1988
DOI: 10.1021/ma00184a041
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Pressure-pulse-induced critical scattering of oligostyrene in n-pentane

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Cited by 29 publications
(11 citation statements)
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“…Pressure is transmitted hydraulically to the samples via a mercury seal, and cloud and spinodal points are detected by a light scattering technique. 1,4,7 In the region of the phase diagram of interest, PS/PN solutions are characterized by upper and lower consolute branches separated by a homogeneous one-phase region (see Figure 1). The most convenient way to determine cloud and spinodal points using the apparatus is to first place the sample into the homogeneous region at elevated pressure, then induce precipitation by lowering pressure, all the while monitoring low-angle scattering intensity.…”
Section: Methodsmentioning
confidence: 99%
“…Pressure is transmitted hydraulically to the samples via a mercury seal, and cloud and spinodal points are detected by a light scattering technique. 1,4,7 In the region of the phase diagram of interest, PS/PN solutions are characterized by upper and lower consolute branches separated by a homogeneous one-phase region (see Figure 1). The most convenient way to determine cloud and spinodal points using the apparatus is to first place the sample into the homogeneous region at elevated pressure, then induce precipitation by lowering pressure, all the while monitoring low-angle scattering intensity.…”
Section: Methodsmentioning
confidence: 99%
“…Scattered (I sc ) and transmitted light (I tr ) are corrected for density fluctuations, reflections, and multiple scattering effects according to Debye (17,18) and Kiepen and Borchard. (19) Following these authors and Luszczyk et al (1) the cloud-point is the point on the 1/I sc,corr against pressure ( p) or temperature (T ) least squares fits where the slope changes abruptly. The operational spinodal point will be taken at the interception point where 1/I sc,corr = 0.…”
Section: Experimental Equipment and Techniquementioning
confidence: 99%
“…Scattered light intensity is captured at very low angle (2 < 2θ (deg) < 4) in the outer part of a bifurcated optical cable [8], while transmitted light is captured in the inner portion of this cable. Scattered (I sc ) and transmitted light (I tr ) are corrected for density fluctuations, reflections, and multiple scattering effects according to Debye's theory [9]. The cloud-point (cp) is the point on the 1/I sc,corr against pressure (P) or temperature (T) least-squares fits where the slope changes abruptly.…”
Section: Equipment and Techniquementioning
confidence: 99%