Experimental study of influence factors on compression stress relaxation of ACM

• Autorzy: Santos dos D J , Tavares L B , Batalha G. F.
• Języki publikacji: EN

Abstrakty

EN

Purpose: Purpose: of this paper is to investigate the influence of electron beam (EB) radiation, temperature and deformation on the compression stress relaxation behavior of UV curing polyacrylate rubber (ACM). Design/methodology/approach: ACM plugs were obtained by UV radiation curing. Some samples were post cured by EB dose of 250 kGy, providing two material conditions. The plugs were submitted to compression stress relaxation experiments (CSR) for 5.000 min on two temperature levels, 23°C and 90°C, and deformation levels of 10% and 15%. Results were analyzed using 2k Factorial Design, quantifying the influence of these factors on the maintained compression force. Findings: The results have shown an increase in the maintained compression force, respectively a decrease in the compression stress relaxation, for all EB irradiated ACM specimens along the entire measured period of time. The increase of the three analyzed factors has caused an increase of the maintained compression force. Through the 2k Factorial Design was possible to find out the deformation as the most relevant influence factor, followed by irradiation, as second influence factor and temperature. Research limitations/implications: ACM molecular structures were not physical-chemically investigated. Therefore, possible molecular structural changes, caused by EB radiation, were not described. Practical implications: Decreasing of compression stress relaxation implicates on increasing working life of sealing components made from the studied material, besides the improvement of sealing capacity of these components, even under reduced deformation conditions. Originality/value: The use of EB radiation as successful method to decrease compression stress relaxation of UV curing ACM rubber, has opened opportunities to industrial applications. Thus, provide knowledge about influence factors on ACM relaxation behavior.

Słowa kluczowe

EN

engineering polymers; mechanical; compression stress relaxation

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2011
• Tom: Vol. 46, nr 1
• Strony: 33--39
• Opis fizyczny: Bibliogr. 15 poz., rys., tab.

Twórcy

autor

Santos dos D J

• Department of Mechatronics and Mechanical Engineering, University of São Paulo - Escola Politecnica, Av. Prof. Mello Moraes, 2231, São Paulo, 05508-970, Brazil

autor

Tavares L B

• Department of Mechatronics and Mechanical Engineering, University of São Paulo - Escola Politecnica, Av. Prof. Mello Moraes, 2231, São Paulo, 05508-970, Brazil

autor

Batalha G. F.

• Department of Mechatronics and Mechanical Engineering, University of São Paulo - Escola Politecnica, Av. Prof. Mello Moraes, 2231, São Paulo, 05508-970, Brazil

Bibliografia

• [1] M. Patel, M. Soames, A.R. Skinner, T.S. Stephens, Stress relaxation and thermogravimetric studies on room temperature vulcanized polysiloxane rubbers, Polymer Degradation and Stability 83 (2004) 111-116.
• [2] A. Mostafa, A. Abuel-Kasem, M.R. Bayoumi, M.G. Sebaie, On the influence of CB loading on the creep and relaxation behaviour of SBR and NBR rubber vulcanizates, Material and Design 30 (2009) 2721-2725.
• [3] L.H. Sperling, Introduction to physical polymer science, John Wiley & Sons Inc., New Jersey, 2006.
• [4] R.P. Brown, F.N.B. Bennett, Compression stress relaxation, Polymer Testting 2 (1981) 125-133.
• [5] D. Manas, M. Manas, M. Stanek, M. Danek, Improvement of plastic properties, Archives of Materials Science and Engineering 32 (2008) 69-76.
• [6] I Banik, A.K. Bhowmick, Effect of electron beam irradiation on the properties of crosslinked rubbers, Radiation Physics and Chemistry 58 (2000) 293-298.
• [7] D. dos Santos, G.F. Batalha, Mechanical behaviour characterizing and simulation of polyacrylate rubber, Journal of Achievements in Materials and Manufacturing Engineering 38 (2010) 33-40.
• [8] D. dos Santos, Compression stress relaxation characterizing of irradiated acrylic rubber, PhD thesis, Sao Paulo University, 2010 (in Portuguese).
• [9] V. Placek, T. Kohout, V. Hnat, B. Bartonicek, Assesment of seal lifetime on nuclear power plants, Polymer Testing 28 (2009) 209-214.
• [10] V. Vijayabaskar, S. Bhattacharya, V.K. Tikku, A.K. Bhowmick, Electron beam initiated modification of acrylic elastomer in presence of polyfunctional monomers, Radiation Physics and Chemistry 71 (2004) 1045-1058.
• [11] L.R.G. Treloar, The physics of rubber elasticity, Third Edition, Oxford University Press, New York, 2009.
• [12] A. Gnatowski, J. Wawrzyniak, J. Jaruga, Performance properties and structure of electrochemically aged polypropylene with a dye addition, Archives of Materials Science and Engineering 40/1 (2010) 37-44.
• [13] K.P. Fernando, A.W. Birley, C. Hepburn, A new concept for stress relaxation measurements of rubbers in compression, Polymer Testing 3 (1983) 209-229.
• [14] R.S. Rivlin, Large Elastic Deformation, In: Rheology: theory and applications, Academic Press, New York, 1956.
• [15] Z.P. Zagórsky, EB-Crosslinking of elastomers, how does it compare with radiation crosslinking of other polymers, Radiation Physics and Chemistry 71 (2004) 261-265.