Effect of electron beam irradiation on the microstructure, optical and electrical properties of glass resistive plate chamber detector material

Aneeshkumar, K. V.; Krishnaveni, S.; Ranganathaiah, C.; Ravikumar, H. B.

doi:10.1007/s00339-017-1142-8

Cited by 4 publications

(3 citation statements)

References 36 publications

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“…Each of these annihilation processes has a characteristic lifetime. Since positronium is trapped and annihilated in free volume sites in polymers, the o‐Ps lifetime is treated as an important parameter for the determination of free volume hole size in the polymer matrix .…”

Section: Methodsmentioning

confidence: 99%

“…Positron annihilation lifetime spectra of PSAN and TiO 2 nanoparticle incorporated polystyrene co‐acrylonitrile (PSAN/TiO 2 ) nanocomposites for different filler concentration were recorded using a standard fast–fast coincidence system with conically shaped BaF 2 scintillators coupled to photomultiplier tubes of type XP2020/Q with quartz window as detectors . The two identical pieces of the samples were placed on either sides of a 15 µCi‐ 22 Na positron source, deposited on a pure Kapton foil of 0.0127 mm thickness.…”

Section: Methodsmentioning

confidence: 99%

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Effect of TiO₂ nano‐filler on the electrical conductivity and free volume parameters of PSAN/TiO₂ nanocomposites

Ningaraju

Ravikumar

2016

Polymer Composites

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To explore the effect of filler on the electrical conductivity of polymer nanocomposites, polystyrene coacrylonitrile and TiO 2 (PSAN/TiO 2 ) nanocomposites of different TiO 2 wt% have been prepared. The microstructural characterization has been performed by positron annihilation lifetime spectroscopy (PALS). Positron lifetime parameters viz. o-Ps lifetime (s 3 ) and free volume size (V f ) decreases up to 0.6 wt% suggests the filling of the cavities by Ti 31 and O 2 ions as well as complex formation. The increased free volume size (V f ) after 0.6 wt% of TiO 2 was attributed to the o-Ps annihilation at the interface of PSAN and TiO 2 nanoclusters. The variation of electrical conductivity at lower and higher concentration of TiO 2 is attributed to the blocking effect and space charge effect, respectively. The electrical conductivity decreases along with the free volume sizes at lower concentration of TiO 2 due to the hindrance of the ions mobility. The increased conductivity with the increased free volume sizes indicates the formation of more void space at the interface due to the formation of TiO 2 nanoclusters. The surface morphology of the nanocomposites studied by scanning electron microscopy (SEM) shows uniform dispersion at the lower wt% of TiO 2 and increased size of nanocluster formation at the higher concentration of TiO 2 nanoparticles in PSAN matrix. The crystallinity evaluated by X-ray diffraction (XRD) results also indicates the formation of TiO 2 nanoclusters between 0.6 and 1.0 wt% of TiO 2 . Fourier transform infrared spectroscopy (FTIR) suggests the improved chemical and physical interaction between the functional groups of TiO 2 and polymer side chain. POLYM. COMPOS., 00:000-000,

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Effect of TiO₂ nano‐filler on the electrical conductivity and free volume parameters of PSAN/TiO₂ nanocomposites

Ningaraju

Ravikumar

2016

Polymer Composites

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“…In recent years, positron lifetime technique has emerged as a unique and potent probe for directly characterizing the free volume cavities and their concentration in the amorphous region of the polymers in terms of positron lifetime of the injected positrons [12]. Free volume holes provide pathways for thermal motion of the chain segments.…”

Section: Introductionmentioning

confidence: 99%

Whole-Pattern Fitting and Positron Annihilation Studies of Magnetic PVA/α-Fe2O3 Nanocomposites

Prashanth¹,

Mahesh²,

Prakash

et al. 2016

Braz J Phys

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Studies on thermally induced microstructural modifications and electrical conductivity in glass RPC detector materials

Kumar

Ravikumar

2020

Journal of Non-Crystalline Solids

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Effect of electron beam irradiation on the microstructure, optical and electrical properties of glass resistive plate chamber detector material

Cited by 4 publications

References 36 publications

Effect of TiO₂ nano‐filler on the electrical conductivity and free volume parameters of PSAN/TiO₂ nanocomposites

Effect of TiO₂ nano‐filler on the electrical conductivity and free volume parameters of PSAN/TiO₂ nanocomposites

Whole-Pattern Fitting and Positron Annihilation Studies of Magnetic PVA/α-Fe2O3 Nanocomposites

Studies on thermally induced microstructural modifications and electrical conductivity in glass RPC detector materials

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Effect of electron beam irradiation on the microstructure, optical and electrical properties of glass resistive plate chamber detector material

Cited by 4 publications

References 36 publications

Effect of TiO2 nano‐filler on the electrical conductivity and free volume parameters of PSAN/TiO2 nanocomposites

Effect of TiO2 nano‐filler on the electrical conductivity and free volume parameters of PSAN/TiO2 nanocomposites

Whole-Pattern Fitting and Positron Annihilation Studies of Magnetic PVA/α-Fe2O3 Nanocomposites

Studies on thermally induced microstructural modifications and electrical conductivity in glass RPC detector materials

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Product

Resources

About

Effect of TiO₂ nano‐filler on the electrical conductivity and free volume parameters of PSAN/TiO₂ nanocomposites

Effect of TiO₂ nano‐filler on the electrical conductivity and free volume parameters of PSAN/TiO₂ nanocomposites