Development and Applications of Novel Acrylic Copolymers

Abstract

The monomer 2,4-dichlorophenylacrylate was synthesized from 2,4-dichlorophenol and characterized by conventional methods. Homo-and copolymers of 2,4-dichlorophenylacrylate and butylmethacrylate were synthesized with different feed ratios using N,N-dimethylformamide as a solvent and 2,2 0 -azobisisobutyronitrile (AIBN) as an initiator at 70 C. The resulting polymers were characterized by infrared spectroscopy. Copolymer compositions were determined by ultraviolet (UV) spectroscopy. The monomer reactivity ratios were determined by applying the conventional linearization method of Fineman-Ross and Kelen-Tudos. The reactivity ratios values of 2,4-dichlorophenylacrylate and butylmethacrylate obtained from F-R plot are 0.91 and 1.15 respectively and from K-T plot, 0.97 and 1.24 respectively. The molecular weight and polydispersity of copolymers were determined by gel permeation chromatography (GPC). Thermo gravimetric analyses of the polymers were carried out in a nitrogen atmosphere. Thermal data suggest that the polymers underwent double decomposition. Homo and copolymers were tested for their antimicrobial properties against various microorganisms and showed strong inhibitory effects.

Antibacterial activity and the hydrophobicity of cotton coated with hexadecyltrimethoxysilane

“…Silver nanoparticles kill bacteria via the process of diffusion [25]. Research on antibacterial silver nanoparticles were also performed by Patel et al [26] which reported that the antibacterial properties of nanoparticles were associated with its small size, large surface area to make interaction with the higher microbial membrane. Oxygen of -OH in the cotton cloth bound to the silver will bind to sulfihidril (-S-H) on the cell membrane to form a bond R-S-S-R and produce SAg clusters that cause lethal inhibition of cell respiration.…”