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Measurement of Interfacial Curvatures in micro-phase separated bicontinuous structures using small-angle neutron scattering Hit : 583

S. H. Chen, S. M. Choi and P. LoNostro

Vol. 20, 1971 - 1988, (1998)

 http://hdl.handle.net/10203/77160

Abstract

A method for SANS data analysis is proposed which enables one to directly compute the average mean, Gaussian and square mean curvatures of the interface in systems with a micro-phase-separated bicontinuous structure. This method also leads to a Sd reconstruction of the connected internal interface which allows one to visualize the mesoscopic scale morphology of the material, The method has been successfully applied to various bicontinuous structures such as: microemulsions made of surfactant, water and oil, porous silica glasses and phase-separated homopolymer blends. In this lecture, we show examples of analyses of SANS data taken from one-phase bicontinuous microemulsions at the hydrophile-lipophile-balance temperature and a light scattering intensity taken from a symmetric micro-phase-separated polymer blend at the late stage of spinodal decomposition.