Advertisement

Springer Nature is making SARS-CoV-2 and COVID-19 research free. View research | View latest news | Sign up for updates

Structural modifications of segmented poly(hydroxyether-siloxane) copolymers

  • 32 Accesses

  • 6 Citations

Summary

Hydroxyether linked copolymers were synthesized from α,ω-bis(aminopropyl)polydimethyl diphenylsiloxane oligomers and diglydicylether of bisphenol-A (DGEBA). The siloxane oligomers were synthesized by the bulk coequilibration of the various weight percents cyclic dimethylsiloxane tetramer (D4) with cyclic diphenylsiloxane tetramer (D4″) using a basic catalyst. The molecular weight and functionality was controlled by the incorporation of 1,3-bis(aminopropyl)-tetramethyldisiloxane end blocker. The copolymers containing low diphenylsiloxane compositions have two Tg's suggesting a microphase separation. Networks containing higher diphenylsiloxane compositions show a single phase morphology. The mechanical behavior of these copolymers is influenced by the composition changes.

This is a preview of subscription content, log in to check access.

References

  1. 1.

    Hedrick, J.L., Haidar, B., Hofer, D.C., Tran, C., McGrath, J.E., Polym. Preprints, submitted (1986).

  2. 2.

    McGrath, J.E., et al, “Epoxy Resin — II,” ed. by R.S. Bauer, ACS Symposium Series (1983).

  3. 3.

    Kantor, S.W., Grubb, W.T., Osthoff, R.C., J. Amer. Chem. Soc., 76, 5190 (1954).

  4. 4.

    Wnuk, A.J., Davidson, T.F., McGrath, J.E., J. Appl. Polym. Sci., Appl. Polym. Sym., 34, 89 (1978).

  5. 5.

    Brandt, P.J.A., Webster, D.C., McGrath, J.E., Polym. Preprints, 25(2), 91 (1984).

Download references

Author information

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Hedrick, J.L., Hofer, D.C., Russell, T.P. et al. Structural modifications of segmented poly(hydroxyether-siloxane) copolymers. Polymer Bulletin 19, 573–578 (1988). https://doi.org/10.1007/BF00283104

Download citation

Keywords

  • Oligomer
  • Mechanical Behavior
  • Weight Percent
  • Single Phase
  • Siloxane