Optical and microstructural studies on electron irradiated PMMA

A positron annihilation study

Ismayil, V. Ravindrachary, R. F. Bhajantri, S. D. Praveena, Boja Poojary, Dhanadeep Dutta, P. K. Pujari

Research output: Contribution to journalArticle

40 Citations (Scopus)

Abstract

The effect of electron irradiation on the free volume related microstructural and optical properties of Poly(methyl methacrylate) have been studied using Positron Annihilation and other techniques. The FTIR spectral study on the irradiated films suggests the existence of C{double bond, long}C group and is understood by invoking the carbonaceous clusters as a consequence of chain scission in PMMA. Using UV-Visible absorption spectra the optical parameters like optical energy bandgap and activation energy were determined and the variation of these parameters suggests the existence of defects within the irradiated sample. Following Robertson's theory, the carbonaceous cluster size is estimated and it increases with increase in electron dose. The XRD study indicates the enhancement of amorphous nature of the film due to chain scission by irradiation. The Positron annihilation result shows that electron irradiation affects the free volume related microstructure and the carbonaceous clusters may act as positron scattering centers.

Original languageEnglish
Pages (from-to)1083-1091
Number of pages9
JournalPolymer Degradation and Stability
Volume95
Issue number6
DOIs
Publication statusPublished - 01-06-2010

Fingerprint

Positron annihilation
Electron irradiation
Free volume
Polymethyl Methacrylate
positron annihilation
electron irradiation
Electrons
cleavage
Positrons
Polymethyl methacrylates
Absorption spectra
Energy gap
electrons
Optical properties
Activation energy
Irradiation
Scattering
visible spectrum
polymethyl methacrylate
Defects

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Polymers and Plastics
  • Materials Chemistry

Cite this

Ismayil, Ravindrachary, V., Bhajantri, R. F., Praveena, S. D., Poojary, B., Dutta, D., & Pujari, P. K. (2010). Optical and microstructural studies on electron irradiated PMMA: A positron annihilation study. Polymer Degradation and Stability, 95(6), 1083-1091. https://doi.org/10.1016/j.polymdegradstab.2010.02.031
Ismayil ; Ravindrachary, V. ; Bhajantri, R. F. ; Praveena, S. D. ; Poojary, Boja ; Dutta, Dhanadeep ; Pujari, P. K. / Optical and microstructural studies on electron irradiated PMMA : A positron annihilation study. In: Polymer Degradation and Stability. 2010 ; Vol. 95, No. 6. pp. 1083-1091.
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Ismayil, Ravindrachary, V, Bhajantri, RF, Praveena, SD, Poojary, B, Dutta, D & Pujari, PK 2010, 'Optical and microstructural studies on electron irradiated PMMA: A positron annihilation study', Polymer Degradation and Stability, vol. 95, no. 6, pp. 1083-1091. https://doi.org/10.1016/j.polymdegradstab.2010.02.031

Optical and microstructural studies on electron irradiated PMMA : A positron annihilation study. / Ismayil; Ravindrachary, V.; Bhajantri, R. F.; Praveena, S. D.; Poojary, Boja; Dutta, Dhanadeep; Pujari, P. K.

In: Polymer Degradation and Stability, Vol. 95, No. 6, 01.06.2010, p. 1083-1091.

Research output: Contribution to journalArticle

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AU - Pujari, P. K.

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