Synthesis, structure and thermogravimetric analysis of alpha,omega-telechelic polydimethylsiloxanes of low molecular weight

Aleksandra Tasić, Marija Pergal, Mališa Antić, Vesna Antić

Abstract


A series of a,w-telechelic polydimethylsiloxanes (PDMS), with predetermined molecular weights of about 2500 g mol-1, was synthesized by siloxane equilibration reaction. Syntheses were performed using octa­methylcyclotetrasiloxane (D4) and various disiloxanes: hexame­thyl­disiloxane (HMDS), tetramethyldisiloxane (TMDS), 1,3-divinyl­tetramethyl-disiloxane (DVTMDS), 1,3-bis(3-carboxypropyl)tetra­methyldisil­oxane (DCPTMDS) and 1,3-bis(3-aminopropyl)tetramethyldisiloxane (DAPTMDS). The role of disiloxane was to introduce terminal functional groups at the end of polymer chains and to control molecular weight of the polymers. Polymers with trimethyl, hydrido, vinyl, carboxypropyl and aminopropyl end-groups were obtained in this way. The structure of a,w-telechelic PDMSs was confirmed by NMR and IR spectroscopy. Molecular weights of the polymers were determined by 1H NMR, gel-permeation chromatography(GPC) and viscometry of dilute solutions. Thermogravimetric analysis(TGA) in nitrogen and air showed that the type of terminal groups significantly influences thermal and thermo-oxidative stability, as well as the degradation mechanism of a,w-telechelic PDMSs.


Keywords


alpha,omega-telechelic PDMS; siloxane equilibration; thermal and thermo-oxidative degradation

Full Text:

PDF (1,950 kB)

References


I. Yilgor, J. E. McGrath, Adv. Polym. Sci. 86 (1988) 1

M. G. Voronkov, V. P. Mileshkevich, Yu. A. Yuzheleviskii, The Siloxane Bond, Consultants Bureau, New York, 1978

P. R. Dvornić, R. W. Lenz, High Temperature Siloxane Elastomers, Huthing und Wept Verlag, Basel, Heidelberg, New York, 1991

K. Kojima, C. R. Gore, C. S. Marvel, J. Polym. Sci., Part A 1 (1966) 2326

J.S. Riffle, I. Yilgor, C. Tran, G.L. Wilkes, J.E. McGrath, A.K. Banthia, Elastomeric Polysiloxane Modifiers for Epoxy Networks: Synthesis of Functional Oligomers and Network Formations Studies in Epoxy Resin Chemistry, ed. by R.S. Bauer, ACS Symposium Series 221, ACS, Washington, 1983

A. Ekin, D. C. Webster, J. Polym. Sci., Part A: Polym. Chem. 44 (2006) 4880

M. N. Govedarica, P. R. Dvornić, J. Serb. Chem. Soc. 56 (1991) 7

P. R. Dvornić, M. N. Govedarica, J. D. Jovanović, V. V. Gerov, M. P. Antić, Polym. Bull. 35 (1995) 539

M. Cazacu, M. Marcu, A. Vlad, D. Caraiman, C. Racles, Eur. Polym. J. 35 (1999) 1629

V. M. Đinović, V. V. Antić, J. Đonlagić, M. N. Govedarica, React. Funct. Polym. 44 (2000) 299

P. M. Antić, M. V. Vučković, V. V. Antić, M. N. Govedarica, Mater. Sci. Forum 453-454 (2004) 199

A. Gehrig, K. Humburg, K. T. Nguyen, M. D. Telgenhoff, R. Wells (Dow Corning Corporation, Midland, MI, USA) US Patent 8 686 175 (2014)

E. R. Evans (General Electric Company, Waterford, NY, USA), US Patent 4 122 247 (1978)

U. Finke, H. H. Moretto (Bayer Aktiengesellschaft, DE) US Patent 4 310 679 (1982)

B. A. Janeiro (Gelest, Inc., Morrisville, PA, USA), US Patent 0 176 561 A1 (2004)

J. D. Jovanović, M. N. Govedarica, P. R. Dvornić, I. G. Popović, Polym. Degrad. Stabil. 61 (1998) 87

S. Andre, F. Guida-Pietrasanta, A. Rousseau, B. Boutevin, G. Caporiccio, Polymer 42 (2001) 5505

G. Camino, S.M. Lomakin, M. Lazzari, Polymer 42 (2001) 2395

G. Camino, S.M. Lomakin, M. Lageard, Polymer 43 (2002) 2011

Girish Deshpande, Mary E. Rezac, Polym. Degrad. Stabil. 76 (2002) 17

S. Zhang, H. Wang, J. Therm. Anal. Calorim. 103 (2011), 711

M. A. Brook, “Silicon in Organic, Organometallic, and Polymer Chemistry”, J. Wiley and Sons, New York (2000)

S. J. Clarson, “Depolymerization, Degradation and Thermal Properties of Siloxane Polymers” in “Siloxane Polymers”, Eds. S.J. Clarson and J.A. Semlyen, Polym. Sci. Techn. Series, Elis Horwood-PTR Prentice Hall, Englewood Cliffs (1993)

P. R. Dvornic, “Thermal Properties of Polysiloxanes” in “Silicon-Containing Polymers”, Eds. R.G. Jones, W. Ando and J. Chojnowski, Kluwer Academic Publishers, Dordrecht, the Netherlands (2000)

P. R. Dvornić, J. D. Jovanović, M. N. Govedarica, J. Appl. Polym. Sci., 49 (1993) 1497

A. C. M. Kuo, “Poly(dimethylsiloxane” in “Polymer Data Handbook”, Ed. J. E. Mark, Oxford University Press, Oxford (1999)

P. R. Dvornic, “Thermal Properties of Polysiloxanes” in “Silicon-Containing Polymers”, Eds. R.G. Jones, W. Ando and J. Chojnowski, Kluwer Academic Publishers, Dordrecht, the Netherlands (2000)

Yu. A. Aleksandrova, J. S. Nikitina, A. N. Pravednikov, Vysokomol. Soedin., Ser. A, 10, (1968) 1078

V. V. Rode, V. A. Verkhotin, S. R. Rafikov, Vysokomol. Soedin., Ser. A, 11 (1969) 1529

T. H. Thomas, T. C. Kendrick, J. Polym. Sci., Part A-2, 7 (1969) 537

N. Grassie, I. G. Macfarlane, Eur. Polym. J., 14 (1978) 875

A. J. Barry, J. Appl. Phys. 17 (1946) 1020

M. Kurata, Y. Tsunashima, Polymer Handbook, 3rd ed.; Eds. J. Brandrup and E. H. Immergut, J. Wiley and Sons, New York (1989)

C. L. Willis (Kraton Polymers, U.S. LLC, Houston, TX USA), US Patent 8 263 713 B2 (2012)

Clarson, S.J., “Depolymerization, Degradation and Thermal Properties of Siloxane Polymers”, in “Siloxane Polymers”, Clarson, S.J.; Semlyen, J.A.; Eds., Polym. Sci. Techn. Series, Elis Horwood-PTR Prentice Hall, Englewood Cliffs, 1993

T. H. Thomas, T.C. Kendrick, J. Polym. Sci., Part A-2, 8 (1970) 1823

K. A. Andrianov, “Metalorganic Polymers”, Interscience, New York (1965




DOI: http://dx.doi.org/10.2298/JSC170427082T

Refbacks

  • There are currently no refbacks.


Copyright (c) 2017 J. Serb. Chem. Soc.

Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

IMPACT FACTOR 0.822 (131 of 166 journals)
5 Year Impact Factor 1.015 (118 of 166 journals)