Silicone physical structure
Silicone materials have a unique structure:
(1) （1）Adequate methyl groups on Si atoms shield the high-energy polysiloxane backbone;
(2) (2) C-H non-polarity, so that the interaction between molecules is very weak;
(3) （3）Si-O bond length is longer, Si-O-Si bond bond angle.
(4) （4）The Si-O bond is a covalent bond with a 50% ionic bond (the covalent bond has a directionality and the ion bond has no directionality).