CRITICAL OPALESCENCE OF POLYSTYRENE IN CYCLO-HEXANE RANGE OF MOLECULAR FORCES AND RADIUS OF GYRATION
Abstract
Visible light scattered by binary mixtures of critical concentration of ordinary molecules at small temperature distances above the critical temperature shows an angular dissymmetry which can be related to the range of molecular forces. The theory of critical opalescence is extended to polymer solutions of high molecular weight for which an additional dissymmetry due to the extension of the polymer coil is observed. The range of molecular forces and the radius of gyration at the critical concentration can be determined simultaneously by measurements of the angular dependece of scattered intensity at different temperatures above the critical temperature. Results of experiments on a solution of polystyrene (M sub n = 2,820,000) in cyclohexane are reported. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1961
- Accession Number
- AD0264360
Entities
People
- B. Chu
- P. Debye
Organizations
- Cornell University