Publications - 1982
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Estimates of the bound fraction of an adsorbed polymer at the solid-liquid interface. Exact enumeration study of a self-avoiding walk model
Terence Cosgrove
School of Chemistry, University of Bristol, Bristol, UK
Macromolecules (1982), 15(5), 1290-3
Abstract
Exact enumeration results of terminally attached self-avoiding walks on the tetrahedral lattice were used to calc. <p>, the fraction of polymer segments of an adsorbed polymer lying in an interface, as a function of the adsorption energy (ε). Neville table ests. were used to extrapolate the <p> results to infinite chain lengths as a function of ε. Below a crit. value of ε, <p> varied inversely with the d.p. Comparisons of <p> ests. on various lattices were also made.
Neutron scattering, pulsed nuclear magnetic resonance and photon correlation studies of partially-hydrolyzed poly(vinyl acetate) adsorbed on a polystyrene latex dispersion in water
K. Barnett, T. Cosgrove, T. L. Crowley, T. F. Tadros and B. Vincent
School of Chemistry, University of Bristol, Bristol, UK
Editor(s): T. F. Tadros Eff. Polym. Dispersion Prop., [Proc. Int. Symp.] (1982), Meeting Date 1981, 183-97. Publisher: Academic, London, UK
Abstract
Three spectroscopic techniques were used to det. various parameters assocd. with the mol. configuration of partially-hydrolyzed poly(vinyl acetate) adsorbed on polystyrene latex particles dispersed in water; these include the second moment of the adsorbed polymer segment d. distribution (σ), the bound fraction (p), and the hydrodynamic thickness (δ) as a function of mol. wt. and coverage. σ decreases and p increases with decreasing coverage, whereas σ increases and p decreases with increasing mol. wt. The σ value is appreciably less than δ, suggesting that the majority of polymer segments lie relatively close together. In one instance, an approx. form of the segment d. distribution, ρ(Z), for the adsorbed polymer was detd. exptl.
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