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Effect of irradiation on siloxane block copolymers at doses below 100 kGy

  • Radiation Chemistry
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Abstract

A study of radiation-induced changes in polydimethylphenylsilsesquioxane block copolymers demonstrated that the impurities of dimethylcyclosiloxanes (Dx) that are formed in the synthesis of block copolymers disappeared at doses of 10–50 kGy. An increase in the dynamic viscosity (by a factor of 2–3) of 20: 5 and 20: 10 block copolymers irradiated at 50 kGy suggests that the formation of ≡Si-CH-CH2-Si≡ bridges was not solely responsible for a structural rearrangement in the block copolymers. The rheological characteristics of the block copolymers changed under irradiation because of the transformations and interactions of Dx with the matrix.

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Authors and Affiliations

  1. Moscow State University, Leninskie gory, Moscow, 119992, Russia

    L. N. Pankratova, M. G. Zhizhin & N. V. Novoselova

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  1. L. N. Pankratova
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  2. M. G. Zhizhin
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  3. N. V. Novoselova
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Correspondence to L. N. Pankratova.

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Original Russian Text © L.N. Pankratova, M.G. Zhizhin, N.V. Novoselova, 2007, published in Khimiya Vysokikh Energii, 2007, Vol. 41, No. 5, pp. 390–394.

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Pankratova, L.N., Zhizhin, M.G. & Novoselova, N.V. Effect of irradiation on siloxane block copolymers at doses below 100 kGy. High Energy Chem 41, 339–343 (2007). https://doi.org/10.1134/S0018143907050062

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  • DOI: https://doi.org/10.1134/S0018143907050062

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