Abstract
Experimental bis-GMA/TEGDMA/urethane resins were investigated using synthesized urethane monomers to improve thermal properties. DTA (differential thermal analysis) results show that curing temperatures were 160 and 165°C in bis-GMA-based resins containing the synthetic 2 HEMA/N 3500 urethane monomer, 150°C in the resin containing the 2 HEMA/HT urethane monomer, and 153°C in the urethane monomer derived from 2 HEMA/N 3500. Also, DSC (differential scanning calorimetry) results show that the value of activation for polymerization during heating is lower in bis-GMA/TEGDMA containing synthesized urethane monomer (1.89, 2.44, 2.50 kcal/mol) than undiluted urethane monomer (7.50 kcal/mol) when these synthesized urethane monomers were diluted with bis-GMA/TEGDMA. With the use of urethane monomer as an additive to bis-GMA/TEGDMA it is possible to cure more rapidly with lower activation energy.
Similar content being viewed by others
References
T. W. Wilson and D. T. Turner, J. Dent. Res. 66 (1987) 1032.
H. Urabe, K. Wakasa and M. Yamaki, J. Mater. Sci. Mater. Med. 1 (1990) 163.
H. Urabe, K. Wakasa and M. Yamaki, J. Mater. Sci. 26 (1991) 3185.
A. M. Khan, H. Suzuki, Y. Nomura, M. Taira, K. Wakasa, H. Shintani and M. Yamaki, J. Oral Rehabil. 19 (1992) 361.
A. Peuzfeldt and E. Asmussen, J. Dent. Res. 70 (1992) 1537.
J. M. Antonucci and E. E. Toth, J. Dent. Res. 62 (1983) 121.
M. G. Buonocore and C. A. Casciani, NY State Dent. J. 35 (1969) 135.
J. F. McCabe, Dent. Mater. 1 (1985) 231.
T. Hirose, K. Wakasa and M. Yamaki, J. Mater. Sci. 25 (1990) 932.
S. Ban and J. Hasegawa, Dent. Mater. J. 3 (1984) 85.
J. Vaidyanathan, T. K. Vaidyanathan, Y. Wang and T. Viswanadhan, J. Oral Rehabil. 19 (1992) 49.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Priyawan, R., Wakasa, K., Chowdhury, N.A. et al. Improvement of bis-GMA-based resins by urethane linkages: DTA and DSC thermal properties. J Mater Sci: Mater Med 6, 1–4 (1995). https://doi.org/10.1007/BF00121237
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF00121237