Abstract
Polydimethylsiloxane (PDMS), polyhydromethylsiloxane (PHMS), and polymethylphenylsiloxane (PMPhS) have been studied by TOF-SIMS to investigate effects of functional group changes on polymer fragmentation mechanisms. Cyclic fragments are observed in the low mass range spectra of PDMS and PHMS, but not in the spectrum of PMPhS. Effects of functional group substitution on the fragmentation mechanisms of polysiloxanes are evident in the high mass range spectra (>1000 Da). Peaks of oligomers cationized by silver dominate the high mass range of the spectra of all low molecular weight polysiloxanes. However, fragmentation patterns of these samples are different. Neutral cyclic fragments cationized by silver are identified in the high mass range of the spectra of PDMS and PHMS, but not in the spectrum of PMPhS. The major fragments of PHMS and PMPhS are [oligomer-14+Ag]+. The PHMS spectrum also shows peaks [oligomer-28+Ag]+. These distinctive fragmentation patterns can be used to identify the polysiloxanes.
Similar content being viewed by others
References
Hercules, D. M. J. Mol. Structure, 1993, 49, 192.
Bahr, U.; Deppe, A.; Karas, M.; Hillenkamp, F. Anal. Chem., 1992, 64, 2866.
Pasch, H.; Gores, F. Polymer, 1995, 36, 1999.
Malonet, D. R.; Hunt, K. H.; Lord, P. M.; Muir, A. V. G.; Richard, S. N.; Derric, P. J.; Haddleton, D. M. J. Chem. Soc. Chem. Commun. 1995, 5.
Danis, P. O.; Karr, D. E.; Westmoreland, D. G.; Piton, M. C.; Christie, D. I.; Clay, P. A.; Kable, S. H.; Gilbert, R. G. Macromolecules, 1993, 26, 6684.
Pasch, H.; Rode, K. J. Chromatogr. A, 1995, 669, 21.
Montaudo, G.; Montaudo, M. S.; Puglisi, C.; Samperi, F. Macromolecules, 1995, 28, 4562.
Danis, P. O.; Karr, D. E.; Simonsick, W. J.; Wu, D. T. Macromolecules, 1995, 28, 1229.
Bletsos, I. V.; Hercules, D. M.; Magill, J.; Vanleyen, H.; Niehuis, D. E.; Benninghoven, A. Anal. Chem., 1988, 60, 938.
Chiarelli, P. M.; Bletsos, I. V.; Hercules, D. M.; Feld, H.; Leute, A.; Benninghoven, A. Macromolecules, 1992, 25, 6970.
Bletsos, I. V.; Hercules, D. M.; Vanleyen, D.; Benninghoven, A.; Karakatsanis, C. G.; Rieck, J. N. Macromolecules, 1990, 23, 4157.
Feld, H.; Leute, A.; Rading, D.; Benninghoven, A.; Chiarelli, P. M.; Hercules, D. M. Anal. Chem., 1993, 65, 2466.
Zimmerman, P. A.; Hercules, D. M. Anal. Chem., 1993, 65, 983.
Zimmerman, P. A.; Hercules, D. M. Anal. Chim. Acta, 1994, 297, 301–311.
Hittle, L. R.; Hercules, D. M. Surf. Interface Anal., 1994, 21, 217.
Dong, X.; Proctor, A.; Hercules, D. M. Macromolecules, 1997, 30, 63.
Zimmerman, P. A.; Hercules, D. M. Appl. Spectrosc., 1994, 48, 620.
Xu, K.; Hercules, D. M. Mikrochim. Acta, 1996, 122, 1.
Bletsos, I. V.; Hercules, D. M.; Vanleyen, D.; Niehuis, E.; Benninghoven, A. Springer Proc. Phys., 1986, 9, 74.
Niehuis, E.; Heller, T.; Feld, H.; Benninghoven, A. J. Vac. Sci. Technol., 1987, 5, 1243.
Googly, a software program written in Fortune and C on DOS by Andrew Proctor. Author’s address: Quantegy Inc., P. O. Box 190, Opelika, AL 36830.
Newman, J. G.; Carlson, B. A.; Michael, R. S.; Moulder, J. F. Static SIMS Handbook of Polymer Analysis; Perkin-Elmer; MN, 1991.
Voronkov, M. G.; Mileshkevich, V. P.; Yuzheleviskii, Yu, A. The Siloxane Bond; Consultant Bureau: New York, 1972.
CRC Handbook of Chemistry and Physics, 75th ed..; Lide, D. R. Ed.; CRC: Ann Arbor, MI, 1994–1995.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Dong, X., Gusev, A. & Hercules, D.M. Characterization of polysiloxanes with different functional groups by time-of-flight secondary ion mass spectrometry. J Am Soc Mass Spectrom 9, 292–298 (1998). https://doi.org/10.1016/S1044-0305(98)00003-8
Received:
Revised:
Accepted:
Issue Date:
DOI: https://doi.org/10.1016/S1044-0305(98)00003-8