Comparison Of The Dynamic Curing Kinetics Of Araldite DLS 772 / 4 4' DDS Epoxy System Using Differential Scanning Calorimetry And Microwave Heated Calorimeter
Babatunde Bolasodun, Alan Nesbitt, Arthur Wilkinson, Richard Day
Keywords- curing; differential scanning calorimetry; epoxy; microwave heated calorimeter; kinetics
Abstract: - Comparative studies were carried out on the curing kinetics of an epoxy resin Araldite DLS 772 mixed with a hardener, 4 4' Diaminodiphenyl sulfone. Differential scanning calorimetry and a microwave heating calorimeter were used to monitor the curing kinetics of conventionally and microwave cured epoxy samples. These studies were carried out under non-isothermal conditions using five different heating rates. There was a significant increase in the fractional conversion of the microwave cured samples compared to the conventionally cured samples. The curing reactions for samples cured using microwave heating took place over a smaller temperature range. Higher reaction rates were observed in the samples cured using microwave heating. The activation energies of the microwave cured samples of Araldite DLS 772 / 4 4'DDS epoxy system were about ten percent lower than activation energies of conventionally cured samples.
 Boey, F.Y.C. and B.H. Yap, Microwave curing of an epoxy-amine system: effect of curing agent on the glass-transition temperature. Polymer testing, 2001. 20(8): p. 837-845.H. Poor, “A Hypertext History of Multiuser Dimensions,” MUD History, http://www.ccs.neu.edu/home/pb/mud-history.html. 1986. (URL link *include year)
 Navabpour, P., et al., Comparison of the curing kinetics of the RTM6 epoxy resin system using differential scanning calorimetry and a microwave-heated calorimeter. Journal of Applied Polymer Science, 2006. 99(6): p. 3658-3668.
 Hill, D.J.T., G.A. George, and D.G. Rogers, A systematic study of the microwave and thermal cure kinetics of the DGEBA/DDS and DGEBA/DDM epoxy-amine resin systems. Polymers for Advanced Technologies, 2002. 13(5): p. 353-362.
 Navabpour, P., et al., Comparison of the curing kinetics of a DGEBA/acid anhydride epoxy resin system using differential scanning calorimetry and a microwave-heated calorimeter. Journal of Applied Polymer Science, 2007. 104(3): p. 2054-2063.D.S. Coming and O.G. Staadt, "Velocity-Aligned Discrete Oriented Polytopes for Dynamic Collision Detection," IEEE Trans. Visualization and Computer Graphics, vol. 14, no. 1, pp. 1-12, Jan/Feb 2008, doi:10.1109/TVCG.2007.70405. (IEEE Transactions )
 Costa, M., L. Pardini, and M. Rezende, Influence of Aromatic Hardeners in the cure kinetics. Materials Research, 2005. 8: p. 65-70.
 Mijovic, J. and J. Wijaya, Comparative calorimetric study of epoxy cure by microwave vs thermal energy. Macromolecules, 1990. 23(15): p. 3671-3674.J. Williams, “Narrow-Band Analyzer,” PhD dissertation, Dept. of Electrical Eng., Harvard Univ., Cambridge, Mass., 1993. (Thesis or dissertation)
 Salla, J.M. and X. Ramis, Comparative study of the cure kinetics of an unsaturated polyester resin using different procedures. Polymer Engineering and Science, 1996. 36(6): p. 835-851.
 Ramis, X. and J.M. Salla, Effect of the initiator content and temperature on the curing of an unsaturated polyester resin. Journal of Polymer Science Part B: Polymer Physics, 1999. 37(8): p. 751-768.
 Doyle, C.D., Kinetic analysis of thermogravimetric data. Journal of Applied Polymer Science, 1961. 5(15): p. 285-292J.M.P. Martinez, R.B. Llavori, M.J.A. Cabo, and T.B. Pedersen, "Integrating Data Warehouses with Web Data: A Survey," IEEE Trans. Knowledge and Data Eng., preprint, 21 Dec. 2007, doi:10.1109/TKDE.2007.190746.(PrePrint)
 Ozawa, T., Kinetic analysis of derivative curves in thermal analysis. Journal of thermal analysis and calorimetry, 1970. 2(3): p. 301-324
 Kissinger, H.E., Reaction kinetics in differential thermal analysis. Analytical Chemistry, 1957. 29(11): p. 1702-1706.
 Thostenson, E.T. and T.W. Chou, Microwave processing: fundamentals and applications. Composites Part A: Applied Science and Manufacturing, 1999. 30(9): p. 1055-1071.
 Jacob, J., L.H.L. Chia, and F.Y.C. Boey, Thermal and non-thermal interaction of microwave radiation with materials. Journal of Materials Science, 1995. 30(21): p. 5321-5327.
 Marand, E., K.R. Baker, and J.D. Graybeal, Comparison of reaction mechanisms of epoxy resins undergoing thermal and microwave cure from in situ measurements of microwave dielectric properties and infrared spectroscopy. Macromolecules, 1992. 25(8): p. 2243-2252.
 Wei, J., et al., Comparison of microwave and thermal cure of epoxy resins. Polymer Engineering and Science, 1993. 33(17): p. 1132-1140