Kinetic and thermodynamic considerations in the synthesis of a new three‐arm poly(ε‐caprolactone) | Zendy

Balakrishnan Sunder | Zendy; Krishnan Mohan | Zendy; Dubois Philippe | Zendy; Narayan Ramani | Zendy

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Kinetic and thermodynamic considerations in the synthesis of a new three‐arm poly(ε‐caprolactone)

Author(s) -

Balakrishnan Sunder,

Krishnan Mohan,

Dubois Philippe,

Narayan Ramani

Publication year - 2004

Publication title -

polymer engineering and science

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.503

H-Index - 111

eISSN - 1548-2634

pISSN - 0032-3888

DOI - 10.1002/pen.20145

Subject(s) - monomer , caprolactone , materials science , polymerization , alkoxide , polymer chemistry , polymer , polyester , kinetics , ring opening polymerization , chemical engineering , catalysis , chemistry , composite material , organic chemistry , physics , quantum mechanics , engineering

A new high‐molecular‐weight three‐arm poly(ε‐caprolactone) (PCL) polymer was synthesized in bulk (in the absence of any solvent) by using aluminum tri‐sec butoxide as a tri‐functional initiator. The ring‐opening polymerization of ε‐caprolactone occurs via a coordination‐insertion mechanism that links three growing polyester chains to the Al central atom via metal alkoxide bonds. The global kinetics of the bulk polymerization was determined, and a kinetic model based on monomer‐polymer equilibrium was developed to predict the fractional extent of monomer conversion. Monomer conversions in excess of 95% to form high‐molecular‐weight PCL were achieved. Polym. Eng. Sci. 44:1491–1497, 2004. © 2004 Society of Plastics Engineers.

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