Silicone compound refers to the compound containing si-C bond, and at least one organic group is directly connected to the silicon atom, the habit is also often those through oxygen, sulfur, nitrogen and other organic groups and silicon atoms connected to the compound as silicone compound. Among them, polysiloxane, which is composed of silicon-oxygen bond (-Si-0-Si-) as the skeleton, is the most numerous, the most studied and the most widely used type of silicone compounds, accounting for more than 90% of the total amount
(1) The high energy polysiloxane backbone is shielded by sufficient methyl groups on Si atoms;
(2) The non-polarity of C-H makes the intermolecular interaction very weak;
(3) The length of Si-O bond is longer and the bond Angle of Si-O-Si bond is larger.
(4) Si-O bond is a covalent bond with 50% ionic bond characteristics (covalent bond is directional, ionic bond is not)