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Tuning thermal properties and microphase separation in aliphatic polyester ABA copolymers

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MacDonald, J. P. , Parker, M. P., Greenland, B. W., Hermida-Merino, D., Hamley, I. W. and Shaver, M. P. (2015) Tuning thermal properties and microphase separation in aliphatic polyester ABA copolymers. Polymer Chemistry, 6 (9). pp. 1445-1453. ISSN 1759-9954

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To link to this item DOI: 10.1039/c4py01459f

Abstract/Summary

Four alkyl substituted β-lactones were investigated as monomers in ring opening polymerisation to produce a family of poly(3-hydroxyalkanoate)s. Homopolymers were synthesised using a robust aluminium salen catalyst, resulting in polymers with low dispersity (Đ < 1.1) and predictable molecular weights. ABA triblock copolymers were prepared using poly(L-lactic acid) as the A block and the aforementioned poly(3-hydroxyalkanoate) as the B block via a sequential addition method. Characterisation of these copolymers determined they were well controlled with low dispersities and predictable molecular weight. DSC analysis determined copolymers prepared from β-butyrolactone or β-valerolactone yielded polymers with tunable and predictable thermal properties. Copolymers prepared from β-heptanolactone yielded a microphase separated material as indicated by SAXS, with two distinct Tgs. The polymers could be readily cast into flexible films and their improved tensile properties were explored.

Item Type:Article
Refereed:Yes
Divisions:Interdisciplinary centres and themes > Chemical Analysis Facility (CAF)
Faculty of Life Sciences > School of Chemistry, Food and Pharmacy > Department of Chemistry
Faculty of Life Sciences > School of Chemistry, Food and Pharmacy > School of Pharmacy > Medicinal Chemistry Research Group
ID Code:39328
Publisher:Royal Society of Chemistry

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