The Open UniversitySkip to content
 

Crystallization of hydroxybutyrate oligomers: 1. morphology and folding

Li, J.; Organ, Sally; Hobbs, J.K.; Terry, A.E.; Barham, P.J. and Seebach, D. (2004). Crystallization of hydroxybutyrate oligomers: 1. morphology and folding. Polymer, 45(26) pp. 8913–8923.

DOI (Digital Object Identifier) Link: http://dx.doi.org/10.1016/j.polymer.2004.10.034
Google Scholar: Look up in Google Scholar

Abstract

Exact length hydroxybutyrate oligomers containing 24 and 32 repeat units have been prepared and their crystallization behaviour and crystal morphology observed.
The oligomers form crystals from dilute solution and from the melt that have similar overall morphologies to crystals of the polymer, poly(hydroxybutyrate). Electron diffraction indicates that the chains are closely perpendicular to the basal planes of the crystals.
Wide angle X-ray diffraction suggests that all crystals, no matter what their thickness, have a high degree of crystallinity and the same crystal structure.
The crystals have a range of thicknesses, as measured by small angle X-ray diffraction. The most common thicknesses correspond to the extended stem length and to one half or, surprisingly, two thirds of that value. A model is proposed for the non-integer fraction crystals in which half of the chain ends are incorporated in the crystals themselves.

Item Type: Journal Article
Copyright Holders: 2004 Elsevier Ltd.
ISSN: 0032-3861
Keywords: hydroxybutyrate oligomers; crystallization; morphology
Academic Unit/Department: Mathematics, Computing and Technology > Engineering & Innovation
Item ID: 2437
Depositing User: Sally Organ
Date Deposited: 13 Jun 2006
Last Modified: 27 Jun 2011 16:02
URI: http://oro.open.ac.uk/id/eprint/2437
Share this page:

Altmetrics

Scopus Citations

Actions (login may be required)

View Item
Report issue / request change

Policies | Disclaimer

© The Open University   + 44 (0)870 333 4340   general-enquiries@open.ac.uk