Time‐dependent light scattering from singly and multiply stranded linear polymers undergoing random and endwise scission

1995 ◽  
Vol 103 (17) ◽  
pp. 7576-7584 ◽  
Author(s):  
Wayne F. Reed
Keyword(s):  
Light Scattering ◽  
Time Dependent ◽  
Linear Polymers

Random coil scission rates determined by time-dependent total intensity light scattering: Hyaluronate depolymerization by hyaluronidase

Biopolymers ◽  
1990 ◽  
Vol 30 (11-12) ◽  
pp. 1073-1082 ◽  
Author(s):  
Wayne F. Reed ◽  
Christopher E. Reed ◽  
Larry D. Byers
Keyword(s):  
Light Scattering ◽  
Time Dependent ◽  
Random Coil

Structure of Polybutadienes

1967 ◽  
Vol 40 (5) ◽  
pp. 1529-1543 ◽  
Author(s):  
W. S. Bahary ◽  
D. I. Sapper
Keyword(s):  
Light Scattering ◽  
Molecular Size ◽  
Structural Features ◽  
Melting Point Depression ◽  
Linear Polymers ◽  
Long Chain Branching ◽  
Molecular Weights ◽  
Catalyst Systems ◽  
Molecular Size Distribution

Abstract Polybutadienes made with six different catalyst systems were examined: (1) butyllithium, (2) “nickel-based”, (3) alfin, (4) “titanium-based”, (5) “cobalt-based”, and (6) free radical emulsion. The microstructure and macrostructure of the polybutadienes have been determined and are compared to the results published in the literature. These polybutadienes may be considered to be random terpolymers of cis, trans, and vinyl addition of butadiene. The glass transition temperature is specified by the vinyl content. The crystalline melting points of the high trans and also the high cis polybutadienes obey to a high measure Flory's equation for melting point depression of a random terpolymer. The molecular weights of the polybutadienes have been determined by light scattering and osmometry and the degree of long chain branching has been determined by the branching index, 〈g′〉. The macro-structural features of the linear polymers are confirmed by fractionation. However, the polydispersities calculated from fractionation data do not agree with those determined from light scattering and osmometry for the branched samples. The discrepancy is attributed to the method of characterization of the fractions. A distinction is made between molecular weight distribution and molecular size distribution.

Observation of time-dependent single-particle light scattering from gold nanorods and nanospheres by using unpolarized dark-field microscopy

2006 ◽  
Author(s):  
Vladimir A. Bogatyrev ◽  
Lev A. Dykman ◽  
Anna V. Alekseeva ◽  
Boris N. Khlebtsov ◽  
Anna P. Novikova ◽  
...  
Keyword(s):  
Light Scattering ◽  
Gold Nanorods ◽  
Single Particle ◽  
Dark Field ◽  
Time Dependent ◽  
Dark Field Microscopy

The Applications of Light Scattering

1971 ◽  
Vol 25 (5) ◽  
pp. 509-516 ◽  
Author(s):  
C. C. Gravatt
Keyword(s):  
Molecular Weight ◽  
Air Pollution ◽  
Light Scattering ◽  
Scattered Radiation ◽  
Time Dependent ◽  
Molecular Weight Determination ◽  
Scattered Intensity ◽  
Static Properties ◽  
Diffusion Phenomena ◽  
And Diffusion

Light scattering provides information concerning the size, shape, number, and time dependence of the physical nonuniformities of a system. Measurements of the scattered intensity as a function of both scattering angle and wavelength describe static properties, whereas the spectral distribution of the scattered radiation is related to time dependent phenomena. The applications of light scattering are discussed, including critical phenomena, molecular weight determination, air pollution analysis, and diffusion phenomena.

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