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Title: A macroscopic theory for surface segregation in and copolymers and polyblends
Authors: Wong, David Shan Hill
Chan, Chi-Ming
Keywords: Gradient theory
Polymer surface segregation
Surface phase transition
Flory-Huggins model
Issue Date: 1999
Citation: Preprints of Second East Asian Polymer Conference, Hong Kong, 12-16 Jan 1999, Hong Kong University of Science and Technology, Hong Kong, 1999, p. 41-47
Abstract: In this work, the gradient theory was used to explain and correlate some of the phenomena observed for polymer surface segregation. The surface segregation data of poly(styrene-co-4-vinylphenol) (STVPh) and poly(styrene-co-4-pyridine) (STVPy) polyblends are explained using the concept of surface phase transition. Experimental data of fully miscible blends poly(vinyl alcohol)+poly(N-vinyl-2-pyrrolidone) blends are correlated using Flory-Huggins model and gradient theory. The SAFT is used to develop a thermodynamic model for copolymer. It is combined with gradient theory o[f] explain the effect of concentration and chain sequencing on surface segregation for the copolymer poly(acrylonitrile-butadiene).
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