• clay;
  • irradiation;
  • nanocomposites;
  • ring-opening polymerization


A rapid and “green” synthesis of poly(p-dioxanone) (PPDO)/montmorillonite (MMT) nanocomposites was carried out smoothly and effectively nder constant microwave powers of 30, 60, 90, and 120 W in a microwave oven at a frequency of 2.45 GHz. The temperature of polymerization was in the range 103–224°C. PPDO, with a viscosity-average molecular weight of 111,000 g/mol and a conversion of 85%, was obtained at 60 W for 10 min, in which the ratio of p-dioxanone to AlEt3 was 300/1 (mol/mol). The intercalated structure of PPDO/MMT nanocomposites was confirmed by X-ray diffraction and transmission electron microscopy. Thermogravimetry data showed that the thermal stability of the nanocomposites prepared under microwave irradiation was improved with respect to those prepared via conventional heating. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012