Electron beam induced modifications in flexible biaxially oriented polyethylene terephthalate sheets: Improved mechanical and electrical properties

In the present work, we have studied the effects of electron beam irradiation (with dose ranging from 2 to 32 kGy) on mechanical and electrical properties of biaxially oriented polyethylene terephthalate (BOPET) sheets. The sol-gel analysis, Fourier transformation infra-red (FTIR), X-ray photoelectr...

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Bibliographic Details
Published in:Materials chemistry and physics 2017-03, Vol.189, p.237-244
Main Authors: Chaudhary, N., Koiry, S.P., Singh, A., Tillu, A.R., Jha, P., Samanta, S., Debnath, A.K., Aswal, D.K., Mondal, R.K., Acharya, S., Mittal, K.C.
Format: Article
Language:English
Subjects:
Crosslinking
E-beam irradiation
Electric properties
Electrical properties
Electrical resistivity
Electron beams
Electron irradiation
Flexible polymer
Food packaging
Fourier transforms
FTIR
Mechanical properties
Medical electronics
Medical materials
Modulus of elasticity
Polyethylene terephthalate
Radiation
RF linac
Sheets
Sol-gel analysis
Sol-gel processes
Sterilization
Tensile strength
X ray photoelectron spectroscopy
XPS
Young's modulus
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Summary:In the present work, we have studied the effects of electron beam irradiation (with dose ranging from 2 to 32 kGy) on mechanical and electrical properties of biaxially oriented polyethylene terephthalate (BOPET) sheets. The sol-gel analysis, Fourier transformation infra-red (FTIR), X-ray photoelectron spectroscopy (XPS) characterizations of the irradiated BOPET sheets suggest partial cross-linking of PET chains through the diethylene glycol (DEG). The mechanical properties of BOPET, such as, tensile strength, Young's modulus and electrical resistivity shows improvement with increasing dose and saturate for doses >10 kGy. The improved mechanical properties and high electrical resistivity of electron beam modified BOPET sheets may have additional advantages in applications, such as, packaging materials for food irradiation, medical product sterilization and electronic industries. Irradiation of BOPET by electron beam leads to the formation of diethylene glycol that crosslink's the PET chains, resulting in improved mechanical properties and enhanced electrical resistivity. [Display omitted] •BOPET exhibit improved tensile strength/Young's modulus after e-beam exposure.•Electrical resistivity of BOPET increases after e-beam exposure.•Cross-linking of PET chains through diethylene glycol was observed after e-beam exposure.
ISSN:0254-0584
1879-3312
DOI:10.1016/j.matchemphys.2016.12.054