Proton and alpha particle induced changes in thermal and mechanical properties of Lexan polycarbonate

K. Hareesh; Pintu Sen; Ravishankar Bhat; R. Bhargavi; Geetha G. Nair; Sangappa; Ganesh Sanjeev

doi:10.1016/j.vacuum.2012.10.012

Proton and alpha particle induced changes in thermal and mechanical properties of Lexan polycarbonate

K. Hareesh, Pintu Sen, Ravishankar Bhat, R. Bhargavi, Geetha G. Nair, Sangappa, Ganesh Sanjeev^*

^*Corresponding author for this work

Department of Physics, Manipal Institute of Technology, Bengaluru

Research output: Contribution to journal › Article › peer-review

22 Citations (Scopus)

Abstract

The thermal and mechanical properties of Lexan polycarbonate (PC) irradiated by 15 MeV proton and 40 MeV alpha particles with different fluencies have been investigated. The thermal decomposition temperature, thermal activation energy of decomposition, tensile strength, fracture strain, Young's modulus and average molecular weight of PC decreased after irradiation. The infrared spectroscopic results showed breakage of the carbonate site in PC after irradiation. The average surface roughness value of PC increased and it showed pores formation after irradiation. These changes in thermal and mechanical parameters were due to chain scission of C–O bond in PC after irradiation which is confirmed from infrared spectroscopic results. It was also showed that 40 MeV alpha particles induce more changes in thermal and mechanical properties of PC when compared to that of 15 MeV proton.

Original language	English
Pages (from-to)	1-6
Number of pages	6
Journal	Vacuum
Volume	91
DOIs	https://doi.org/10.1016/j.vacuum.2012.10.012
Publication status	Published - 01-05-2013

All Science Journal Classification (ASJC) codes

Instrumentation
Condensed Matter Physics
Surfaces, Coatings and Films

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10.1016/j.vacuum.2012.10.012

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title = "Proton and alpha particle induced changes in thermal and mechanical properties of Lexan polycarbonate",

abstract = "The thermal and mechanical properties of Lexan polycarbonate (PC) irradiated by 15 MeV proton and 40 MeV alpha particles with different fluencies have been investigated. The thermal decomposition temperature, thermal activation energy of decomposition, tensile strength, fracture strain, Young's modulus and average molecular weight of PC decreased after irradiation. The infrared spectroscopic results showed breakage of the carbonate site in PC after irradiation. The average surface roughness value of PC increased and it showed pores formation after irradiation. These changes in thermal and mechanical parameters were due to chain scission of C–O bond in PC after irradiation which is confirmed from infrared spectroscopic results. It was also showed that 40 MeV alpha particles induce more changes in thermal and mechanical properties of PC when compared to that of 15 MeV proton.",

author = "K. Hareesh and Pintu Sen and Ravishankar Bhat and R. Bhargavi and Nair, {Geetha G.} and Sangappa and Ganesh Sanjeev",

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T1 - Proton and alpha particle induced changes in thermal and mechanical properties of Lexan polycarbonate

AU - Hareesh, K.

AU - Sen, Pintu

AU - Bhat, Ravishankar

AU - Bhargavi, R.

AU - Nair, Geetha G.

AU - Sangappa,

AU - Sanjeev, Ganesh

PY - 2013/5/1

Y1 - 2013/5/1

N2 - The thermal and mechanical properties of Lexan polycarbonate (PC) irradiated by 15 MeV proton and 40 MeV alpha particles with different fluencies have been investigated. The thermal decomposition temperature, thermal activation energy of decomposition, tensile strength, fracture strain, Young's modulus and average molecular weight of PC decreased after irradiation. The infrared spectroscopic results showed breakage of the carbonate site in PC after irradiation. The average surface roughness value of PC increased and it showed pores formation after irradiation. These changes in thermal and mechanical parameters were due to chain scission of C–O bond in PC after irradiation which is confirmed from infrared spectroscopic results. It was also showed that 40 MeV alpha particles induce more changes in thermal and mechanical properties of PC when compared to that of 15 MeV proton.

AB - The thermal and mechanical properties of Lexan polycarbonate (PC) irradiated by 15 MeV proton and 40 MeV alpha particles with different fluencies have been investigated. The thermal decomposition temperature, thermal activation energy of decomposition, tensile strength, fracture strain, Young's modulus and average molecular weight of PC decreased after irradiation. The infrared spectroscopic results showed breakage of the carbonate site in PC after irradiation. The average surface roughness value of PC increased and it showed pores formation after irradiation. These changes in thermal and mechanical parameters were due to chain scission of C–O bond in PC after irradiation which is confirmed from infrared spectroscopic results. It was also showed that 40 MeV alpha particles induce more changes in thermal and mechanical properties of PC when compared to that of 15 MeV proton.

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Proton and alpha particle induced changes in thermal and mechanical properties of Lexan polycarbonate

Abstract

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