Macromolecular Research

The Polymer Society of Korea (한국고분자학회)
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Photostabilization and Cure Kinetics of UV-Curable Optical Resins Containing Photostabilizers

  • Cho, Jung-Dae (Institute of Photonics & Surface Treatment, Q-Sys Co., Ltd.) ;
  • Kim, Sung-Hwa (Optical Solution Lab., Central R&D Institute, Samsung Electro-mechanics) ;
  • Chang, In-Cheol (Optical Solution Lab., Central R&D Institute, Samsung Electro-mechanics) ;
  • Kim, Kwon-Seok (Department of Polymer Science & Engineering, Chosun University) ;
  • Hong, Jin-Who (Department of Polymer Science & Engineering, Chosun University)
  • Published : 2007.10.31
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Abstract

The photostabilization and cure kinetics of UV-curable, optical resins containing various formulations of photostabilizers were investigated to determine the system with the highest cure conversion and durability. Photo-DSC analysis revealed that increasing the concentration of a UV absorber (UVA) decreased both the crosslink density and the cure rate due to competition for the incident photons between the photoinitiator and the UVA, whereas including a hindered amine light stabilizer (HALS) hardly affected either the cure conversion or the cure rate due to its very low absorption of 365 nm. This result was confirmed by FTIR-ATR spectroscopy and UV-visible spectroscopy analyses. QUV ageing experiments showed that the cure conversion and durability were the highest for the UVA/HALS formulation at a ratio of 1 : 2, which is due to their synergistic action.

Keywords

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