Ring-Opening Polymerization of ε-Caprolactone Using Novel Tin(II) Alkoxide Initiators

Abstract:

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Two novel tin(II) alkoxides, namely: tin(II) hexoxide, Sn(OC6H13)2, and tin(II) octoxide, Sn(OC8H17)2, have been synthesized for use as coordination-insertion initiators in the bulk ring-opening polymerization of ε-caprolactone. The kinetics of the polymerization reactions were studied at 140 °C by dilatometry. It was found that both alkoxides were slow to dissolve in the ε-caprolactone monomer due to their molecular aggregation in the solid state. As a result, the slow solubilization of the initiators gave rise to deviations from the expected first-order kinetics. Instead, the kinetic results adhered more closely to zero-order kinetics with apparent zero-order rate constants k0 of 6.58 x 10-2 and 4.63 x 10-2 mol l-1 min-1 for the hexoxide and octoxide respectively

Info:

Periodical:

Advanced Materials Research (Volumes 55-57)

Main Theme:

Edited by:

Tawee Tunkasiri

Pages:

757-760

DOI:

10.4028/www.scientific.net/AMR.55-57.757

Citation:

A. Kleawkla et al., "Ring-Opening Polymerization of ε-Caprolactone Using Novel Tin(II) Alkoxide Initiators ", Advanced Materials Research, Vols. 55-57, pp. 757-760, 2008

Online since:

August 2008

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Price:

$35.00

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