Article | REF: N2880 V1

Silicones or siloxanes - Structure and properties

Author: Michel BIRON

Publication date: October 10, 2007

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1. General structure

Figure 1 shows the fundamental difference between the skeletons of a silicone and a polyacetal, with the silicon atom replaced by a carbon atom.

  • Silicon-oxygen linkages have special properties compared with purely organic polymers:

    • limited variation of characteristics over a wide range of temperatures, from - 80 to + 250 C for some ;

    • good resistance to various thermal and chemical aggressions;

    • flexibility, but limited mechanical performance and low gas impermeability ;

    • non-stick and lubricating properties ;

    • electrical insulating capacity.

    • ...
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General structure