1995
DOI: 10.1021/ed072p284
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Spectrofluorimeters as Light-Scattering Apparatus: Application to Polymers Molecular Weight Determination

Abstract: The determination of the molecular weight is one of the most i m~o r t a n t laboraton, methods for characterizing anv -.chemical compound. I t is not therefore surprising that a wide variety of methods are described in the educational literature. This area is particularly important for polymer characterization a s recoenized in a recent monomaoh (1) and papers hy Mathias 'i2) and Hardgrove et a c (3j who include one molecular weight determination for polymer and physical chemistry laboratory courses. Table 1 … Show more

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Cited by 15 publications
(14 citation statements)
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“…When not being used for measurements, all samples were kept in the absence of light. Light scattering experiments were performed on the polyelectrolyte solutions with the same spectrofluorimeter using the method described by Mougán and co-workers [ 37 ], with excitation and observation at 500 nm (slit width 0.5 mm). The system used for electrical conductivity measurements has been described in detail elsewhere [ 30 , 36 ].…”
Section: Methodsmentioning
confidence: 99%
“…When not being used for measurements, all samples were kept in the absence of light. Light scattering experiments were performed on the polyelectrolyte solutions with the same spectrofluorimeter using the method described by Mougán and co-workers [ 37 ], with excitation and observation at 500 nm (slit width 0.5 mm). The system used for electrical conductivity measurements has been described in detail elsewhere [ 30 , 36 ].…”
Section: Methodsmentioning
confidence: 99%
“…58 Light scattering experiments were performed on solutions of PBS-PFP (4.9 Â 10 À3 g L À1 ) in dioxane-water with composition ranging from 0 to 25% (v/v) dioxane with the same SPEX Fluorolog spectrofluorimeter using the method described by Mouga´n and co-workers. 59 The same excitation and observation wavelengths of 500 nm were used with a bandwidth of 0.5 mm.…”
Section: Instrumentation and Methodsmentioning
confidence: 99%
“…Static light scattering measurements were carried out using a Spex 111 spectrofluorimeter in 90 • configuration with the excitation monochromator set at 330 nm, and the emission spectrum scanned between 360 and 390 nm, following the indications of Mougán et al [21] 1.25 nm excitation and emission slits were used.…”
Section: Fluorescence Techniquementioning
confidence: 99%