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Study of visible luminescence performance in highly transparent PMMA/PVP polyblends

RITA SHARMA1, PRAVEEN KUMAR2,* , M. MIAN1, R. THANGARAJ1

Affiliation

  1. Semiconductors Laboratory, Department of Physics, GND University, Amritsar-143005, India
  2. Nanotechnology Research Centre, DAV Institute Engineering and Technology, Kabir Nagar, Jalandhar-144008, India

Abstract

This work reports the structure and optical spectroscopic study of solution cast PMMA/PVP polyblends by using x-ray diffraction, optical and florescence techniques. The first diffraction halos, characteristic of the amorphous state shift towards smaller diffraction angles while the other two of the PMMA polymer starts disappearing upon blending with PVP. The optical gap is found to decreases with an increase in Urbach’s energy indicating the rise in disorder upon blending. The broad luminescence band in the visible region at 350-550 nm using 300 nm excitation wavelength has been deconvoluted to two/three bands, with a red shift in their position with PVP content. The structure-property relationship with improved luminescence in visible region has been elaborated for designing efficient optical devices using PMMA/PVP polyblends..

Keywords

Polymer blending; membranes, XRD, Optical and luminescence properties.

Citation

RITA SHARMA, PRAVEEN KUMAR, M. MIAN, R. THANGARAJ, Study of visible luminescence performance in highly transparent PMMA/PVP polyblends, Optoelectronics and Advanced Materials - Rapid Communications, 6, 5-6, May-June 2012, pp.539-542 (2012).

Submitted at: Feb. 20, 2012

Accepted at: June 6, 2012