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The Mobility Restriction of Nonadsorbing Polymer Segments by Adsorption from Polymer Mixtures

โœ Scribed by Valentine Chornaya; Tamara Todosijchuk; Yuri Lipatov


Publisher
Elsevier Science
Year
1998
Tongue
English
Weight
161 KB
Volume
198
Category
Article
ISSN
0021-9797

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โœฆ Synopsis


lecular chain mobility due to selectivity of the adsorption

The adsorption, adsorption layer structure, and molecular mointeraction. Studies on the molecular mobility of polymer bility in thermodynamically different systems (miscible polycarbochains adsorbed from polymer mixture solutions under connate (PC) -poly-e-caprolactone (PCL) -chloroform (CHCl 3 ) ditions of adsorption equilibrium (3) have shown the relaand immiscible polystyrene (PS) -poly(butyl methacrylate) tionship between the molecular mobility of adsorbed poly-(PBMA) -carbon tetrachloride (CCl 4 )) have been studied using mer chains and the adsorption mechanism. These data allow high resolution NMR spectroscopy. It was found that the molecuestimation of the molecular mobility of adsorbed chains in lar mobility of nonadsorbing polymer in a definite concentration complicated adsorption systems under conditions of changrange was restricted for both systems investigated. In the thermoing equilibrium depending on the polymer concentration, dynamically immiscible system PS is not adsorbed on the solid surface, but the mobility of PS segments is restricted due to their the adsorbent/solution ratio, and the temperature. We have topological entanglement with the adsorbed PBMA macromoleshown that molecular mobility depends on the adsorption cules and aggregates. As distinct from immiscible pairs, in a miscimechanism, i.e., on whether macromolecules are adsorbed ble system, in addition to the topological interaction between PS as isolated coils or as macromolecular aggregates. We found aggregates and macromolecules and PCL macromolecules, one that simultaneous adsorption of two polymers onto a solid should take into account the formation of the common aggregates surface causes unusual behavior of the molecular mobility for both polymers at concentrations above C*. Adsorption of these due to selectivity of the adsorption interaction.

aggregates causes restriction in the molecular mobility of both

The present paper deals with some peculiarities of molecupolymers.


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Simultaneous competitive adsorption from solutions of mixtures of poly(butyl methacrylate) and polystyrene and adsorption of each component from binary solutions have been studied for three ratios of the adsorbent mass to the solution volume, A/V. It was found that adsorption from both binary and te