A mechanism of surface hardness enhancement for H+ irradiated polycarbonate.

Sunmog Yeo,Won-Je Cho,Jun Mok Ha,Dong-Seok Kim,Chan Young Lee,Jae Kwon Suk,Chorong Kim,Yong Seok Hwang

doi:10.1039/d0ra05073c

Sunmog Yeo, Won-Je Cho + Show 6 more

Open Access

https://doi.org/10.1039/d0ra05073c

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Abstract

H+ irradiation increases the surface hardness of polycarbonate. Nano indentation measurement shows that the hardness increases up to 3.7 GPa at the dose of 5 × 1016 # cm−2 and at the irradiation energy of 150 keV. In addition, the hardness increases with the dose and the energy of H+ irradiation. In accordance with the nano indentation measurement, the Fourier-transform infrared spectroscopy (FTIR) depends on the dose and energy of H+ irradiation. The peak at ∼1500 cm−1 for the aromatic ring and the peak at ∼1770 cm−1 for the C Created by potrace 1.16, written by Peter Selinger 2001-2019 ]]> O stretch decrease with increasing dose and energy, while the increase of the dose and energy develops a new CO stretch vibration at ∼1700 cm−1 and forms aromatic hydrocarbons at ∼1600 cm−1. X-ray diffraction experiments are also consistent with the nano indentation measurement and FTIR spectra. Based on the experiments, we discuss a possible mechanism of the surface hardness enhancements by ion beam irradiation.

Highlights

Polymers are of great research interest due to their versatile applications in areas such as vehicle light-weighting, fabrication of 3D micro patterned surfaces, optical sensors, and integrated optics for communications.[1,2,3] Surface modi cation is an important aspect in polymer application and modi cation creates additional polymer properties
The surface hardness and Fourier-transform infrared spectroscopy (FTIR) spectra for ion beam irradiated PC are examined with increasing dose and irradiation energy
The nanoindentation test reveals that the surface hardness increases with increasing H+ irradiation dose and energy

Summary

Introduction

Polymers are of great research interest due to their versatile applications in areas such as vehicle light-weighting, fabrication of 3D micro patterned surfaces, optical sensors, and integrated optics for communications.[1,2,3] Surface modi cation is an important aspect in polymer application and modi cation creates additional polymer properties. Nano indentation measurement shows that the hardness increases up to 3.7 GPa at the dose of 5 Â 1016 # cmÀ2 and at the irradiation energy of 150 keV. The hardness increases with the dose and the energy of H+ irradiation.

Results

Conclusion