Publication Type:

Journal Article


Physica Status Solidi (C) Current Topics in Solid State Physics, Volume 6, Number 11, Kolkata, p.2404-2406 (2009)



Adhesion strengths, Binary polymer blends, Blend constituents, Blend system, chemical modification, fluid dynamics, Fluorine containing polymers, Free volume, Hydrodynamic interaction, hydrodynamics, Hydrogen bonds, Hydrogen-bond formation, Interface modifiers, Interfacial modification, Irradiation, Microwave irradiation, Miscible blend, Phase interfaces, Phase modification, Polymer blends, Polymers, Positron annihilation, Positron annihilation lifetimes, Positron annihilation spectroscopy, Radiation treatments, Solvent casting


Partially miscible blends of PS/PMMA and PVC/SAN with different compositions have been prepared by solvent casting technique and characterized by Positron Annihilation Lifetime Technique. Phase modification in these systems has been brought out using e- beam and microwave irradiation. These changes have been studied through free volume monitoring. The changes in free volume parameters upon e-beam and microwave irradiation on the two systems clearly shows improved interaction between the blend constituents as a result of cross-linking through hydrogen bond formations. The free volume data indicates the overall changes in the blend with respect to free volume, but the extent of interfacial modification occurred for different weight compositions are not forthcoming upon irradiation. Therefore, the hydrodynamic interaction parameter α which accounts for excess friction thus dissipation of energy at the interface between the constituents of polymer blend system is evaluated for this purpose from the very same free volume data. The parameter α represents the strength of hydrodynamic interaction or it is a measure of the adhesion strength at the interface. Present data based on hydrodynamic interaction parameter indicated that both e-beam and microwave irradiation can be used to stabilize the interfaces in binary polymer blends but the better interface modifier on the two blend systems studied. But which route that is e-beam or microwave depends on the presence of non-polar/polar groups respectively. © 2009 Wiley-VCH Verlag GmbH & Co. KGaA.


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Cite this Research Publication

J. Ma Raj, Kumaraswamy, G. Nb, and Ranganathaiah, Ca, “Interfacial stabilization of binary polymer blends through radiation treatment: A free volume approach”, Physica Status Solidi (C) Current Topics in Solid State Physics, vol. 6, pp. 2404-2406, 2009.