Impact of electron-beam irradiation on free-volume related microstructural properties of PVA: NaBr polymer composites

Ismayil, Ravindrachary Vasachar, Rajashekhar F. Bhajantri, Praveena S. Dhola, Ganesh Sanjeev

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Sodium Bromide doped Poly(vinyl alcohol) (PVA:NaBr, 80:20) polymer composite films were prepared using a solution casting method. These films were subjected to 8 MeV electron beam radiation at a dose of up to 300 kGy in air at room temperature. The free volume related microstructural and electrical properties of these irradiated films were studied using various characterization methods, such as positron annihilation lifetime spectroscopy (PALS) and AC & DC conductivity measurement techniques. The variations in the positron lifetime data indicate that the free-volume related properties of the doped polymer are affected by irradiation. From the results, it is found that at lower doses, a cross-linking network provides hopping sites for Na+ ions, and at higher doses, the chain-scission process facilitates ionic transport through segmental motion. Thus, the free volume around the polymer chain leads to mobility of the ions as well as the polymer segments and hence contributes to the enhancement of conductivity.

Original languageEnglish
Pages (from-to)29-38
Number of pages10
JournalNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume342
DOIs
Publication statusPublished - 01-01-2015

Fingerprint

Free volume
Electron beams
Irradiation
electron beams
irradiation
composite materials
Composite materials
polymers
Polymers
dosage
Positron annihilation
Ions
Positrons
Composite films
sodium bromides
Polymer films
life (durability)
conductivity
Dosimetry
Casting

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Instrumentation

Cite this

@article{0a8abe08002c48c192908e0e6da5c658,
title = "Impact of electron-beam irradiation on free-volume related microstructural properties of PVA: NaBr polymer composites",
abstract = "Sodium Bromide doped Poly(vinyl alcohol) (PVA:NaBr, 80:20) polymer composite films were prepared using a solution casting method. These films were subjected to 8 MeV electron beam radiation at a dose of up to 300 kGy in air at room temperature. The free volume related microstructural and electrical properties of these irradiated films were studied using various characterization methods, such as positron annihilation lifetime spectroscopy (PALS) and AC & DC conductivity measurement techniques. The variations in the positron lifetime data indicate that the free-volume related properties of the doped polymer are affected by irradiation. From the results, it is found that at lower doses, a cross-linking network provides hopping sites for Na+ ions, and at higher doses, the chain-scission process facilitates ionic transport through segmental motion. Thus, the free volume around the polymer chain leads to mobility of the ions as well as the polymer segments and hence contributes to the enhancement of conductivity.",
author = "Ismayil and Ravindrachary Vasachar and Bhajantri, {Rajashekhar F.} and Dhola, {Praveena S.} and Ganesh Sanjeev",
year = "2015",
month = "1",
day = "1",
doi = "10.1016/j.nimb.2014.09.021",
language = "English",
volume = "342",
pages = "29--38",
journal = "Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms",
issn = "0168-583X",
publisher = "Elsevier",

}

Impact of electron-beam irradiation on free-volume related microstructural properties of PVA : NaBr polymer composites. / Ismayil; Vasachar, Ravindrachary; Bhajantri, Rajashekhar F.; Dhola, Praveena S.; Sanjeev, Ganesh.

In: Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, Vol. 342, 01.01.2015, p. 29-38.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Impact of electron-beam irradiation on free-volume related microstructural properties of PVA

T2 - NaBr polymer composites

AU - Ismayil,

AU - Vasachar, Ravindrachary

AU - Bhajantri, Rajashekhar F.

AU - Dhola, Praveena S.

AU - Sanjeev, Ganesh

PY - 2015/1/1

Y1 - 2015/1/1

N2 - Sodium Bromide doped Poly(vinyl alcohol) (PVA:NaBr, 80:20) polymer composite films were prepared using a solution casting method. These films were subjected to 8 MeV electron beam radiation at a dose of up to 300 kGy in air at room temperature. The free volume related microstructural and electrical properties of these irradiated films were studied using various characterization methods, such as positron annihilation lifetime spectroscopy (PALS) and AC & DC conductivity measurement techniques. The variations in the positron lifetime data indicate that the free-volume related properties of the doped polymer are affected by irradiation. From the results, it is found that at lower doses, a cross-linking network provides hopping sites for Na+ ions, and at higher doses, the chain-scission process facilitates ionic transport through segmental motion. Thus, the free volume around the polymer chain leads to mobility of the ions as well as the polymer segments and hence contributes to the enhancement of conductivity.

AB - Sodium Bromide doped Poly(vinyl alcohol) (PVA:NaBr, 80:20) polymer composite films were prepared using a solution casting method. These films were subjected to 8 MeV electron beam radiation at a dose of up to 300 kGy in air at room temperature. The free volume related microstructural and electrical properties of these irradiated films were studied using various characterization methods, such as positron annihilation lifetime spectroscopy (PALS) and AC & DC conductivity measurement techniques. The variations in the positron lifetime data indicate that the free-volume related properties of the doped polymer are affected by irradiation. From the results, it is found that at lower doses, a cross-linking network provides hopping sites for Na+ ions, and at higher doses, the chain-scission process facilitates ionic transport through segmental motion. Thus, the free volume around the polymer chain leads to mobility of the ions as well as the polymer segments and hence contributes to the enhancement of conductivity.

UR - http://www.scopus.com/inward/record.url?scp=85002252429&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85002252429&partnerID=8YFLogxK

U2 - 10.1016/j.nimb.2014.09.021

DO - 10.1016/j.nimb.2014.09.021

M3 - Article

AN - SCOPUS:85002252429

VL - 342

SP - 29

EP - 38

JO - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms

JF - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms

SN - 0168-583X

ER -