Cited by 174Polymer crystallization and propertiesbiodegradable polymer synthesis and propertiesBlock Copolymer Self-Assembly

Nucleation and Crystallization in Double Crystalline Poly(p-dioxanone)-b-poly(ε-caprolactone) Diblock Copolymers

Albuerne, J., Márquez, L., Müller, A. J., Raquez, J. M., Degée, Ph., Dubois, Ph., Castelletto, V., Hamley, I. W.·2003·Macromolecules

Abstract

The crystallization behavior of three double crystalline diblock copolymers containing poly(ε-caprolactone) and poly( p -dioxanone) has been studied via differential scanning calorimetry (DSC), polarized optical microscopy (POM), and wide-angle X-ray scattering (WAXS). Crystallization and melting temperatures and enthalpies are compared among copolymers and to those of the corresponding homopolymers. Only one crystallization exotherm was observed for the diblocks. DSC and WAXS indicated that during isothermal crystallization PPDX crystallized first, followed by PCL. POM revealed a transformation of crystalline morphologies at around 50 °C, from granular aggregates at high temperature (where only PPDX is crystalline) to banded spherulites at lower temperature, where both blocks were crystalline. The kinetics of crystallization were studied in detail via spherulite growth rates obtained from POM, and it was found that PPDX crystallization in the diblocks occurred much more slowly than in the homopolymers, this being responsible for the observed coincident crystallization of the two blocks during DSC cooling scans. On the other hand, the crystallized PPDX acts to nucleate the PCL block, so that heterogeneous crystallization was always observed even in copolymers containing a minority of this component (23%), for which “confined” crystallization might be expected. The crystallization kinetics of the PCL in the copolymers is accelerated by the presence of the crystalline PPDX block.

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Crossref · 10.1021/ma025766t

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Authors
Albuerne, J., Márquez, L., Müller, A. J., Raquez, J. M., Degée, P., Dubois, P., Castelletto, V., & Hamley, I. W.
Affiliations
University of Leeds (GB)
Venue
Macromolecules
Published
2003-02-06
Volume
36
Issue
5
Pages
1633-1644
ISSN
  • 0024-9297 (ISSN-L)
  • 1520-5835
OpenAlex
W2067778928
Cited by
174
References
33
Citations by year
2025: 2 · 2024: 1 · 2023: 1 · 2022: 2 · 2021: 4 · 2020: 5 · 2019: 6 · 2018: 4 · 2017: 10 · 2016: 8 · 2015: 9 · 2014: 15 · 2013: 10 · 2012: 12
FWCI
12.36
Type
journal article
Language
en
Open access
closed
Locations
  • Macromolecules (publishedVersion)
  • PolyPublie (École Polytechnique de Montréal) (submittedVersion)
Topics
  • Physical Sciences › Materials Science › Polymers and Plastics › Polymer crystallization and properties
  • Physical Sciences › Materials Science › Biomaterials › biodegradable polymer synthesis and properties
  • Physical Sciences › Materials Science › Materials Chemistry › Block Copolymer Self-Assembly
Keywords
poly(p-dioxanone), polycaprolactone, diblock copolymers, nucleation, crystallization kinetics, spherulite growth, heterogeneous crystallization, confined crystallization, crystallization exotherm, crystal morphology, crystallization enthalpy

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