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Polypropylene glycol - Polymerization | | Polypropylene glycol - Polymerization: Encyclopedia II - Polypropylene glycol - Polymerization | | Polypropylene glycol is produced by anionic ring-opening polymerization of propylene oxide. The initiator is an alcohol and the catalyst a base usually potassium hydroxide. When the initiator is ethylene glycol or water the polymer is linear. With a multifunctional initiator like glycerine, pentaerythritol or sorbitol the polymer branches out.
Conventional polymerization of propylene oxide results in an atactic polymer. The isotactic polymer only exist in the laboratory. It can be produced from optically active propylene glycol but at ...
See also:Polypropylene glycol, Polypropylene glycol - Polymerization, Polypropylene glycol - Properties, Polypropylene glycol - Uses | | | Polypropylene glycol, Polypropylene glycol - Polymerization, Polypropylene glycol - Properties, Polypropylene glycol - Uses | | |
| | | Polypropylene glycol: Encyclopedia II - Polypropylene glycol - Polymerization
Polypropylene glycol - Polymerization
Polypropylene glycol is produced by anionic ring-opening polymerization of propylene oxide. The initiator is an alcohol and the catalyst a base usually potassium hydroxide. When the initiator is ethylene glycol or water the polymer is linear. With a multifunctional initiator like glycerine, pentaerythritol or sorbitol the polymer branches out.
Conventional polymerization of propylene oxide results in an atactic polymer. The isotactic polymer only exist in the laboratory. It can be produced from optically active propylene glycol but at a high cost. A salen cobalt catalyst has recently been reported to provide isotactic polymerization of the racemic propylene glycol 1.
Other related archivesSolubility, alcohol, anionic, atactic, base, catalyst, cobalt, end-group, ethylene glycol, glycerine, hydroxyl, initiator, isotactic, molar mass, optically active, pentaerythritol, polyethylene glycol, polymer, polymerization, polyurethanes, potassium hydroxide, propylene glycol, propylene oxide, racemic, rheology, ring-opening polymerization, salen, sorbitol, tonne, water
 Adapted from the Wikipedia article "Polymerization", under the G.N U Free Docmentation License. Please also see http://en.wikipedia.org/wiki |
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