Adsorption Features Of Polyfunctional Oligomers

Category: VI Ukrainian-Polish Symposium

ADSORPTION FEATURES OF POLYFUNCTIONAL OLIGOMERS

ON THE GLASS CARBON

A.S. Zaichenko1, S.A. Voronov1, M.O. Kovbuz2, N.Ye. Mitina1

1National University "Lvivska Polytechnica", Lviv, Ukraine

2Lviv Ivan Franko National University, Lviv, Ukraine

The problem of studying of adsorption of polyfunctional initiating system on the base of organic and inorganic extenders has arisen with receiving of new filled copolymer composition. On this, first of all, the selection of optimal conditions of modification of surface extenders with various types of polyfunctional peroxides is grounded.

We have investigated the kinetics of forming of oligocopolymer (OP) adsorbed layers of vinyl acetate (VA), 2-tert-butyl-peroxy-2-methyl-5-hexene-3-yne (VEP), maleinic acid (MA) or its anhydride (MAN) in proportions VA-VEP-МA=1:1:1, VA-VEP-MAN=1:1:1, and also metal complexes (ОМC) of the latter with contain of 0,45% and 0,80% [Cun+] on the surface of glass carbon plates. Control of kinetics of adsorption of oligomer with methanol solution was carried out with using potentiometry method under conditions of external potential absence. At OP adsorption the electron-seeking properties of glass carbon electrode grow which testifies to essential increasing of concentration of electrophilic macromolecular groups on the interphase barrier. The initial potentials Е0 of both OP (VA-VEP-MA, VA-VEP-MAN) are higher than Е0 of ОМC independently of coordinated [Cun+] ions contain.

Obtaining of OP adsorption from methanol solution after their 24 - hours exposition showed that the initial rate of surface layer forming in this case is lower in comparison with fresh solutions. The formation of saturated surfaced layers of OMC with fresh solutions proceeds about 25 – 30 minutes. Its potential final value Еf does not exceed of 0,45 – 0,55V. The main difference between Е0 and Еf points at the restructure of adsorbed layers in time. An active mixing of OMC solution at adsorption equilibrium does not almost influenced on Еf value changes.

These phenomena may be explained by absence of surface net formed from adsorbed OP macromolecules and creation this net under presence of coordinated [Cun+] ions in OMC macromolecules.



Related articles::

  • Oligomerization Of The Vinyl Monomers
  • Archangel Michael And The Balance
  • Studies Of Ion Exchange Equilibria
  • Analysis Of Water Vapour Sorption Isotherms
  • Researches Of The Variability Of Some Factors,
  • Gc-ms Determinaton Of Missile Fuels In Water And Soil By Derivatization With Aromatic Aldehydes
  • Adsorption Of Water And Organics
  • Adsorption Of Na+ Ions On Sol-gel Films
  • Application Of Carbonaceous Adsorbents
  • Thermal Desorption Mass Spectrometry
  • Studies Of The Electrochemical Activity Of Thiobensoalides At The Mercuty Electrode
  • New Way To Increase Catalyst Activity
  • Adsorption Of Cadmium On Acid-modified Transcarpathian Clinoptilolite
  • Jon-exchange Ability Of The Synthetic Ceolit
  • Zeolite-containing Microspheres On The Basis
  • The Studies Of The Polar And Apolar Liquid Film Properties On Pure And Modified Activated Carbons By Means Of The Thermal Analysis
  • The Study Of Dinamic Sorption Oil And Oil Products From Water Medium By Carbon Sorbents Based
  • The Estimation Of The Total Heterogeneity
  • Structural And Adsorptive Characteristics
  • Impact Of Some Organics On Structural
  • Synergizm Of Properties Of Biocatalysts On The Basis Of Mixed Carbon-mineral Sorbents
  • Regeneration Of Carboxylic Acrylic Cationexchange Resins By Stochiometric Amount
  • A New Approach To Determination
  • Aqueous Suspensions Of Polymethylsiloxane
  • Modification Of Structure And Properties
  • The Role Of Zooplankton In Nutrition
  • The Studies Of The Vicinal Water Properties By Means Of The Thermal Analysis Techniques
  • Towards Protection Of The Dniester River Lower Stream Wetlands Of Moldova1