Raj, J. M. and Ranganathaiah, C. (2009) A free-volume study on the phase modifications brought out by e-beam and microwave irradiations in PP/NBR and PVC/SAN blends. Polymer Degradation and Stability, 94 (3). pp. 397-403. ISSN 1873-2321
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Partially miscible blends of PP/NBR and PVC/SAN with different compositions have been prepared by solvent casting and characterized by positron annihilation lifetime and differential scanning calorimetry. Phase modification in these systems has been brought about using e-beam and microwave irradiations. These changes have been studied through free-volume monitoring. The changes in free-volume parameters on e-beam and microwave irradiations on the two systems clearly show improved interaction between the blend constituents as a result of cross-linking through hydrogen bond formation. However, the free-volume data do not indicate whether the improvement in miscibility is due to changes at the interface or in the constituents of the blend. We have extended free-volume data to evaluate the hydrodynamic interaction parameter alpha, which is the measure of excess friction at the interface of the blend. Hydrodynamic interaction parameter shows that e-beam is a better interface stabilizer if the blends contain no polar group/groups and microwave irradiation is a better route to stabilize the interface in the case where the blend contains a polar group. (C) 2008 Elsevier Ltd. All rights reserved.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | o-Ps lifetime; Hydrodynamic interaction; Polymer blends; Interface; e-beam; Microwave irradiation |
| Subjects: | D Physical Science > Physics |
| Divisions: | Department of > Physics |
| Depositing User: | Users 19 not found. |
| Date Deposited: | 28 Aug 2019 07:35 |
| Last Modified: | 28 Aug 2019 07:35 |
| URI: | http://eprints.uni-mysore.ac.in/id/eprint/7229 |
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