Adenine functionalized antibacterial <scp>PVC</scp> with both photo and thermal stability
Reham A. Abdel‐Monem, Ahmed A. El‐Sayed, Ahmed E. Abdelhamid, Samira T. Rabie
Abstract
Abstract Adenine was used as a precursor to obtain antibacterial poly(vinyl chloride) (PVC). Adenine functionalized PVC has been prepared, characterized, and its antibacterial activity was evaluated. Chemical modification reaction of PVC was performed with adenine in two molar ratios (2:1 and 4:1). Fourier‐transform infrared spectroscopy and 1 HNMR spectroscopic analyses confirmed the chemical structure of the adenine‐modified PVC and indicated the incorporation of adenine molecule in the backbone chains of PVC. Photostability of the prepared modified PVC was determined by measuring the changes in molecular weights using Gel permeation chromatography technique as well as the extent of discoloration of UV irradiated samples while thermal stability was studied by measuring the rate of dehydrochlorination and thermogravimetric analysis. Morphological investigation in terms of scanning electron microscopy was studied. Antibacterial activities of the two modified PVC samples were investigated against two types of Gram‐positive bacterial strains ( Bacillus subtitles , Staphylococcus aurous , and Streptococcus faecalis ) while the other types ( Escherichia coli , Neisseria gonorrhea , and Pseudomonas aeruginosa ) represented the Gram‐negative type bacteria. Antibacterial activity of PVC‐adenine blend was also investigated for comparison. Minimum inhibition concentration was performed for some PVC samples under study.