Fluorescence and absorbance of polystyrene in dilute and semidilute solutions

Journal Article · Tue Feb 01 04:00:00 EST 1983 · Macromolecules; (United States)

DOI:https://doi.org/10.1021/ma00236a031· OSTI ID:6616185

Torkelson, J M; Lipsky, S; Tirrell, M; Tirrell, D A

The fluorescence and absorbance of polystyrene in solution have been measured over a wide concentration range for several molecular weights and solvents (cyclohexane, 1,2 dichloroethane). The absorbance at wavelengths below 280 nm for these molecular weights and solvents is found to be insensitive to the transition between dilute and semidilute solutions. Self-absorption of the fluorescence results in a much reduced observed monomer emission at high concentration. When this is corrected, the ratio of excimer to monomer fluorescence intensity, I/sub E//I/sub M/, is essentially constant at low concentrations and at most increases only very slowly and smoothly at higher concentrations. No significant molecular weight or solvent effects on the concentration dependence of I/sub E//I/sub M/ are manifested for these molecular weights and solvents over the concentration range studied. Contrary to previous reports, fluorescence spectroscopy reveals no abrupt transition between dilute and semidilute solutions. 30 references, 6 figures, 4 tables.

• Research Organization: Univ. of Minnesota, Minneapolis
• OSTI ID: 6616185
• Journal Information: Macromolecules; (United States), Journal Name: Macromolecules; (United States) Vol. 16:2; ISSN MAMOB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360402* -- Polymers & Plastics-- Structure & Phase Studies-- (-1987)
ABSORPTION SPECTROSCOPY
ALKANES
CHLORINATED ALIPHATIC HYDROCARBONS
CYCLOALKANES
CYCLOHEXANE
DATA
EMISSION SPECTROSCOPY
EXPERIMENTAL DATA
FLUORESCENCE SPECTROSCOPY
HALOGENATED ALIPHATIC HYDROCARBONS
HYDROCARBONS
INFORMATION
MATERIALS
NUMERICAL DATA
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC POLYMERS
ORGANIC SOLVENTS
PETROCHEMICALS
PETROLEUM PRODUCTS
PLASTICS
POLYMERS
POLYOLEFINS
POLYSTYRENE
POLYVINYLS
QUANTITY RATIO
SOLVENTS
SPECTROSCOPY
STRUCTURAL CHEMICAL ANALYSIS
SYNTHETIC MATERIALS