Polymer Brushes under High Load
نویسندگان
چکیده
Polymer coatings are frequently used to provide repulsive forces between surfaces in solution. After 25 years of design and study, a quantitative model to explain and predict repulsion under strong compression is still lacking. Here, we combine experiments, simulations, and theory to study polymer coatings under high loads and demonstrate a validated model for the repulsive forces, proposing that this universal behavior can be predicted from the polymer solution properties.
منابع مشابه
Polymer Brushes for Silicon Nitride-Steel Contacts: a Colloidal Force Microscopy Study
Introduction Polymer brushes have promising characteristics which could lend themselves to the lubrication of hybrid contacts [1]. In this paper the interaction between surface-initiated polymer bushes grown on silicon nitride and a steel counter contact is investigated. The importance of the hybrid contact relies on silicon nitride and its unique material properties which show clear reductions...
متن کاملDetection of Polymer Brushes developed via Single Crystal Growth
Single crystals consisting various surface morphologies and epitaxial structures were applied to investigate the effect of other phase regions in the vicinity of a given tethered chains-covered area having a certain molecular weight of amorphous brushes. The designed experiments demonstrated that regardless of the type of surface morphology (patterned and especial mixed-brushes, homo and co...
متن کاملStructural Determination of High Density, ATRP Grown Polystyrene Brushes by Neutron Reflectivity
The development of well-controlled synthetic schemes for growing polymer brushes directly from surfaces has recently enabled very high polymer grafting densities to be explored. Here, we report on the structure of polystyrene brushes as a function of molecular weight. The brushes were prepared by atom transfer radical polymerization (ATRP) at a high grafting density of 0.44 chains/nm. The dry f...
متن کاملPoly-Electrolyte Polymer Brushes
It is shown using the mean field theory of Miklavic Marcelja that it should be possible for osmotic pressure due to the counterions associated with the two polyelectrolyte polymer brush coated surfaces (in the absence of excess salt) to support a reasonable load (i.e., about 105Pa)with the brushes held sufficiently far apart to prevent entanglement of polymers belonging to the two brushes, thus...
متن کاملGiant, voltage-actuated deformation of a dielectric elastomer under dead load
Related Articles A new numerical approach to dense polymer brushes and surface instabilities J. Chem. Phys. 136, 044903 (2012) Modifying thermal transport in electrically conducting polymers: Effects of stretching and combining polymer chains J. Chem. Phys. 136, 044901 (2012) Note: Percolation in two-dimensional flexible chains systems J. Chem. Phys. 136, 046101 (2012) Microstructure, transport...
متن کامل