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- W2033379326 abstract "Polycaprolactone (PCL) grafting on vinyl alcohol-co-vinyl acetate) (PVA-Ac), was investigated in the melt at high temperature (170°C), below the PVA-Ac melting point, by ring opening polymerization of ϵ-caprolactone initiated by metal alkoxyde sites present in PVA-Ac: no additional initiator was used. The obtained average structures were determined by 1H NMR. As expected, small grafts, with low average polymerization degree (DP), were obtained, between 4 and 12 h of reaction. These DP are due to exchange reactions between hydroxyl groups and PCL growing chains. The PVA-Ac was shown to be partially substituted by short PCL grafts. The DP linearly increased with the initial Lactone/PVA-Ac ratio, and the substituted alcohol sites rate were limited to 63%.It was shown that the used reactive system is characterized by a quazi-living polymerization mechanism. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2007" @default.
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- W2033379326 date "2007-01-01" @default.
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- W2033379326 title "ε-caprolactone grafting on a poly(vinyl alcohol-co-vinyl acetate) in the melt without added initiator" @default.
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- W2033379326 doi "https://doi.org/10.1002/app.26400" @default.
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