Dry synthesis of polyaspartic acid under microwave irradiation and its fouling inhibition performance

The microwave power was studied as a new heating means for the synthesis of polyaspartic acid from maleic anhydride and ammonium acid carbonate.Effects of reactant mole ratio,the microwave power and irradiation time on the reaction were investigated.The best conditions were given as follows:The ratio between maleic anhydride and ammonium acid carbonate was 1∶1.2,the output power of the 2 450 MHz microwave was 900 W,and the irradiation time was 15 min.Its fouling inhibition performance against calcium carbonate was as good as the polymer synthesized by conventional condensation polymerization.