Morphology and growth of a hydroxybutyrate oligomer with 24 repeat units

SJ Organ, J Li, AE Terry, PJ Barham

Research output: Contribution to journalArticle (Academic Journal)peer-review

7 Citations (Scopus)

Abstract

The crystallization behaviour of an oligomer of hydroxybutyrate containing 24 repeat units has been studied over a wide range of temperature using optical microscopy to measure growth rates and observe morphologies and small angle X-ray scattering to measure crystal thicknesses. Crystals grew with a wide range of thicknesses between E/2 and E, where E is the extended chain length. Preferred crystal thicknesses corresponded to simple fractions of E, which result in a relatively higher proportion of chain folds in the surface. Growth rates peaked at 75 °C and were unusually scattered at temperatures corresponding to a change in preferred chain conformation. Spherulites grown at the lower temperatures were banded: as the crystallization temperature was increased the banding disappeared, the shapes of the spherulites became less regular, and a coarser texture associated with reduced branching developed.
Translated title of the contributionMorphology and growth of a hydroxybutyrate oligomer with 24 repeat units
Original languageEnglish
Pages (from-to)5513 - 5522
Number of pages10
JournalPolymer
Volume47 (15)
DOIs
Publication statusPublished - Jul 2006

Bibliographical note

Publisher: Elsevier Science B.V
Other: Special issue - Morphology of Crystalline Polymers: Dedicated to David Bassett on the Occasion of his Retirement

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