Abstract
Intrinsic viscosity measurements were carried out on polystyrene and polyvinylpyridine solutions in various solvents and solvent mixtures. The Stockmayer-Fixman extrapolation was applied to the date: it yields the unperturbed dimensions K θ of the chain. A unique value of K θ was found for a given polymer in all pure solvents, as expected; in the case of binary mixtures, the K θ value is found higher or lower than this unique value, depending upon the thermodynamic parameter x 12 characterizing the solvent mixture. According to these results, the properties of θ-solutions (as defined classically for pure solvents) should not be extended to ternary systems, since K θ does not depend solely on temperature.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
