Phase separation in poly(butylene terephthalate)-based materials prepared by solid-state modification

作者：Gubbels Erik; Jasinska Walc Lidia; Hermida Merino Daniel; Hansen Michael Ryan; Noordover Bart^*; Spoelstra Anne; Goossens Han; Koning Cor

来源：Polymer, 2014, 55(16): 3801-3810.

DOI：10.1016/j.polymer.2014.05.051

• Poly(butylene terephthalate)
• Solid-state modification
• Phase-separated morphology

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.

• 出版日期2014-8-5