Synthesis of Chemically Crosslinked PVA with Thioxanthone and Cysteine as One Component Polymeric Photoinitiator: Preparation of Nanocomposites as Flexible Films


Güler N., Balcı E. N., Dizman H. M., Arsu N.

7th European Symposium of Photopolymer Science, İstanbul, Turkey, 19 - 22 September 2022, pp.71

  • Publication Type: Conference Paper / Summary Text
  • City: İstanbul
  • Country: Turkey
  • Page Numbers: pp.71
  • Yıldız Technical University Affiliated: Yes

Abstract

Photopolymerization is a method that enables the conversion of liquid resin systems to solid polymer structures with light energy. It has many important advantages such as eco-friendly, less energy requirement, low-cost consumption, solvent-free polymerization, etc [1], [2]. Photoinitiators are one of the most important reactants in the photochemical polymerization systems [2]. Recently, interest in polymeric photoinitiators has been increased. Polymeric photoinitiators are formed by the combination of high molecular weight polymers and low molecular weight photoinitiator molecules. Since polymeric materials are more easily soluble and miscible, low molecular weight photoinitiator systems reduce the problems of lower solubility and miscibility, especially in coatings. Also, the low migration tendency of polymeric photoinitiators and photoproducts means that cured coatings are less tend to yellowing [3], [4]. These photoinitiator systems are used on a commercial scale for a variety of different applications such as curing coatings on various materials, adhesives, printing inks, healthcare and tissue engineering and polymeric nanocomposite materials [2]. In addition, the UV-Curing method, known as green technology, is used in the process of these cured materials with its solvent-free formulations, easy recycling and energy saving features [5]. In this study, previously synthesized polymeric photoinitiator consist of a thioxanthone chromophore group attached to the side chains of the polyvinyl alcohol molecule (PVA-TX-Ct) was used for preparation of polymeric nanocomposite films respectively PVA-TX-Ct@AgNp, PVA-TX-Ct-Cysteine@AgNp, PVA-TX-Ct-Cysteine@SeNp, PVA-TX-Ct@Ag-SeNp and PVA-TX-Ct-Cysteine@Ag-SeNp. The nanoparticles formed depending on the irradiation time were followed by UVVis spectrophotometer.

References

[1] Yagci, Y., Jockusch, S., & Turro, N. J. (2010).Photoinitiated Polymerization: Advances, Challenges, and Opportunities. Macromolecules, 43(15), 6245-6260.

[2] Kazancioglu, E. O., Aydin, M., & Arsu, N. (2021). Photochemical Synthesis of Nanocomposite Thin Films Containing Silver and Gold Nanoparticles with 2-Thioxanthone Thioacetic Acid-Dioxide and Their Role in Photocatalytic Degradation of Methylene Blue. Surfaces and Interfaces, 22, 100793.

[3] Temel, G., & Arsu, N. (2009). One-pot Synthesis of Water-Soluble Polymeric Photoinitiator via Thioxanthonation and Sulfonation Process. Journal of Photochemistry and Photobiology A: Chemistry, 202(1), 63-66

[4] Temel, G., Aydogan, B., Arsu, N., & Yagci, Y. (2009). ‘’Synthesis and Characterization of One-Component Polymeric Photoinitiator by Simultaneous Double Click Reactions and Its Use in Photoinduced Free Radical Polymerization’’ Macromolecules, 42(16), 6098–6106. https://doi.org/10.1021/ma901162y.

[5] Schwalm, R. (2006). UV Coatings: Basics, Recent Developments and New Applications.

Keywords: Photopolymerization, Photoinitiator, Polymeric photoinitiator, Polymeric nanocomposites