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


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.




Instruments & Instrumentation; Nuclear Science & Technology; Physics


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

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