Summary
A method has been developed to stop the crosslinking reaction of a polydimethylsiloxane system without disturbing the state of the sample. Oscillatory shear experiments on samples just before and just beyond the gelation point demonstrated the transition of the material from a viscoelastic liquid to a viscoelastic solid. At the gel point the loss modulus and the storage modulus were found to be identical over several decades of frequency and for temperatures ranging between -50°C and +180°C. Both moduli were proportional to the square root of the frequency.
Similar content being viewed by others
References
E.M. Valles, C.W. Macosko, Macromolecules 12, 521 (1979).
P.J. Flory, “Principles of Polymer Chemistry”, Cornell University Press, Ithaca, New York, (1953).
W.H. Stockmayer, J. Pol. Sci. 9, 69 (1952).
D.R. Miller, C.W. Macosko, Pol. Eng. Sci. 19, 272 (1979).
C.B. Kauffman, D.O. Cowan, in “Inorganic Synthesis” Vol. 6, E.G. Rochow, Ed., McGraw-Hill, New York, 214 (1969).
C.Y.M. Tung, P.J. Dynes, J. Appl. Pol. Sci. 27, 569 (1982).
J.D. Ferry, “Viscoelastic Properties of Polymers”, Wiley, New York, (1980).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Chambon, F., Winter, H.H. Stopping of crosslinking reaction in a PDMS polymer at the gel point. Polymer Bulletin 13, 499–503 (1985). https://doi.org/10.1007/BF00263470
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF00263470