Polymerization by phase transfer catalysis—5. Polycarbonates from diphenols with aromatic side groups

✍ Scribed by L.H. Tagle; F.R. Diaz

• Publisher: Elsevier Science
• Year: 1987
• Tongue: English
• Weight: 310 KB
• Volume: 23
• Category: Article
• ISSN: 0014-3057
• DOI: 10.1016/0014-3057(87)90019-x

✦ Synopsis

Polycarbonates were synthesized from phosgene and three different diphenols under phase transfer conditions, using quarternary ammonium and phosphonium salts and dichloromethane as solvent. The polycarbonates were characterized by i.r. and ~H-NMR; the molecular weights were estimated from inherent viscosity measurements. The influences of the catalysts and the structure of the diphenol were studied; both exert an important effect on the molecular weights. The hydrolysis of the polycarbonates was studied by the variation of the qmh values, the polymer undergoes a hydrolytic process in the organic phase, influenced by the catalysts, according to their structure.