A two‐dimensional position‐sensitive detector for small‐angle light scattering

Tabar, R. J.; Stein, Richard S.; Long, Marshall B.

doi:10.1002/pol.1982.180201106

Cited by 30 publications

(18 citation statements)

References 19 publications

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“…More recently, quantitative and two-dimensional results have been made possible because of the availability of commercial bidimensional detectors that could be coupled with a computer for rapid and easy data acquisition. A number of groups (9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19) have constructed automated SALS systems using different detectors, such as a vidicon detector coupled with an optical multichannel analyzer (OMA). However, these detectors are restricted to an intensity resolution of 256 levels or 8 bits.…”

Section: Description Of the Sacs Apparatusmentioning

confidence: 99%

Time‐resolved small‐angle light scattering for the study of phase separation kinetics in bisphenol‐a polycarbonate/poly(methy methacrylate) blends

Perreault

Prud’homme

1995

Polymer Engineering & Sci

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An automated, solid‐state small‐angle light scattering apparatus has been constructed for the investigation of polymers; the main features of this system are a bidimensional CCD (charge coupled device) detector with 12‐bit resolution and custom‐made, user‐friendly software for the acquisition and treatment of the scattering data. The miscibility and phase separation kinetics of several bisphenol‐A polycarbonate/poly(methyl methacrylate) blends have been investigated using this apparatus. It was found that the rate of phase separation can be altered significantly by replacing part of the polydisperse poly(methyl methacrylate) (PMMA) in the blends by monodisperse PMMA.

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Section: Description Of the Sacs Apparatusmentioning

confidence: 99%

Time‐resolved small‐angle light scattering for the study of phase separation kinetics in bisphenol‐a polycarbonate/poly(methy methacrylate) blends

Perreault

Prud’homme

1995

Polymer Engineering & Sci

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“…In applications utilizing the present IAPA system, one must work within the limitations of the device and design the experiments accordingly. In comparison with the probably most advanced device for small-angle light scattering measurements [8], the present system has more universal character, better resolution (about 60 times more data points) and faster detection (approx. 10 s versus 1/30 s).…”

Section: Small-angle Light Scattering From Sernicrystalline Polymersmentioning

confidence: 99%

“…Such a significant scattering ring indicates the existence of a welldefined correlation length developing during the phase separation process, which is the wavelength of a dominant spatial component of the concentration fluctuations in the system. The Fourier component of the especially with respect to the speed and completeness of data acquisition [7,8]. Rapid detection and processing of two-dimensional scattering patterns are the principal advantages of the present system.…”

Section: Time-resolved Studies On Kinetics Of Phase Separationmentioning

confidence: 99%

Application of interactive image analysis to light scattering patterns of some polymer systems

Krug

Holoubek

Fischer

1987

Colloid & Polymer Sci

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In this paper we describe a system for interactive picture analysis useful for extraction of various types of physical information from both real-and Fourier-space images. The possibility of hardware and software operations are illustrated, with examples of applications such as analysis of light scattering patterns from phase separated systems, semicrystalline polymer films with significant supermolecular morphology and from less regular polymer systems with a pronounced "speckle effect". The analysis concentrates on both spatial and time dependent scattering processes and measurements of intensity correlation of scattered light. Although the present examples of application are limited to light scattering patterns of polymer systems, the technique of interactive picture analysis is useful for quantitative extraction of information from real-and Fourierspace images of arbitrary structure.

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“…The small-angle light scattering device consisting of a twodimensional optical multichannel analyzer (OMA3, by EG&G PARC, Princeton, NJ), a 2mW He-Ne laser, and assemblies of optical components, was utilized to characterize the polymer films. The detail of this device has been described before [12].…”

Section: Instrumentationmentioning

confidence: 99%

Light Scattering Studies of the State of Dispersion in Molecular Composites

1989

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Polymer solutions comprising stiff-chain polyester and flexible polysulfone were examined via light scattering techniques. Results were analyzed using the SteinWilson extension of the Debye-Bueche theory, in which the correlation lengths due to orientation fluctuations and mean-squared fluctuations of the molecular anisotropy were obtained. For a molecular dispersion, the correlation length is small and a function of concentration; as the anisotropy is attributed to the rod molecules. Aggregation of rods is associated with an increase in the magnitude and size of the density fluctuations, and a change in anisotropy fluctuations is dependent on the degree of orientation correlation of the rods in the aggregate. Blends prepared by solution casting were studied by a small-angle light scattering method. Results thus far demonstrate that aggregates are present in most of the rod/coil composites prepared.

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A two‐dimensional position‐sensitive detector for small‐angle light scattering

Cited by 30 publications

References 19 publications

Time‐resolved small‐angle light scattering for the study of phase separation kinetics in bisphenol‐a polycarbonate/poly(methy methacrylate) blends

Time‐resolved small‐angle light scattering for the study of phase separation kinetics in bisphenol‐a polycarbonate/poly(methy methacrylate) blends

Application of interactive image analysis to light scattering patterns of some polymer systems

Light Scattering Studies of the State of Dispersion in Molecular Composites

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