A new method of stabilization and characterization of the interface in binary polymer blends by irradiation: A positron annihilation study

2009 ◽  
Vol 47 (6) ◽  
pp. 619-632 ◽  
Author(s):  
J. M. Raj ◽  
C. Ranganathaiah
Keyword(s):  
Polymer Blends ◽  
Positron Annihilation ◽  
New Method ◽  
Binary Polymer ◽  
Positron Annihilation Study

Characterization of Oxygen Vacancy Associates within Hydrogenated TiO2: A Positron Annihilation Study

2012 ◽  
Vol 116 (42) ◽  
pp. 22619-22624 ◽  
Author(s):  
Xudong Jiang ◽  
Yupeng Zhang ◽  
Jing Jiang ◽  
Yongsen Rong ◽  
Yancheng Wang ◽  
...  
Keyword(s):  
Oxygen Vacancy ◽  
Positron Annihilation ◽  
Positron Annihilation Study

Characterization of interfacial adhesion in binary polymer blends: a new approach based on positron lifetime study

2011 ◽  
Vol 31 (2-3) ◽  
Author(s):  
Chikkakuntappa Ranganathaiah
Keyword(s):  
Polymer Blends ◽  
Free Volume ◽  
Hydrodynamic Interaction ◽  
Positron Lifetime ◽  
Volume Data ◽  
New Approach ◽  
Polar Groups ◽  
Binary Polymer ◽  
Partially Miscible

Abstract A new method of characterizing the adhesion at the interface of partially miscible and immiscible binary polymer blends based on free volume concept is described here. The efficacy of the method is tested in four binary polymer blend systems namely PS/PMMA, PVC/EVA, PP/NBR and PVC/SAN. The usefulness of hydrodynamic interaction is exploited which is derived from free volume data to understand the changes at the interface. We understand that if the adhesion at the interface is good it exhibits large negative values for hydrodynamic interaction parameter α, a measure of excess friction at the interface. The thermal properties (indicated by Tg) also improve for this condition. To show that the method is sensitive to the changes at the interface, we modified the interface through microwave and e-beam irradiation and found from α characterization, that blends with polar groups exhibit interface stabilization for microwave irradiation while e-beam is good for blends with no polar or weak polar groups.

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