Lösungseigenschaften methyl- und chlorsubstituierter Bisphenol-A-Polycarbonate

✍ Scribed by Horbach, Alfred ;Müller, Herbert ;Bottenbruch, Ludwig

• Book ID: 102481059
• Publisher: Wiley (John Wiley & Sons)
• Year: 1981
• Weight: 303 KB
• Volume: 182
• Category: Article
• ISSN: 0025-116X
• DOI: 10.1002/macp.1981.021821031

✦ Synopsis

Abstract

Solution properties of dilute polymer solutions are studied for polycarbonates from 3,3′,5,5′‐tetramethylbisphenol A, from 3,3′‐dimethylbisphenol A, from 3,5‐dimethylbisphenol A, and from 3,3′,5,5′‐tetrachlorobisphenol A in regard to the influences of the different methyl and chloro substitutions. The Mark‐Houwink relationships are established in dichloromethane at 25°C. The unperturbed dimensions, evaluated from viscosity data using the Burchard‐Stockmayer‐Fixman method, are compared with those for bisphenol A polycarbonate. The unperturbed end‐to‐end distances are increased by the methyl and chloro substituents. The flexibility factors, calculated on the basis of the unperturbed dimensions and the dimensions of the freely rotating chain, indicate a greater rigidity of the polymer chain of the methyl and chloro substituted polycarbonates.