Dimethylpolysiloxane vs. Polydimethylsiloxane — What's the Difference?

Polydimethylsiloxane (PDMS), also known as dimethylpolysiloxane or dimethicone, belongs to a group of polymeric organosilicon compounds that are commonly referred to as silicones. PDMS is the most widely used silicon-based organic polymer, as its versatility and properties lead to many applications.It is particularly known for its unusual rheological (or flow) properties.

(chemistry) The simplest silicone, being a polymer having a repeat unit of -Si(CH₃)₂-O- ; its properties depend on the degree of polymerization and range from that of an oil to a plastic