Preferential adsorption of low‐molecular‐weight polycaprolactone on CaCO₃

The influence of the adsorbent amount on the changes in molecular mass distribution of polymers under adsorption from mixtures

“…In accordance with Felter [14,15], one can suppose that under the adsorption of polar PBMA there is an irreversible adsorption of initially adsorbed macromolecules of the smaller molecular mass in the extended conformation on the surface with the greater number of strong hydrogen bonds.…”

“…In studies of polymer adsorption on liquid/solid interfaces by means of gel-permeation chromatography, Felter found out [14,15,17,18] that the adsorption selectivity of different fractions depends on the chemical nature (polarity) of the polymer. In particular, for adsorption of poly(caprolactone) (PCL) on the CaCO 3 from the solutions in chlorbenzene, the molecules of lower molecular mass are adsorbed preferentially, in contrast to adsorption of the polyvinyl chloride (PVC)-chlorbenzene-CaCO 3 system, where the preferential adsorption of the high-molecular-mass fraction is observed.…”

“…Thoroughly investigating the problem, a lot of authors showed that one should take into account a number of factors, namely the polymer polydispersity [1,13], its affinity to the adsorbent surface (chemical nature) [14,15], the range of solution concentrations [6,9], the thermodynamic quality of the solvent [1,10,11], and the adsorbent porosity [9,16].…”

Monolayers of Amphiphilic Block Copolymers via Physisorbed Macroinitiators

“…The hydrophobic buoy block was polymerized in situ, resulting in a block copolymer monolayer (Figure b). Poly(ε-caprolactone) was used as an example for a suitable anchor block as it is known to physisorb to hydrophilic surfaces. − Thus, an oligomeric poly(ε-caprolactone) macroinitiator containing azo moieties was synthesized and adsorbed to silicon oxide surfaces. The surface-attached monolayer was subsequently used for free radical chain initiation of the polymerization of n -alkyl methacrylates.…”

“…Poly( -caprolactone) was used as an example for a suitable anchor block as it is known to physisorb to hydrophilic surfaces. [19][20][21] * To whom correspondence should be addressed. Phone +49-6131-379-162; fax +49-6131-379-100, e-mail ruehe@ mpip-mainz.mpg.de.…”