Almract--Adiabatic compressibility measurements of solutions of bisphenol A polycarbonate in a number of different solvents, including a 0-mixture, have been carried out. The results were used to estimate the number of solvent molecules solvating each repeat unit of the polymer. Tentative mechanisms
Dilute solution properties of bisphenol a polycarbonate—II
✍ Scribed by W.R Moore; M.A Uddin
- Book ID
- 107753173
- Publisher
- Elsevier Science
- Year
- 1970
- Tongue
- English
- Weight
- 304 KB
- Volume
- 6
- Category
- Article
- ISSN
- 0014-3057
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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 param
Values of Q and A in the expression ~ = A exp (Q/RT)have been obtained for dilute solutions of fractions of a Bisphenol A polyearbonate in five solvents. The apparent activation energy of viscous flow Q varies with concentration c and molecular weight M according to where Q0 refers to the solvent a
Almlmet--Dilute solution properties of Union Carbide polysuiphone have been measured by light scattering, osmometry, and viscometry; Mark-Houwink expressions have been determined in a thermodynamically good solvent, two thermodynamically bad solvents, and one solvent at the 0-temperature. The follo