Discoloration mechanism of UV-curable polymer/metal hybrid coating

Mun Ho Kim; Jong-Bae Lee; Kil-Yeong Choi

Journal of Industrial and Engineering Chemistry, Vol.19, No.1, 292-298, January, 2013

DOI10.1016/j.jiec.2012.08.014 Export Citation

Discoloration mechanism of UV-curable polymer/metal hybrid coating

Mun Ho Kim, Jong-Bae Lee, and Kil-Yeong Choi^†

Reliability Assessment Center for Chemical Materials, Korea Research Institute of Chemical Technology (KRICT), 141 Gajeong-ro, Yuseong-gu, Daejeon 305-600, Republic of Korea

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The purpose of this study is to conduct an in-depth analysis of the discoloration mechanism of UVcurable polymer/metal hybrid coating. A variety of technical approaches, including microscopic, spectroscopic, and chromatographic analysis techniques, were used to investigate the nature of discoloration and the root cause. The hybrid coating has a typical multilayered structure consisting of a base coat, a vacuum deposited metal layer, and a top coat. The results obtained by microscopic and spectroscopic analyses demonstrated that the discoloration of the hybrid coating stemmed from yellowing of the top coat. Deterioration or degradation of the metal component in the vacuum deposited metal layer was not confirmed. The results of an analysis of additives in the discolored top coat showed that there is a small quantity of unreacted photoinitiators remaining in the top coat. From the results of solvent extraction and gel content measurement, it is believed that an excessive amount of photoinitiators was used in the resin of the top coat and one of the residual unreacted photoinitiators caused yellowing of the top coat.

Keywords:Failure analysis;UV-curable polymer;PVD;Discoloration;Photoinitiator

[References]

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Bao Y, Gao J, Gawne DT, Surface and Coatings Technology., 205, 15 (2010)
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Moon JI, Lee YH, Kim HJ, Schwartz S, Rafilovich M, Polymer Testing., 31, 433 (2012)
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Sepeur S, Kunze N, Werner B, Schmidt H, Thin Solid Films, 351(1-2), 216 (1999)
Wenning A, Macromolecular Symposium., 187, 597 (2002)
Moon JH, Han HS, Shul YG, Jang DH, Ro MD, Yun DS, Progress in Organic Coatings., 59, 106 (2007)
Seo TW, Weon JI, J. Mater. Sci., 47(5), 2234 (2012)
Asensio RC, Moya MSA, de la Roja JM, Gomez M, Analytical and Bioanalytical Chemistry., 395, 2081 (2009)
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Koo JB, Park CH, Han C, Na YC, Bulletin of the Korean Chemical Society., 30, 368 (2009)
Lee BH, Choi JH, Kim HJ, JournalofCoatingsTechnologyand Research., 3, 221 (2006)
Joo HS, Park YJ, Do HS, Kim HJ, Song SY, Choi KY, J. Adhes. Sci. Technol., 21(7), 575 (2007)
Jang SC, Yi SC, Hong JW, Synthesis Journal of Industrial and Engineering Chemistry., 11, 964 (2005)
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Cho JD, Han ST, Hong JW, Polymer Testing., 26, 71 (2007)
Segurola J, Allen NS, Edge M, McMahon A, Wilson S, Polymer Degradation and Stability., 64, 39 (1999)
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[Referenced By]

[Related Articles]

[1] Chen CH, Wang JJ, Yen FS, Composites Part B Engineering., 43, 569 (2012)

[2] Marano C, Britico-Wangosa F, Marini M, Pilati F, Toselli M, European Polymer Journal., 45, 870 (2009)

[3] Bao Y, Gao J, Gawne DT, Surface and Coatings Technology., 205, 15 (2010)

[4] Parent D, Sputtered metal coatings and UV coatings, Radtech Report Magazine, November/December 2008, Radtech International. http://www.radtech.org (accessed 09.01.12).

[5] Bauer F, Flyunt R, Czihal K, Buchmeiser MR, Langguth H, Mehnert R, Macromolecular Materials and Engineering., 291, 493 (2006)

[6] Moon JI, Lee YH, Kim HJ, Schwartz S, Rafilovich M, Polymer Testing., 31, 433 (2012)

[7] Cho JD, Kim HK, Kim YS, Hong JW, Polymer Testing., 22, 633 (2003)

[8] Sepeur S, Kunze N, Werner B, Schmidt H, Thin Solid Films, 351(1-2), 216 (1999)

[9] Wenning A, Macromolecular Symposium., 187, 597 (2002)

[10] Moon JH, Han HS, Shul YG, Jang DH, Ro MD, Yun DS, Progress in Organic Coatings., 59, 106 (2007)

[11] Seo TW, Weon JI, J. Mater. Sci., 47(5), 2234 (2012)

[12] Asensio RC, Moya MSA, de la Roja JM, Gomez M, Analytical and Bioanalytical Chemistry., 395, 2081 (2009)

[13] Alavi MHS, Habibi M, Amrollahi R, Taromi FA, Journal of Fusion Energy., 30, 184 (2011)

[14] Wu L, Yu H, Yan J, You B, Polymer International., 50, 1288 (2001)

[15] Zhong H, Wei P, Jiang P, Wang G, Fire and Materials., 31, 411 (2007)

[16] Scheirs J, Compositional and Failure Analysis of Polymers, John Wiley and Sons, Ltd., London, 692 (2000)

[17] Wampler T, LabPlus International September 2004, pp. 6.9. http://www.labintonline.com.

[18] Jansson KD, Zawodny CP, Wampler TP, Journal of Analytical and Applied Pyrolysis., 79, 353 (2007)

[19] Bart JCJ, Polymer Testing., 20, 729 (2001)

[20] Hanton SD, Chem. Rev., 101(2), 527 (2001)

[21] Koo JB, Park CH, Han C, Na YC, Bulletin of the Korean Chemical Society., 30, 368 (2009)

[22] Lee BH, Choi JH, Kim HJ, JournalofCoatingsTechnologyand Research., 3, 221 (2006)

[23] Joo HS, Park YJ, Do HS, Kim HJ, Song SY, Choi KY, J. Adhes. Sci. Technol., 21(7), 575 (2007)

[24] Jang SC, Yi SC, Hong JW, Synthesis Journal of Industrial and Engineering Chemistry., 11, 964 (2005)

[25] Segurola J, Allen NS, Edge M, Parrondo A, Roberts R, Journal of Coatings Technology., 71, 61 (1999)

[26] Cho JD, Han ST, Hong JW, Polymer Testing., 26, 71 (2007)

[27] Segurola J, Allen NS, Edge M, McMahon A, Wilson S, Polymer Degradation and Stability., 64, 39 (1999)

[28] Vazquez CP, Joly-Duhamel C, Boutevin B, Macromolecular Chemistry and Physics., 210, 269 (2009)

[29] Zhu P, Kavanagh MA, Anderson KS, Krepski LR, Joly GD, Erdogan G, Gaddam BN, Aziridine-Functional Photoactive Crosslinking Compounds. U.S. Patent 7,838,110, November 23 (2010)