**6. Results and discussion**

Under conventional conditions (CS), the polymer was produced with 75% yield after 5 h, if the reaction was continued the yield was 87.6% after 24 h at ambient temperature. By contrast, under microwave irradiation the material was produced with the remarkable yield 80.56% after only 2 min after the beginning of the reaction, and 92.58% after 20 min at ambient temperature.
