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Preparation of Cyclic Polysiloxanes

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Cyclic Polymers

Abstract

In studies of ring-chain competition, the polysiloxanes have probably been treated in greater detail than any other synthetic polymer system. They have also proved to be the most convenient source of cyclic material for investigations of the properties of cyclic polymers. Several factors combine to make the polysiloxanes eminently suitable for such purposes. High proportions of cyclic material are generated together with linear components of high molecular weight, so facilitating the separation of cyclic from linear material. While they are generally highly reactive in the presence of certain polymerization or equilibration catalysts, they have excellent thermal stability and adequate chemical stability to allow accurate and reliable analysis and experimentation. In this chapter, we describe the essential procedures which have been followed in preparing and analysing the products of cyclization reactions and in separating fractions of cyclic siloxane material.

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Author information

Authors and Affiliations

  1. Department of Ceramics, Glasses and Polymers, University of Sheffield, UK

    P. V. Wright

  2. Department of Chemistry, University of Aston, Birmingham, UK

    Martin S. Beevers

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  1. P. V. Wright
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  2. Martin S. Beevers
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Editors and Affiliations

  1. Department of Chemistry, University of York, UK

    J. A. Semlyen

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© 1986 Elsevier Applied Science Publishers Ltd

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Wright, P.V., Beevers, M.S. (1986). Preparation of Cyclic Polysiloxanes. In: Semlyen, J.A. (eds) Cyclic Polymers. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-4175-5_3

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  • DOI: https://doi.org/10.1007/978-94-009-4175-5_3

  • Publisher Name: Springer, Dordrecht

  • Print ISBN: 978-94-010-8354-6

  • Online ISBN: 978-94-009-4175-5

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