Novel way to control PDMS cross-linking by gamma-irradiation

abstract

Using a Co-60 gamma source polydimethylsiloxane-based materials have been prepared by gamma-irradiation of a mixture of polydimethylsiloxane, PDMS, silanol-terminated and the tetraethylortosilicate, TEOS, with no other chemicals. Samples were prepared with varying TEOS concentrations. The obtained materials are monolithic, flexible and transparent. X-ray measurements have shown them to be amorphous. The thermal behaviour has also been investigated by using differential scanning calorimetry and thermal gravimetric analysis. The results suggest that TEOS have a tailoring effect on the conformation of the polymer chains, affecting the network formation, as shown by the swelling behaviour of the material. (c) 2008 Elsevier B.V. All rights reserved.

keywords

HYBRID MATERIALS

subject category

Instruments & Instrumentation; Nuclear Science & Technology; Physics

authors

Gomes, SR; Margaca, FMA; Silva, DF; Ferreira, LM; Salvado, IMM; Falcao, AN

our authors

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