An effective tool to characterize adhesion at the interface of binary polymer blends: a free volume study

Raj, J. M. and Altaweel, A. M. and Chandrashekara, M. N. and Ramya, P. and Ravikumar, H. B. and Ranganathaiah, C. (2011) An effective tool to characterize adhesion at the interface of binary polymer blends: a free volume study. JOURNAL OF POLYMER ENGINEERING, 31 (2-3, S). pp. 93-96.

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In this work, an effective method of characterizing the adhesion at the interface of partially miscible and immiscible binary polymer is used. Three polymer blends namely PS/PMMA, PP/NBR and PVC/SAN were irradiated with e-beam and microwaves, in order to bring about interfacial modification, and were characterized in terms of free volume measured by Positron Lifetime technique. 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 formation. However, the extent of interfacial modification brought in at different weight compositions is not forthcoming. Therefore, the hydrodynamic interaction parameter alpha, which accounts for friction at the interface between the dissimilar chains of the blend constituents, is evaluated from the very same free volume data. Since alpha represents the strength of hydrodynamic interaction, it could be taken as an indicator of the adhesion strength at the interface. Present results showed that both e-beam and microwave irradiations can be used to stabilize the interfaces in binary polymer blends as evidenced by hydrodynamic interaction.

Item Type: Article
Uncontrolled Keywords: free volume; hydrodynamic interaction; interfaces; irradiation; polymer blends
Subjects: D Physical Science > Physics
Divisions: Department of > Physics
Depositing User: lpa venkatesh user
Date Deposited: 25 Jul 2019 09:57
Last Modified: 15 Oct 2019 10:00

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