Synthesis of Cyclolinear Polyorganocarbosiloxanes Capable
of Self-Organization¹

T. V. Astapova*, E. V. Matukhina**, P. V. Petrovskii*, I. V. Blagodatskikh*,
N. N. Makarova*, and Yu. K. Godovsky***

* Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences,
ul. Vavilova 28, Moscow, 117813 Russia

** Moscow State Pedagogical University,
ul. Malaya Pirogovskaya 1, Moscow, 119882 Russia

*** Karpov Institute of Physical Chemistry, State Research Center of the Russian Federation,
ul. Vorontsovo pole 10, Moscow, 103064 Russia

Received December 24, 1997;
Revised Manuscript Received November 24, 1998

Abstract—Cyclolinear polyorganocarbosiloxanes were synthesized by the polyaddition reaction of dihydroor-
ganocyclotetra(hexa,octa)siloxanes with divinylorganocyclotetra(hexa,octa)siloxanes in the presence of plati-
num catalysts. The effects of various forms of Pt colloids, which were obtained by reducing Pt complex com-
pounds, on the structure and properties of the resulting polymers were studied by gel-permeation chromato-
graphy and ²⁹Si NMR spectroscopy. The phase transition temperatures were determined by DSC, X-ray
diffraction analysis, and optical microscopy. It was shown that a noncrystallizable polymer bearing decaethtyl-
cyclohexasiloxane fragments is mesomorphic and forms a hexagonal 2D structure of the columnar type.

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