Saccharide Polymers 6

Abstract

Summary: The 2,4,6‐tri‐O‐acetyl‐3‐deoxy‐D‐erythro‐hex‐2‐enono‐1,5‐lactone, briefly Ac‐Gluc‐enlactone (GEL) (1), is easily synthesized in an one‐step reaction from glucono‐δ‐lactone with good yields. Free radical polymerizations of GEL with vinyl esters with side chain of different length including fatty acids esters were carried out in substance or in solution under various conditions. The structures and chemical compositions of the polymers were established by elemental analysis, FT‐IR‐, 1H‐, and 13C NMR spectroscopy. Copolymerization kinetics were investigated. Characteristic properties of polymers, e.g. molecular weight, optical rotation, and thermal properties are reported. The products are of interest as components in commodities with binding and adhesive properties. magnified image

Reactivity of Vinyl Ethers and Vinyl Ribosides in UV-Initiated Free Radical Copolymerization with Acceptor Monomers

“…Accordingly, unsaturations can be formed by elimination reactions achievable at numerous positions of common carbohydrates . A series of papers exemplifies this type of approach where the polymerizable double bonds were generated in the exo- or endocyclic position of the pyranoid or furanoid structure of the monosaccharide. − The reactivity of the resulting monomers has been investigated in free radical polymerization with various conventional vinylic and acrylic comonomers. On the whole, conventional free radical polymerization proceeds with rather low overall yields for all studied monomers.…”