Platinum Metals Rev., 1999, 43, (1), 40
Determining Oxygen in Polymers
A new method of determining the oxygen content in organosilicon polymers and organic materials is described by M. Aramata and T. Igarashi of Shin-Etsu Chemical Co. Ltd., and J. Okayama and M. Ikeda of HORIBA Ltd., in Japan (Anal. Sci ., 1998, 14, (3), 541–546). The silicon-silicon bonds in the polymers, which give them their unique electronic and optical properties, are easily oxidised to Si-O-Si resulting in loss of performance.
Oxygen content was investigated in an inertgas fusion converter where samples of polyorganosiloxane/silicone and organosilicon polymers were pyrolysed in a furnace at 2600°C. Further reduction by a heated platinum/carbon catalyst gave carbon monoxide, which could be determined by an IR absorption technique.