Ionizing Radiation Effect of PBT Measured by Nano-Indentation Test

Abstract:

The paper presents an experimental study of the effect of beta radiation on nanomechanical properties of surface layer of PBT. Irradiation of polymers initiates cross-linking process in the structure especially in nanolayers. Applied radiation doses (66, 132 and 198 kGy) caused different nanomechanical changes which have a significant effect on the final properties of the tested PBT. Beta irradiation of the examined thermoplastic caused the growth of values of material parameters as nanoindentation hardness, nanoindentation modulus or deformation work. The improvement of nanomechanical properties was measured by the nanoindentation test.

• Periodical: Applied Mechanics and Materials (Volumes 752-753)
• Pages: 317-321
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.752-753.317
• Online since: April 2015
• Authors: Martin Ovsik*, David Manas, Miroslav Manas, Michal Stanek, Adam Skrobak, Petr Kratky
• Keywords: Cross-Linking, Depth Sensing Indentation, Lonizing Radiation, Nano- Hardness, Nanoindentation, PBT

References

[1] M. Ovsik, D. Manas, M. Manas, M. Stanek, M. Hribova, K. Kocman and D. Samek, Irradiated polypropylene studied by microhardness and waxs, Chem. listy. 106 (2012) 507-510.

DOI: 10.1016/j.tsf.2012.09.051

[2] G. Zamfirova, V. Gaydarov, T. Zaharescu and L.G. Silva, Microindentation study of Electron Beam Irradiated Polyamide Samples, Chem. Listy. 104 (2010) 283-286.

[3] D. Manas, M. Hribova, M. Manas, M. Ovsik and M. Stanek, The effect of beta irradiation on morphology and micro hardness of polypropylene thin layers, Thin Solid Films. 530 (2013) 49-52.

DOI: 10.1016/j.tsf.2012.09.051

[4] W.C. Oliver and G.M. Pharr, Measurement of hardness and elastic modulus by instrumented indentation: Advances in understanding and refinements to methodology, J. Mater. Res. 19, 1 (2004) 3-20.

DOI: 10.1557/jmr.2004.19.1.3

[5] M. Ovsik, D. Manas, M. Manas, M. Stanek, M. Bednarik and P. Kratky, Effect of Beta Irradiation on Microhardness of Polyamide 6, Key Eng. Mater. 586 (2014) 218-221.

DOI: 10.4028/www.scientific.net/kem.586.218

[6] A. Bolshakov and G. M. Pharr, Influences of pileup on the measurement of mechanical properties by load and depth sensing indentation techniques, J. Mater. Res. 13, 4 (1998) 1049-1058.

DOI: 10.1557/jmr.1998.0146

[7] W.D. Nix and H. Gao, Indentation size effects in crystalline materials: A law for strain gradient plasticity, J. Mech. Phys. Solids. 46 (1998) 411-425.

DOI: 10.1016/s0022-5096(97)00086-0

[8] M. Ovsik, P. Kratky, D. Manas, M. Manas, M. Stanek and M. Bednarik, Micro-Hardness and Morphology of LDPE Influenced by Beta Radiation, Key Eng. Mater. 606 (2014) 253-256.

DOI: 10.4028/www.scientific.net/kem.606.253