Authors: Momen S A Abdelaty
Publish Date: 2017/03/06
Volume: 26, Issue: 2, Pages: 636-646
Abstract
The study aims to synthetize a new functional acrylate monomer from vanillin in one step reaction The new monomer has called by vanillin acrylate and abbreviated VA It was confirmed by chemical methods 1H NMR 13C IR and UV indicated logic results The homopolymer has been prepared by free radical polymerization and characterized chemically and physically the 1HNMR and IR have proofed the presence of aldehyde group in the polymer main chain This monomer was used to synthesize three different molar concentrations of temperature responsive functional polymers with Nisopropylacrylamide via free radical polymerization by AIBN in solution The 1H NMR was used for determination of actual mole concentration of each monomer The aldehyde group in polymers were used as a linker for grafting with primary amine compounds by click reactions to form Schiff’s base imine compounds The grafted copolymers were also investigated by 1H NMR and IR for structure elucidation Gel permeation chromatography GPC was used for determination the molecular weight and polydispersity DSC for glass temperature of solid polymers XRD for crystallinity UV–Vis Spectroscopy was used for the determination of phase separation or the lower critical solution temperature Tc of polymers solution before and after grafting not only in deionized water but in pH 5 and pH 11
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