Study by FT-IR Technique and Adhesive Properties of Vulcanized EPDM Modified with Plasma

Santos, Renata Patrícia dos; Oliveira Junior, Mauro Santos de; Mattos, Elizabeth da Costa; Diniz, Milton Faria; Dutra, Rita de Cássia Lazzarini

doi:10.5028/jatm.v5i1.162

ABSTRACT:

The surface of vulcanized ethylene propylene diene terpolymers (EPDM) was modified by Ar and N2, microwave generated plasma in order to improve adhesion properties. Surface modification was characterized by universal attenuated total reflectance Fourier Transform Infrared (UATR/FT-IR), because it presented lower interference of ingredients of EPDM formulation when compared with other techniques used for the attenuated total reflectance (ATR) to different crystals (ATR/KRS-5 and ATR/Ge). Oxygenated groups were introduced on the surface after treatments which were formed when the activated surface was exposed to the plasma gas. In treatments with nitrogen, oxygen groups and probable nitrogen groups were formed on the surface and could be identified by FT-IR. Reduction in the measurement of the contact angle and an increase in the work of adhesion and in the peel strength (EPDM X Polyurethane (PU)) were observed after the treatment resulted in the improvement of the adhesion properties of the modified surface.

KEYWORDS:
EPDM; Plasma; Surface characterization; UATR/FT-IR

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REFERENCES

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Publication Dates

Publication in this collection
Jan-Mar 2013

History

Received
19 Sept 2012
Accepted
16 Jan 2013

This is an Open Access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

[1] Abibi, N. and Hequet, E., 2005, "Fourier Transform Infrared Analysis Of Trehalulose And Sticky Cotton Yarn Defects Using ZnSe-Diamond Universal Attenuated Total Reflectance", Text Res J, Vol. 75, No. 9, pp. 645-652.

[2] Awaja, F. et al., 2009, "Adhesion of polymers", Progress in Polymer Science, Vol. 34, pp. 948-968.

[3] Babbit, R.O., 1978, "The Vanderbilt Rubber Handbook", R.T. Company, Inc. Vanderbilt, Norwalk, 641p.

[4] Basak, G.C. et al., 2012, "Surface modification of argon/oxygen plasma treated vulcanized ethylene propylene diene polymethylene surfaces for improved adhesion with natural rubber", Applied Surface Science, APSUSC-20806, pp. 1-14.

[5] Basak, G.C. et al., 2010, "Characterization of EPDM Vulcanizates Modified with Gamma Irratiation and Trichloroisocyanuric Acid and Their Adhesion Behavior with Natural Rubber", The Journal of Adhesion, Vol. 86, No. 3, pp. 314-315.

[6] Chan, C.M. and Ko, T.M., 1996, "Polymer surface modification by plasmas and photons", Surface Science Reports, Vol. 24, No. 45.

[7] Costa, T.H.F. et al., 2008, "Caracterização de filmes de poliéster modificados por plasma de O₂ a baixa pressão", Revista Matéria, Vol. 13, pp. 66.

[8] Dutra, R.C.L. et al., 1995, "Importância da Preparação de Amostras em Espectroscopia no Infravermelho com Transformada de Fourier (FT-IR) na Investigação de Constituintes em Materiais e Compostos", Polímeros, Vol. 5, pp. 41-47.

[9] Fleming, R.R. et al., 2010, "Plasma treatment of polyacrylonitrile/vinyl acetate films obtained by the extrusion process", Polymer Bulletin, Vol. 66, pp. 282.

[10] Grythe, K.F. and Hansen, F.K., 2006.,"Surface Modification of EPDM Rubber by Plasma Treatment", Langmuir, Vol. 22, pp. 6109-6124.

[11] Hegemann, D. et al., 2003, "Plasma treatment of polymers for surface and adhesion improvement", Nuclear Instruments and Method in Physics Research B. Vol. 208, pp. 281-286.

[12] Moraes, J.H. et al., 2007a, "Surface improvement of EPDM rubber by plasma treatment", Journal Phys Appl. Phys, Vol. 40, pp. 7747-7748.

[13] Moraes, J.H. et al., 2007b, "Surface modification of EPDM in r. f. plasma: process optimization and surface characterization". Phys Stat Sol (a), Vol. 204, p. 957.

[14] Moraes, J.H. et al., 2007c, "Rapid surface modification of EPDM with oxygen and nitrogen plasmas: a comparative study", J Optoelectron Adv M, Vol. 9, pp. 475-477.

[15] PerkinElmer, "ATR accessories - An overview". Technical Note, FT-IR Spectroscopy.

[16] Peters, D., 1996, "Ultrasound in materials chemistry", J. Mater Chem. Vol. 6, No. 10, pp. 1605.

[17] Petrie, E.M., 2000, "Handbook of adhesives and sealants". McGraw-Hill, New York.

[18] Rapra Review Reports, 2002, "Adhesion and bonding to Polyolefins", pp.5.

[19] Sánchez, M.D.R. et al., 2001, "Surface modifications of a vulcanized rubber using corona discharge and ultraviolet radiation treatments", J Mater Sci, Vol. 36, pp. 5794.

[20] Silverstein, R.M. and Webster, F.X., 2000, "Identificação Espectrométrica de Compostos Orgânicos", 6^th Ed, LTC - Livros Técnicos e Científicos Editora, Rio de Janeiro, pp. 84.

[21] Smith, A.L., 1979, "Applied Infrared Spectroscopy", John Wiley & Sons, New York.

[22] Viadaurre, E.F.C. et al., 2002, "Surface Modification of Polymeric Materials by Plasma Treatment", Mater Res, Vol. 5, pp. 37.

[23] Waltham, 2005, "FT-IR Spectroscopy Attenuated Total Reflectance (ATR)", Technical Note. Catalogue PerkinElmer.

[24] Weon, J.I. and Choi, K.Y., 2009, "Surface characterization and Morphology in Ar-Plasma-Treated Polypropylene Blend", Macromol Res, Vol. 17, pp. 891.

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