Accessibility navigation


The structure of crystallisable copolymers of L-lactide, epsilon-caprolactone and glycolide

Channuan, W., Siripitayananon, J., Molloy, R., Sriyai, M., Davis, F. J. and Mitchell, G. R. (2005) The structure of crystallisable copolymers of L-lactide, epsilon-caprolactone and glycolide. Polymer, 46 (17). pp. 6411-6428. ISSN 0032-3861

Full text not archived in this repository.

It is advisable to refer to the publisher's version if you intend to cite from this work. See Guidance on citing.

To link to this item DOI: 10.1016/j.polymer.2005.04.097

Abstract/Summary

We apply a new X-ray scattering approach to the study of melt-spun filaments of tri-block and random terpolymers prepared from lactide, caprolactone and glycolide. Both terpolymers contain random sequences, in both cases the overall fraction of lactide units is similar to 0.7 and C-13 and H-1 NMR shows the lactide sequence length to be similar to 9-10. A novel representation of the X-ray fibre pattern as series of spherical harmonic functions considerably facilitates the comparison of the scattering from the minority crystalline phase with hot drawn fibres prepared from the poly(L-lactide) homopolymer. Although the fibres exhibit rather disordered structures we show that the crystal structure is equivalent to that displayed by poly(L-lactide) for both the block and random terpolymers. There are variations in the development of a two-phase structure which reflect the differences in the chain architectures. There is evidence that the random terpolymer includes non-lactide units in to the crystal interfaces to achieve a well defined two-phase structure. (c) 2005 Published by Elsevier Ltd.

Item Type:Article
Divisions:Faculty of Science > School of Mathematical, Physical and Computational Sciences
Faculty of Life Sciences > School of Chemistry, Food and Pharmacy > Department of Chemistry
Interdisciplinary centres and themes > Chemical Analysis Facility (CAF) > Electron Microscopy Laboratory (CAF)
ID Code:5585
Uncontrolled Keywords:x-ray scattering, structure, orientation , COORDINATION POLYMERIZATION, POLY(L-LACTIDE), CRYSTALLIZATION, CONFORMATION, POLYLACTIDES, DEGRADATION, L,L-LACTIDE, TERPOLYMER, MORPHOLOGY, POLYMERS

University Staff: Request a correction | Centaur Editors: Update this record

Page navigation