INTEMA   05428
INSTITUTO DE INVESTIGACIONES EN CIENCIA Y TECNOLOGIA DE MATERIALES
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
A straightforward method to synthesize telechelic poly(dimethylsiloxane)s
Autor/es:
M SOLEDAD LENCINA; FRANCO LEONARDO REDONDO; MARCELO A. VILLAR; VIVINA HANAZUMI; CAMILA MÜLLER; CRISTIAN VITALE; MARIO D. NINAGO; ANDRÉS E. CIOLINO
Lugar:
Ghent
Reunión:
Congreso; The 12th International Conference on Advanced Polymers via Macromolecular Engineering (APME 2017); 2017
Institución organizadora:
Organising and Scientific Committee Advanced Polymers via Macromolecular Engineering
Resumen:
One of the goals of polymer chemistry is developing new methodologies for the controlled synthesis of polymers with predictable, well-defined structures. Living anionic polymerization provides one of the best methodologies for synthesizing complex macromolecular structures like α, ω-telechelic polymers. These macromolecules are obtained by different synthetic methods, which usually involve the titration of alkyllithiums over double diphenyl ethylene derivatives (DDPE). In this work we report the synthesis of α, ω-telechelic PDMS by employing a novel bifunctional initiator, obtained from a commercial available siloxane precursor, poly(dimethylsiloxane) diglycidylether terminated (PDMS-DGE). The synthetic strategy involves high-vacuum reaction of sec-Bu-Li+ with DPE, and subsequently with PDMS-DGE to promote the nuclephilic ring-opening ofthe epoxide ends. The resulting bifunctional initiator was then employed to polymerizehexamethly(cyclotrisiloxane) (D3) by using conventional anionic polymerization methods. Silane (-SiH), vinyl(-CH=CH2), hydroxyl (-OH), trimethyl and even methacryloyl ended PDMS were obtained. From SEC analysis,narrow molar masses distributions (Mw/Mn < 1.3) and good control over the resulting number-average molarmasses were observed. In addition, 1H-NMR and FTIR characterization confirmed the presence of the targetedfunctional groups in the resulting polymers.