Silanol terminated polydimethylsiloxane - 70131-67-8

Key Functions: Plasticizers & Polymer

The most common liquid silicones are PDMS. These polymers have extremely low glass transition temperatures (i.e., the temperature at which the reversible transition occurs from a hard and relatively brittle state into a molten or rubber-like state for amorphous materials), resistance to high temperature, oxidation, vapor permeability, and hydrophobicity (Xiameter 2009). The silanol groups of the silanol-terminated PDMS polymers render the PDMS susceptible to condensation under both acid and base conditions (Stealth 316 2002). The condensation of silanol groups form siloxane bonds which are used to cross-link siloxanes in commercial applications and to take full advantage of the unique properties of PDMS polymers (Xiameter 2009).

Chemical Synonyms Hydroxy-terminated dimethyl siloxanes and silicones; Poly(oxy(dimethylsilyene), alpha-hydro, omega-hydroxy-; Polydimethylsiloxane, hydroxyl end-blocked; Silanol-terminated di-Me siloxanes; alpha-Hydro-omega-hydroxypoly(dimethylsiloxane); Siloxanes and silicones di-Me, hydroxyl-terminated 42% in dimethyl hydrolyzate; Siloxanes and silicones, di-Me, hydroxyl-terminated (ChemIDplus 2013)

---