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ABSTRACT:Copolymers of monomers 4-chloro-3-methyl phenyl methacrylate (CMPM) and methyl methacrylate (MMA) were synthesized with different monomer feed ratios using 2,2 0 -azobisisobutyronitrile (AIBN) as initiator in toluene at 70 C. The copolymers were characterized by IR-spectroscopy and their compositions were determined by ultraviolet (UV) and 1 H NMR spectroscopy. The linearization method of Fineman-Ross and Kelen-Tudos were employed to calculate the monomer reactivity ratio. Average molecular weight and polydispersity index were obtained by gel permeation chromatography (GPC). Thermogravimetric analysis (TGA and DTA) of copolymers were carried out under a nitrogen atmosphere. Antimicrobial effects of the homo and copolymers were also investigated for various microorganisms such as bacteria, fungi and yeast.

Friedel-Crafts polyetherketones were prepared from o-chlorophenol, 1,4-phenylenedioxy diacetylchloride (1,4-PDC), chloroacetyl chloride (CAC), 1,2-dichloroethane (DCE), and dichloromethane (DCM) using anhydrous aluminium chloride (AlCl 3 ) as catalyst and carbon disulfide (CS 2 ) as solvent. These resins were characterized by IR spectroscopy and gel permeation chromatography. Carius method was employed to obtain the percentage of chlorine content in the resins. The kinetic parameters for the thermal behavior of the resins were evaluated from thermogravimetry (TG) using Broido method. Differential scanning calorimetry (DSC) thermograms of these resins were also obtained. All the polyetherketones were tested for their antimicrobial properties against bacteria, fungi, and yeast. It was observed that most of the polyetherketones synthesized could be used as antibacterial and antifungal agents.

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4-Chloro-3-methylphenyl methacrylate (CMPM) and 2,4-dichlorophenyl methacrylate (2,4-DMA) were synthesized by reacting methacryloyl chloride with 4-chloro-3-methylphenol (CMP) and 2,4-dichlorophenol (2,4-DP), respectively. Homo and copolymers of CMPM and 2,4-DMA were obtained from different monomer feed ratios, using 2,2Ј-azobisisobutyronitrile as initiator in toluene at 70°C. IR-spectroscopy was employed to characterize the resulting homo and copolymers. Copolymer compositions were determined by ultraviolet (UV) spectroscopy. Fineman-Ross method was used to calculate the reactivity ratios of the monomers. Average molecular weight and polydispersity index were obtained by gel permeation chromatography (GPC). Thermogravimetric analyses (TGA) and differential thermal analysis (DTA) of copolymers were carried out under a nitrogen atmosphere. Antimicrobial effects of the homo and copolymers were also investigated for various microorganisms such as bacteria, fungi, and yeast.