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Development and evaluation of Artemisia vulgaris mucilage based polymeric network for controlled drug delivery.

The present study was conducted to fabricate and compare pH-sensitive polymeric networks of Artemisia vulgaris- Methacrylic acid using free radical polymerization conventional method and microwave-assisted method. Potassium persulphate and N' N'- Methylene bisacrylamide were employed as an initiator-crosslinker system. Swelling studies were performed at pH 1.2, 4.5, 6.8 and 7.4. Concentrations of polymer and monomer along with radiation dose were optimized as a function of swelling. Porosity and gel fraction were calculated for all samples. FTIR study confirmed the formation of cross-linked networks. Results of SEM indicated that the microwave irradiated polymeric network had a more porous structure. DSC and XRD study indicated the entrapment of drug inside the polymeric networks in amorphous form. In comparison to the conventional method, the polymeric network prepared by the microwave-assisted method exhibited high swelling ratios, porosity, thermal stability and drug release. These results signify microwave radiations as an effective alternative to the conventional heating method.