Abstract
The cure kinetics for two-component silicone rubber formed by addition reaction was studied by the rheological method. The influence of reaction temperature (T) on the cure kinetics was explored in detail. It was observed that the data of gel time (t gel, i.e. the time when the reaction reaches the gel point) or a specific reaction time (t nc) (defined as the reaction time before which time the influence of confinement of network on the diffusion of reaction components can be neglected) versus T obey certain functional relationship, which was well explained by the cure kinetics model of thermoset network. The cure kinetics for the two-component silicone rubber can be well fitted by the Kamal-Sourour(autocatalyst) reaction model rather than Kissinger model. When the reaction time was before or equal to t nc, the reaction order obtained by the Kamal-Sourour reaction model was 2, which was consistent with the reaction order inferred from the two components chemical reaction when the diffusion of reaction components was not influenced by the formed cross-linked polymer network. When the reaction time was larger than t nc, such as to the end of reaction (t e), the influence of confinement of network on the diffusion of reaction components cannot be neglected, and the reaction order obtained by the Kamal-Sourour reaction model was larger than 2. It was concluded that the confinement effect of network had a greater influence on the cure kinetics of the silicone rubber. The reaction rate constants (k r) under different temperatures were also determined by Kamal-Sourour reaction model. The activation energy (E) for the two-component silicone rubber was also calculated from the results of lnt gel, lnt nc, and lnk r versus 1/T, respectively. The three values of E were close, which indicated that above analyses were self-consistent.
Similar content being viewed by others
References
Saxena, A., Dasgupta, D., Bhat, S., Tiwari, S., Samantara, L. and Wrobel, D., J. Appl. Polym. Sci., 2014, 131: 40125
Madsen, F.B., Daugaard, A.E., Fleury, C., Hvilsted, S. and Skov, A.L., RSC Adv., 2014, 4: 6939
Stricher, A.M., Rinaldi, R.G., Barrès, C., Ganachaud, F. and Chazeau, L., RSC Adv., 2015, 5: 53713
Cai, L.H., Kodger, T.E., Guerra, R.E., Pegoraro, A.F., Rubinstein, M. and Weitz, D., Adv. Mater., 2015, 27: 5132
Lopez, L.M., Cosgrove, A.B., Hernandez-Ortiz, J.P. and Osswald, T.A., Polym. Eng. Sci., 2007, 47: 675
Hong, I.K. and Lee, S., J. Ind. Eng. Chem., 2013, 19: 42
Zhang, H.H., Xu, D.H., Guan, D.B., Yao, W.G. and Shi, T.F., Chem. J. Chinese U., 2015, 36: 788
Berlin, A.A. and Oshmyan, V.G., Polym. Sci. U. S. S. R., 1976, 18: 2612
Kalaee, M.R., Famili, M.H.N. and Mahdavi, H., Polym. Plast. Technol. Eng., 2009, 48: 627
Domínguez, J.C., Alonso, M.V., Oliet, M., Rojo, E. and Rodríguez, F., Thermochim. Acta, 2010, 498: 39
Nishinari, K., Prog. Colloid Polym. Sci., 2009, 136: 87
Núñez, L., Taboada, J., Fraga, F. and Núñez, M.R., J. Appl. Polym. Sci., 1997, 66: 1377
Rubinstein, M. and Colby, R.H., “Polymer physics”, Oxford University Press, New York, 2003
Mani, S., Cassagnau, P., Bousmina, M. and Chaumont, P., Macromolecules, 2009, 42: 8460
Author information
Authors and Affiliations
Corresponding authors
Additional information
This work was financially supported by the National Natural Science Foundation of China (No. 21274152) and the Science and Technology Development Project of Jilin Province, China (No.20150301002GX).
Rights and permissions
About this article
Cite this article
Guan, Db., Cai, Zy., Liu, Xc. et al. Rheological study on the cure kinetics of two-component addition cured silicone rubber. Chin J Polym Sci 34, 1290–1300 (2016). https://doi.org/10.1007/s10118-016-1847-8
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10118-016-1847-8