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Keywords:

  • biodegradable;
  • cationic polymerization;
  • polyesters;
  • ring-opening polymerization;
  • self-organization;
  • supramolecular structures
Thumbnail image of graphical abstract

The aggregation of poly(ε-caprolactone) containing different number of carboxyl groups at one chain end in the presence of Ca2+ cations was investigated by viscosity measurements. With increasing number of carboxyl groups, aggregation is strongly enhanced as evidenced by the viscosity-time profiles. The formation of long cylindrical structures was observed by scanning electron microscopy.