Abstract
Polyborates have been formed by disproportionation and polycondensation of trimethoxyboroxine and also of trimethoxyboroxine and boric acid. The crtiical role of stoichiometry in the formation of polyborates without requiring incorporation of a metal counter ion is revealed. The emphasis is on integration of this chemistry with fabrication processes. Incorporation of an appropriate linear organic polymer is shown to yield the required rheological and thermal characteristics in this regard. These polyborates are inferred to be suitable as precursors for boron nitride in geometrical forms that can be processed as supported structures. However, they are also determined to be unsuitable as precursors for boron nitride fibers, oriented or isotropic, primarily due to their low glass transition temperature.
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References
H. Steinberg, Organoboron Chemistry, Vol. 1 (John Wiley & Sons, New York, NY, 1964).
G.L. O'Connor and H.R. Nace, J. Am. Chem. Soc. 77, 1578 (1955).
N. Venkatasubramanian, B. Wade, P. Desai, A.S. Abhiraman, and L.T. Gelbaum, Polym. Mat. Sci. Eng. (ACS Proceedings), 62, 614 (1990).
N. Venkatasubramanian, B. Wade, P. Desai, A.S. Abhiraman, and L.T. Gelbaum, J. Non-Cryst. Solids 130, 144 (1991).
J.O. Edwards and V. Ross, J. Inorg. Nucl. Chem. 15, 329 (1960).
B. Wade, N. Venkatasubramanian, P. Desai, A.S. Abhiraman, L.T. Gelbaum, and E.C. Ashby, Polym. Mat. Sci. Eng. (ACS Proceedings) 64, 377 (1991).
B. Wade, D. Mohr, N. Venkatasubramanian, P. Desai, and A.S. Abhiraman, Polym. Preprints (ACS Proceedings) 32, 554 (Fall 1991).
G. Winter, W. Verbeek, and M. Mansmann, U.S. Patent 3,892,583 (1975).
S. Horikiri, K. Tsuji, Y. Abe, A. Fukui, and E. Ichiki, Japan Patent 49108325 (1974).
S. Horikiri, K. Tsuji, Y. Abe, A. Fukui, and E. Ichiki, Japan Patent 5012335 (1975).
B.E. Wade, Boron Nitride Fibers From Polymer Precursors, Ph.D. Thesis, Georgia Institute of Technology, (1992).
D.W. Aubrey, M.F. Lappert, and H. Pyozora, J. Chem. Soc., Part II, 1931 (1961).
C. Pistorius, J. Chem. Phys. 31, 1454 (1959).
K. Niedenzu, W. Sawodny, H. Watanabe, J.W. Dawson, T. Totani, and W. Weber, Inorg. Chem. 6, 1453 (1967).
E.G. Brame, Jr., J.L. Morgrave, and V.W. Meloche, J. Inorg. Nucl. Chem. 5, 48 (1957).
A. Shelnutt, B. Morosin, D. Emin, A. Mullendore, and G. Slack, in Boron-Rich Solids, edited by R.G. Lerner (American Institute of Physics, New York, NY, 1986), p. 312.
W.J. Lehmann and I. Shapiro, Spectrochimica Acta 17, 396 (1961).
G.S. Parks and M.E. Spaght, Phys. 6, 69 (1935).
A. Napolitano, P.B. Macedo, and E.G. Hawkins, J. Am. Ceram. Soc. 48, 613 (1965).
J. Boow, Phys. Chem. Glasses 8, 45 (1967).
A.E. Lindemanis, in Emergent Process Methods For High-Technology Ceramics, edited by R.F. Davis, H. Palmour, and R.L. Porter (Plenum Press New York, NY, 1984), p. 111.
M.W. Chase, Jr., C.A. Daview, J.R. Downey, Jr., D.J. Frurip, R.A. McDonald, and A.N. Syverud, JANAF Thermochemical Tables (American Chemical Society and American Institute of Physics, third edition, 1986), p. 14.
J. Economy, R.V. Anderson, and V.I. Matkovich, App. Polym. Sym. 9, 377 (1969).
J. Thomas, Jr., N.E. Weston, and T.E. O'Connor, J. Am. Chem. Soc. 84, 4619 (1963).
L.A. Wall, Soc. Plastic Eng. J. 16, 810 (1960).
J. Krogh-Moe, J. Non-Cryst. Solids 1, 269 (1969).
J. Economy and R.V. Anderson, Text. Res. J. 36, 994 (1966)
J. Economy and R.V. Anderson, J. Polym. Sci. 19, 283 (1967).
R.Y. Lin, J. Economy, H.H. Murty, and R. Ohnsorg, App. Polym. Sym. 29, 175 (1976).
J. Economy and R. Anderson, Inorg. Chem. 5, 989 (1966).
C.J. Brinker, K.J. Ward, K.D. Keefer, E. Holupka, and P.J. Bray, in Better Ceramics Through Chemistry II, edited by C.J. Brinker, D.E. Clark, and D.R. Ulrich (Materials Research Society, Pittsburgh, PA, 1986), p. 57.
C.J. Brinker, K.J. Ward, K.D. Keefer, E. Holupka, P.J. Bray, and P.K. Pearson, in Aerogels, edited by J. Fricke (Springer, Berlin, 1986), p. 57.
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Wade, B., Venkatasubramanian, N., Desai, P. et al. Synthesis and characterization of processable polyborate precursors. J Sol-Gel Sci Technol 5, 15–25 (1995). https://doi.org/10.1007/BF00486707
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DOI: https://doi.org/10.1007/BF00486707