Determination of Processing Parameters Affecting the Conversion and Thermal Stability of Photocurable Acrylate-based Binder

아크릴계 광바인더의 전환율과 열안정성 향상을 위한 공정변수 결정

  • 김병철 (한국생산기술연구원 청정공정소재연구그룹) ;
  • 서동학 (한양대학교 화학공학부) ;
  • 채헌승 (코오롱인더스트리) ;
  • 신승한 (한국생산기술연구원 청정공정소재연구그룹)
  • Published : 2012.02.10

Abstract

Photocurable binder for a transparent glass fiber composite was prepared with alicyclic methacrylate and fluorene-based diacrylate. ANOVA (analysis of variance) analysis was used to know main factors affecting the conversion of photocurable binder. It showed radiation intensity and photoinitiator (PI) concentration were main factors. The conversion of photocurable binder was simply increased with radiation intensity. Its increment however was abated with increasing PI concentration. We found that average conversion of the binder measured by FTIR-ATR was 87% when it was exposed to $5J/cm^2$ of UV dose with 5 wt% of PI. Oxime ester type PI was very effective to get a high degree of conversion, but it caused a yellowing problem. Owing to post-baking process, UV cured film showed an improved thermal stability by increase of conversion and removal of volatile organic compounds. TG% at $260^{\circ}C$ of film cured with 5 wt% of PI (TPO+MBF) and $5J/cm^2$ of UV radiation increased from 95.4 to 99.0% by post-baking at $230^{\circ}C$ for 5 min.

Keywords

photocurable binder;transparent composite;conversion;thermal stability;post-baking

References

  1. B. A. MacDonald, K. Rollins, D. MacKerron, K. Rakos, R. Eveson, K. Hashimoto, and B. Rustin, Flexible Flat Panel Displays, ed. G. P. Crawford, 11, John Wiley & Sons Inc., Chichester (2005).
  2. W. A. MacDonald, J. Mater. Chem., 14, 4 (2004). https://doi.org/10.1039/b310846p
  3. W. A. MacDonald, M. K. Looney, D. MacKerron, R. Eveson, R. Adam, K. Hashimoto, and K. Rakos, J. of the SID, 15/12, 1075 (2007).
  4. K. Suzuki, Material Stage, 2, 34 (2002).
  5. S. Angiolini, M. Avidano, R. Bracco, C. Barlocco, N. G. Young, M. Trainor, and X.-M. Zhao, SID Symposium Digest Tech Papers, 34, 1325 (2003)
  6. M.-C. Choi, J. Wakita, C.-S. Ha, and S. Ando, Macromolecules, 42, 5112 (2009). https://doi.org/10.1021/ma900104z
  7. S. Yamamoto, 電子材料, 12, 43 (2007).
  8. W.-Y. Chen, K. S. Ho, T.-H. Hsieh, F.-C. Chang, and Y.-Z. Wang, Macromol. Rapid Commun., 27, 452 (2006). https://doi.org/10.1002/marc.200500747
  9. S. Wang, Z. Liang, P. Gonnet, P. Liao, B. Wang, and C. Zhang, Adv. Funct. Mater., 17, 87 (2007). https://doi.org/10.1002/adfm.200600760
  10. Y. Rao and T. N. Blanton, Macromolecules, 41, 935 (2008). https://doi.org/10.1021/ma7020216
  11. J. Jin, J.-H. Ko, S. Yang, and B.-S. Bae, Adv. Mater., 22, 4510 (2010). https://doi.org/10.1002/adma.201002198
  12. JP Patent 2003-195291 (2003).
  13. U.S. Patent 7,132,154 (2006).
  14. Sumilite $TTR^{(R)}$, Sumitomo Bakelite Co. Ltd., FilmTech Japan (2011).
  15. JP Patent 2005-350971 (2005)
  16. M. Tawada, J. Photopolym. Sci. Technol., 23, 465 (2010). https://doi.org/10.2494/photopolymer.23.465
  17. R. Schwalm, UV Coatings; Basics, Recent developments and New application, 162, Elsevier, Amsterdam (2007).
  18. C. Decker, Handbook of Polymer Science and Technology, vol. 3, ed. N. P. Cheremisinoff, 541, Marcel Dekker Inc., New York (1989).
  19. K. Studer, C. Decker, E. Beck, and R. Schwalm, Prog. Org. Coat., 48, 92 (2003). https://doi.org/10.1016/S0300-9440(03)00120-6
  20. T. Scherzer, Vibr. Spectrosc., 29, 139 (2002). https://doi.org/10.1016/S0924-2031(01)00202-8
  21. G. Socrates, Infrared and Raman Characteristic Group Frequencies, 3rd ed., 140, John Wiely & Sons Ltd., Chichester (2001).