Synthesis and characterization of sugar-based methacrylates and their random copolymers by ATRP
Articles > Article · 2017
Authors: G. Acik, S. Yildiran, G. Kok, Y. Salman, M. A. Tasdelen
Express Polymer Letters, International, WoS, 2017, vol 11, pp 799-808
DOI: 10.3144/expresspolymlett.2017.76
Summary
Various sugar-based methacrylate monomers have been prepared and randomly copolymerized with methyl methacrylate (MMA) using classical atom transfer radical polymerization (ATRP).Firstly, four different sugar-based methacrylates are synthesized by two-step method: (i) etherification of protected monosaccharides with epichlorohydrin and (ii) following ring-opening reaction of obtained epoxides with methacrylic acid (MAA) in the presence of triethylamine.Next, these monomers are copolymerized with MMA via ATRP at 90 °C to obtain corresponding random copolymers.The molecular weights of the copolymers are determined by both GPC (gel permeation chromatography) and 1 H-NMR (nuclear magnetic resonance spectroscopy) analyses and found as 10 600~16 800 and 12 200~18 500 g/mol, respectively.Moreover, the copolymer compositions are also determined by 1 H-NMR analysis using characteristic signals of the monomers and found as about 94.1~97.8%,which are good agreement with feeding ratio.In addition, the glass transition temperatures of copolymers are found as 101.2~102.9°C by changing type and composition of sugar-based methacrylate monomers.Overall, a series of well-defined random copolymers comprising different sugar-based methacrylates and methyl methacrylates were successfully synthesized by classical ATRP method.