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- W2920787722 abstract "The phosphoric acid group was introduced into the poly(vinyl alcohol) (PVA) and ethylene/vinyl alcohol copolymers (EVA) structures via H3PO4/urea and POCl3/pyridine systems. The structure of phosphorylated polymers was characterized by 1H and 31P {1H} NMR and pH titration analyses. It was found that H3PO4/urea system leads to formation of soluble phosphorylated polymers with a low degree of phosphorylation (DP) or insoluble phosphorylated polymers with a high DP while POCl3/pyridine system results in the crosslinked structure. Then, an efficient and straightforward method for the introduction of pendant diemethyl phosphate groups into EVA via reaction with in situ synthesized dimethyl iodoophosphate was proposed. Resulting polymers were characterized by 1H and 31P {1H} NMR spectroscopies. The phosphorylated polymers with high DP and without any crosslinked structure were achieved. To remove one or both methyl groups, the phosphate groups were subsequently (mono)-dealkylated using NaI and ClSi(Me)3/NaI, respectively." @default.
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- W2920787722 date "2019-04-01" @default.
- W2920787722 modified "2023-09-26" @default.
- W2920787722 title "An efficient method for straightforward phosphorylation of ethylene/vinyl alcohol copolymers using trialkyl phosphite/iodine" @default.
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- W2920787722 doi "https://doi.org/10.1016/j.polymer.2019.02.050" @default.
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