Novel initiators for the synthesis of propylene oxide oligomers by anionic ring opening polymerization
Por:
Cendejas G., Arreguín F., Flores C., Villalobos I., Flores E., Vázquez F.
Publicada:
30 ene 2008
Resumen:
A series of potassium alcoholates was obtained from the reaction between KOH and ethylene glycol, resorcinol, 4,4'-bisphenol A, 4,4'-(1,3 phenylenediisopropylidene)-bisphenol, 4,4'-sulfonyldiphenol. These salts were employed to initiate the anionic ring opening polymerization of propylene oxide (PO). The molecular weight distribution of the propylene oxide oligomers prepared by this method and the initiator structure were correlated. These oligomers were characterized through Fourier transform infrared (FTIR), nuclear magnetic resonance (NMR) spectroscopies and size exclusion chromatography (SEC). It was found that the molecular weight and polydispersity of the synthesized poly(propylene oxide) (PPO) is highly dependant on the initiator structure and solubility in the reactive medium. The oligomers obtained using di-potassium resorcinolate exhibited a molecular weight distribution more polydisperse than that of PO oligomers synthesized by means of di-potassium ethylene glycolate. In th
Filiaciones:
Cendejas G.:
Programa de Ingeniería Molecular, Instituto Mexicano del Petróleo, Eje Central Norte Lazaro Cardenas 152, San Bartolo Atepehuacan, C.P. 07730, Mexico D.F., Mexico
Arreguín F.:
Programa de Ingeniería Molecular, Instituto Mexicano del Petróleo, Eje Central Norte Lazaro Cardenas 152, San Bartolo Atepehuacan, C.P. 07730, Mexico D.F., Mexico
Flores C.:
Programa de Ingeniería Molecular, Instituto Mexicano del Petróleo, Eje Central Norte Lazaro Cardenas 152, San Bartolo Atepehuacan, C.P. 07730, Mexico D.F., Mexico
Villalobos I.:
Programa de Ingeniería Molecular, Instituto Mexicano del Petróleo, Eje Central Norte Lazaro Cardenas 152, San Bartolo Atepehuacan, C.P. 07730, Mexico D.F., Mexico
Flores E.:
Programa de Ingeniería Molecular, Instituto Mexicano del Petróleo, Eje Central Norte Lazaro Cardenas 152, San Bartolo Atepehuacan, C.P. 07730, Mexico D.F., Mexico
Vázquez F.:
Programa de Ingeniería Molecular, Instituto Mexicano del Petróleo, Eje Central Norte Lazaro Cardenas 152, San Bartolo Atepehuacan, C.P. 07730, Mexico D.F., Mexico
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