Premium
Study of the miscibility and the thermal degradation of PVC/PMMA blends
Author(s) -
BelhanecheBensemra Naïma,
Belaabed Belkacem,
Bedda Abdelmalik
Publication year - 2002
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/1521-3900(200203)180:1<203::aid-masy203>3.0.co;2-h
Subject(s) - miscibility , fourier transform infrared spectroscopy , materials science , degradation (telecommunications) , plasticizer , differential scanning calorimetry , thermal analysis , polymer , polymer chemistry , chemical engineering , composite material , thermal , telecommunications , physics , computer science , engineering , thermodynamics , meteorology
The aim of this paper is to study the miscibility and the thermal degradation of PVC/PMMA blends. For that purpose, blends of variable compositions from 0 to 100 wt% were prepared with and without plasticizer. Their physico‐chemical characterization was carried out by differential scanning calorimetric analysis (DSC) and Fourier transform infrared spectroscopy (FTIR). Their thermal degradation under nitrogen at 185°C was studied and the HCl evolved from PVC was measured by the pH method. Degraded samples were characterized, after purification, by FTIR and UV‐visible spectroscopy. The DSC analysis showed polymer miscibility up to 60 wt% of PMMA. This miscibility is due to a specific interaction of hydrogen bonding type between carbonyl groups (C=O) of PMMA and hydrogen from (CHCl) groups of PVC as evidenced by FTIR analysis. On the other hand, it was found that PMMA exerted a stabilizing effect on the thermal degradation of PVC by reducing the zip dehydrochlorination and by leading to the formation of short polyenes.