Phase separation in poly(butylene terephthalate)-based materials prepared by solid-state modification |
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| Authors: | Erik Gubbels Lidia Jasinska-Walc Daniel Hermida-Merino Michael Ryan Hansen Bart Noordover Anne Spoelstra Han Goossens Cor Koning |
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| Affiliation: | 1. Laboratory of Polymer Materials, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands;2. Department of Polymer Technology, Chemical Faculty, Gdansk University of Technology, G. Narutowicza Str. 11/12, 80-952 Gdansk, Poland;3. Netherlands Organization for Scientific Research (NWO), DUBBLE beamline at the ESRF, 6 rue Jules Horowitz, BP 220, 38043 CEDEX 9 Grenoble, France;4. Dutch Polymer Institute DPI, P.O. Box 902, Eindhoven 5600 AX, The Netherlands;5. Max Planck Institute for Polymer Research, Ackermannweg 10, D-55128 Mainz, Germany;6. Interdisciplinary Nanoscience Center (iNANO) and Department of Chemistry, Aarhus University, Gustav Wieds Vej 14, DK-8000 Aarhus C, Denmark;g DSM Coating Resins, Ceintuurbaan 5, Zwolle, The Netherlands |
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| Abstract: | The morphology of a series of poly(butylene terephthalate) (PBT)/fatty acid dimer diol (FADD)-based copolyesters prepared by solid-state modification (SSM) was studied. It was shown that in copolyesters containing less than 10 wt% FADD two different phases, i.e. a PBT crystalline phase and a PBT-rich amorphous phase, are present. The FADD residues were more or less homogeneously distributed throughout the interlamellar regions. For copolymers containing more than 10 wt% of FADD, a three-phase morphological model has to be used due to phase separation of a FADD-rich amorphous phase from the PBT-rich matrix, as confirmed by solid-state nuclear magnetic resonance spectroscopy and transmission electron microscopy. The final morphology was dependent on the morphology of the PBT/FADD-based physical mixtures prior to SSM. In addition, it was shown that FADD diffusion during SSM influences the final morphology. |
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| Keywords: | Poly(butylene terephthalate) Solid-state modification Phase-separated morphology |
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