Infrared and microcalorimetric studies of the adsorption of polymers with ester groups, in the main or side chain, at the silica/carbon tetrachloride interface

Korn, Milan; Killmann, E.

doi:10.1016/0021-9797(80)90267-2

Cited by 33 publications

(14 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The peaks centered at about 1740 and 1710 cm 21 were for free carbonyls and carbonyls bound to the silica surface, respectively. This observation was consistent with literature results for adsorbed PVAc 8,9,17,25 and adsorbed PEVAc. 17,25,27 The peak centered around 1630 cm 21 was attributed to water adsorbed on silica surface.…”

Section: Resultssupporting

confidence: 94%

See 1 more Smart Citation

Thermal analysis and FT‐IR studies of adsorbed poly(ethylene‐stat‐vinyl acetate) on silica

Maddumaarachchi

Blum

2014

J Polym Sci B Polym Phys

View full text Add to dashboard Cite

Adsorbed poly(ethylene‐stat‐vinyl acetate) (PEVAc) on fumed silica was studied using temperature‐modulated differential scanning calorimetry (TMDSC) and FT‐IR spectroscopy. The properties of the copolymers were compared with poly(vinyl acetate) (PVAc) and low density polyethylene (LDPE) as references. TMDSC analysis of the copolymer‐silica samples in the glass transition region was complicated for the copolymers because of the ethylene crystallinity. Nevertheless, examination of the glass transition region for small adsorbed amounts of these copolymers indicated the presence of tightly‐ and loosely‐bound polymer segments, similar to other polymers which have an attraction to silica. Compared with bulk polymers with the same composition, the tightly‐bound polymers showed an increased glass transition temperature (Tg) and a loosely‐bound fraction with a lower Tg than bulk. FT‐IR spectra of the surface copolymers indicated that the fraction of bound carbonyls (p) increased as the fraction of vinyl acetate in the copolymers decreased, consistent with the notion that the carbonyls from vinyl acetate preferentially find their way to the silica surface. Spectra from samples with different adsorbed amounts of polymer were used to obtain the amount of bound polymer (Mb) and the ratio of molar absorption coefficients of bound carbonyls to free carbonyls (X). The copolymers had very large p values (up to 0.8) at small adsorbed amounts and dependent on the composition of the polymer. However, an analysis of the bound fractions, based on only the vinyl acetate groups, superimposed the data, suggesting that the ethylene units simply dilute the vinyl acetate groups in the surface polymer. The sample with the smallest fraction of vinyl acetate did not show this behavior and may be considered to be “carbonyl poor.” © 2014 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2014, 52, 727–736

show abstract

Section: Resultssupporting

confidence: 94%

“…Investigating the chemistry and physics of the polymer‐surface interface is important for the development of polymer films with desirable properties for specific applications. Interfacial polymer behavior has been studied for a large number of polymers including those that bind strongly or weakly to the surface.…”

Section: Introductionmentioning

confidence: 99%

Thermal analysis and FT‐IR studies of adsorbed poly(ethylene‐stat‐vinyl acetate) on silica

Maddumaarachchi

Blum

2014

J Polym Sci B Polym Phys

View full text Add to dashboard Cite

show abstract

“…4-6) resulted in adsorption behavior very similar to that found by Korn and Killmann 12 in their studies of nonpeptide homopolymer-surface adsorption with an initial linear relationship followed by a plateau region as the molecular weight of the adsorbed polymer molecules increased. As with Korn and Killmann, 12 the plateau region found in Figures 4-6 is believed to be due to the adsorbed macromolecules retaining a coiled conformation upon adsorption rather than extending along the surface such that the effect of increased molecular length no longer influenced the apparent thermodynamic properties. As expected, the adsorption of a midchain lysine residue onto the glass caused a small decrease in both the apparent system enthalpy and entropy with a net small decrease in the overall apparent system Gibbs' free energy.…”

Section: Discussionmentioning

confidence: 91%

Determination of apparent thermodynamic parameters for adsorption of a midchain peptidyl residue onto a glass surface

Latour

Trembley

Tian

et al. 2000

J. Biomed. Mater. Res.

View full text Add to dashboard Cite

Protein adsorption onto the surface of an implanted material is widely recognized as an important factor controlling the biological response. Although numerous studies have been conducted to investigate protein adsorption behavior, very little is actually understood regarding the specific molecular events involved in protein-surface adsorption processes. As a basic science approach to investigate protein-surface interactions, an experimental method is developed and applied to determine apparent thermodynamic parameters for the adsorption of a single midchain peptidyl residue onto a glass surface. This article presents the results of adsorption studies for four molecular weight ranges of poly-L-lysine onto glass microspheres in physiologic saline at four temperatures. Isotherm data plots are constructed and the apparent changes in enthalpy (DeltaH degrees ), entropy (DeltaS degrees ), and Gibbs' free energy (DeltaG degrees ) are calculated assuming a Langmuir-like model for adsorption. Estimates of apparent DeltaH degrees, DeltaS degrees, and DeltaG degrees for the adsorption of a single midchain lysine residue are determined from the initial slopes of the plots of the apparent thermodynamic parameters versus the degree of polymerization of the adsorbed poly-L-lysine. It is proposed that the generation of such molecular-level adsorption data is a necessary step toward the goal of understanding, predicting, and controlling protein-surface interactions.

show abstract

“…Almost all text books on colloid chemistry note that, by using the equation of Clapeyron-Clausius, one should bear in mind that it gives the differential (isosteric) heat of adsorption, H , namely, the change in enthalpy of an adsorbate (polymer) by its transition from the solution onto the adsorbent surface. This value in no way can be identified with the heat of adsorption which is found from direct calorimetric measurements (15)(16)(17).…”

Section: Resultsmentioning

confidence: 96%

“…From their slope the changes in the enthalpy of a polymer by its transition from solution onto the adsorbent surface were calculated according to the Clapeyron-Clausius equation. As this measurement is distinct from the heat of adsorption found from direct calorimetric measurements (15,16), this method enables one to estimate the differential heat of adsorption, H , separately for each component adsorbing from the solution, whose thermodynamic quality also changes with temperature. These changes were seen from the temperature dependence of the intrinsic viscosity [η].…”

Section: Methodsmentioning

confidence: 99%

Temperature Dependence of Adsorption of Polymer Mixtures from Solutions

Lipatov

Todosijchuk

Chornaya

2000

Journal of Colloid and Interface Science

View full text Add to dashboard Cite

Infrared and microcalorimetric studies of the adsorption of polymers with ester groups, in the main or side chain, at the silica/carbon tetrachloride interface

Cited by 33 publications

References 14 publications

Thermal analysis and FT‐IR studies of adsorbed poly(ethylene‐stat‐vinyl acetate) on silica

Thermal analysis and FT‐IR studies of adsorbed poly(ethylene‐stat‐vinyl acetate) on silica

Determination of apparent thermodynamic parameters for adsorption of a midchain peptidyl residue onto a glass surface

Temperature Dependence of Adsorption of Polymer Mixtures from Solutions

Contact Info

Product

Resources

About