Small angle light scattering polymers

Tant, M. R. and Culberson, W. T., Effect of molecular weight on spherulite growth rate of poly(ethylene terephthalate) via real-time small angle light scattering, Polym. Eng. Sci., 33, 1152-1156 (1993). 

J. van Egmond and G.G. Fuller, Time dependent small angle light scattering of shear-induced concentration fluctuations in polymer solutions, J. of Chem. Physics, 96, 7742 (1992). 

B. Ernst and P. Navard, Shear flow of liquid-crystalline polymer solutions as investigated by small-angle light scattering techniques, Macromolecules, 23,... 

Cylindrical structures of finite thickness were consistent with the small angle light scattering (SALS) data obtained on hydrated poly(2-hydroxyethyl methacrylate), a polymer similar to those used for reverse osmosis membranes ( ). 

Kyu et al. (2) and Ree et al. (3,5) studied blends of LLDPE-B (114,000 M , 4.50 PDI, and 18 ethyl branches per 1000 backbone carbons) and LDPE (286,000 M, 15.98 PDI, and 26 short and 1.6 long branches per 1000 backbone carbons) using in situ small-angle light scattering (SALS) and DSC and found that these blends are miscible across the whole composition range. Similar miscibihty results were reported for LDPE blends with LLDPE-B and LLDPE-O polymers by other research groups. The DSC and DMTA analysis of Lee et al. (43) confirmed that the blends of LLDPEs (LLDPE-B 89,300 M, 3.8 PDI, and 15-16 branches per 1000 backbone carbons LLDPE-O 93,100 M, 3.6 PDI, and 15-16 branches per 1000 backbone carbons) and LDPEs (73,000-98,000 and 8.7-9.2 PDI 32-34 branches per 1000... 

Microscopic examination (OM), small angle light scattering (SALS), scanning (SEM) or transmission electron microscopy (TEM) wide (WAXS) and small angle X-ray scattering (SAXS) spectroscopy are other techniques usually necessary to characterize fully the polymer crystal morphology but will not be dwelt upon in this chapter. 

Small-angle light scattering (sals) can be used if polymers are able to scatter light because of density or birefringence fluctuations in the order of wavelength of the light, eg, in the case of spherulites. 

V. Castelletto and I. W. Hamley, Capillary flow behavior of wormlike micelles studied by small angle X-ray and small angle light scattering. Adv. Polym. TechnoL, 17,137-144 (2006). 

Small angle light scattering (SALS) uses light of wavelength 0.5 pm, so can investigate structures in the range 5-100 pm. Spherulites are structures of semicrystalline polymers which are in this size... 

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