, pp. 1033-1048
Citations number
17
Categorie Soggetti
Organic Chemistry/Polymer Science
Journal title
JOURNAL OF MACROMOLECULAR SCIENCE-PURE AND APPLIED CHEMISTRY
In situ degradation of poly(vinyl chloride)/poly (N-vinyl-2-pyrrolidone) (P
VC/PVP) blends has been studied by Fourier-transform Raman spectroscopy. PV
P acts as a destabilizer in the thermal degradation of PVC as manifested by
the reduction of temperature for the onset of degradation and the time the
polymer is held at a particular temperature for this onset. Increasing the
amount of PVP in the blends decreases the dehydrochlorination temperature
and time. In blends containing high PVP concentrations, polyene bands domin
ate over nondegraded PVC bands. Maximum polyene lengths of around 35 were a
chieved. High PVP ratios and prolonged degradation at higher temperatures r
esulted in a decrease in mean polyene length due to crosslinking and oxidat
ive scission.