The aim of this study was to develop a statistical thermodynamic theory for the adsorption of linear flexible block copolymers from a multicomponent solution. This has been accomplished by a more general derivation of the self-consistent field theory of Scheutjens and Fleer for adsorption of homopolymer from a binary mixture, introducing local segm...
A statistical theory for flexible macromolecules at interfaces has been developed. The theory is based on a lattice model in which the equilibrium set of molecular conformations in a concentration profile is evaluated, using a selfconsistent procedure. In this way, the Flory-Huggins theory for polymer solutions is extended to inhomogeneous solution...
Adsorption properties of the polyelectrolytes poly-L-lysine (PL-L) and poly-DL-lysine (PL-DL) on hydrophobic (polystyrene latex, silver iodide) and hydrophilic (silica) negatively charged solid particles were studied.Adsorbed amounts as a function of concentration, ionic strength, surface charge, PI, chain length and chain charge density were deter...
The purpose of this study is the description of the behaviour of a model polyelectrolyte near a model interface.Chapter 1 gives a general background and the outline of the investigations.The chapters 2 and 3 comprise the theoretical parts. Chapter 2 considers the applicability of equilibrium thermodynamics to polymer adsorption, an important prereq...
This study deals with the syneresis of curd. Rennet gels are primarily considered; some comparisons with acid milk gels are given.After curdling the milk, the curd tends to shrink; in other words, the network of aggregated paracasein micelles (PCM) will be under stress. If the curd is cut or - as was the case in our expirements - a curd surface is ...
We undertook the present study in order to evaluate techniques which are devised to assess the comformations of adsorbed macromolecules. Since recent theories deal with these conformations, we also wanted to investigate to what extent these theories are supported by experimental data.In chapter 1 we outline the scope of this study and we give reaso...
The purpose of this study was to investigate how the double layer properties of charged particles are modified by the presence of adsorbed polymer molecules and to obtain information on the conformation of the polymer layer from the observed alterations in the double layer properties.In chapter 1. the use of double layer investigations to obtain in...
In this study we have investigated the interfacial properties of several polyvinyl alcohol-acetate (PVA-Ac) copolymers, which only differ in the content and the intra-molecular distribution of their vinyl acetate monomers (VAc).In chapter I the relevant theoretical and experimental aspects of studies on polymer adsorption are reviewed. Because of e...
The aim of this study was to gain more insight into the factors, determining the inter- and intramolecular interactions between adsorbed macromolecules. To that end several experimental and theoretical approaches were followed, using well-defined systems. It was shown that these interactions could conveniently be studied by measurements on emulsion...
