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- W1567207614 abstract "Poly(trans-3,4-dihydroxytetrahydropyran-6,2-diyloxymethylene) (4), a new polysaccharide-type polymer containing two hydroxyl groups in its repeating unit, was prepared from poly(5,6-dihydro-2H-pyran-6,2-diyloxymethylene) (2) which was obtained by the ring-opening polymerization of 6,8-dioxabicyclo[3.2.1]oct-3-ene (1): The unsaturated polymer 2 was epoxidized with m-chloroperbenzoic acid in methylene chloride or with hydrogen peroxide-benzonitrile in a mixed solvent of methanol and chloroform, and the resultant polymer was then hydrolyzed with potassium hydroxide in aqueous, 1,4-dioxane under moderate conditions. The hydrolyzed polymer 4 was characterized by elemental analysis, periodate oxidation, 1H NMR and IR spectroscopy. Water sorption of 4 was measured at various humidities at 20°C and compared with those of related polymers. The water sorption isotherm of 4 showed a marked resemblance to that of natural dextran which has an identical backbone structure but three hydroxyl groups per repeating unit." @default.
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- W1567207614 date "1978-04-01" @default.
- W1567207614 modified "2023-09-25" @default.
- W1567207614 doi "https://doi.org/10.1002/macp.1978.021790409" @default.
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