Dilute solution properties of bisphenol A polycarbonate—I Osmotic, light scattering and viscosity measurements

✍ Scribed by W.R. Moore; M. Uddin

• Publisher: Elsevier Science
• Year: 1969
• Tongue: English
• Weight: 391 KB
• Volume: 5
• Category: Article
• ISSN: 0014-3057
• DOI: 10.1016/0014-3057(69)90116-5

✦ Synopsis

Dilute solutions of ten fractions of a bisphenol A polycarbonate (gl, 7000--77,000) have been examined by osmotic, light scattering and viscometric techniques at 25 °. Of the seven solvents used three are acidic, three basic and one a theta-solvent mixture. Second virial coefficients and other parameters are obtained. The results suggest the following order of thermodynamic solvent power: chloroform ~ methylene chloride > ethylene chloride ~ dioxan ~ tetrahydrofuran > cyclohexanone > dioxan/cyclohexaae. Viscosities lead to the following Mark-Houwink relationships at 2Y: [n] = 1" 12 x IO-'LI~I, °'a2 in chloroform [~7] --1.23 × 10-41~I, °'81s in methylene chloride [rd = 1"42 × 10-4i~, °'~8 in ethylene chloride [71 ----3"09 x 10-4~v °'~ in dioxan [~7l ---4"90 × 10-'L~v °'n7 in tetrahydrofuran [7] = 7-76 x 10"4I~lv °'nz in cyclohexanone [~.] = 21"4 x 10-4~Iv °'5° in dioxan/cyclohexane.