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Trends in the adsorption of mono‐end‐capped polystyrenes onto polar substrates: Theoretical predictions and experimental observations
Author(s) -
Jian Zhang,
Zajac Richard,
Chakrabarti Amit,
Dyakonov Tania,
Guo Xiaoyen,
Sorensen Chris,
Burns Dennis,
Stevenson William T. K.
Publication year - 2000
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/(sici)1097-4628(20000531)76:9<1422::aid-app7>3.0.co;2-c
Subject(s) - substrate (aquarium) , adsorption , polymer , dimensionless quantity , polymer chemistry , materials science , solvent , polystyrene , polar , dispersity , chemical engineering , chemistry , thermodynamics , organic chemistry , composite material , physics , astronomy , oceanography , engineering , geology
Predictions of the influence of the solvent quality (χ), the segment–substrate interaction parameter (χ ps ), the chain length ( N ), and the end cap–substrate interaction parameter (Δ) on the equilibrium‐adsorbed amount from a dilute solution of end‐functionalized homopolymers (Γ) onto a solid substrate, when both the end cap and polymer segments compete for sites on the surface, were made through application of the self‐consistent‐field (SCF) theory. These predictions were tested and evaluated through measurement of the equilibrium‐adsorbed amount, from a dilute solution of single‐end‐functionalized custom synthesized relatively monodisperse polystyrenes, possessing an end group (X) chosen to interact with a mildly acidic inorganic substrate (Aerosil 130) and a mildly basic inorganic substrate (aluminum oxide C) through dipole–dipole interactions, hydrogen‐bonding interactions, and specific acid–base interactions, as a function of χ, χ ps , Δ, and N . A protocol was developed for the numerical estimation of Δ through the establishment of dimensionless ratios of the type Γ X /Γ H , by experiment and through SCF calculation, as a function of Δ, for polymer/solvent/substrate systems characterized by specific combinations of χ, χ ps , and N . © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 76: 1422–1447, 2000