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- W2023111527 abstract "Abstract Random and block copolymerizations of 1,5-dioxepan-2-one (DXO) with l -, d -, or d , l -lactide (LA) were performed with Sn(oct)2 as an initiator in order to prepare novel type of biodegradable copolymers. The degradation of random copolymers, poly(DXO-ran- d , l -LA) with a compost were slightly higher than that of the corresponding poly(DXO-ran- l -LA). When the degradation of block copolymers, poly(DXO)-block-poly( d , l -LA or l -LA), were compared with those of poly(DXO-ran- d , l -LA or l -LA), the former copolymer showed less degradability. The enzymatic degradability using proteinase K is much higher than the degradation with a compost. Poly(DXO-ran- d , l -LA) showed large degradability compared with poly(DXO-ran- l -LA), while poly(DXO)-block-poly( d , l -LA or l -LA) indicates less degradability with proteinase K. In sharp contrast to l -LA or d , l -LA copolymers, poly(DXO-co- d -LA)s are inert toward the decomposition with proteinase K, while these polymers show better degradability using a compost. Triblock copolymers, poly(DXO/ l -LA/DXO)s showed extremely high enzymatic degradation compared with poly( l -LA/DXO/ l -LA)s because of the large hydrophilicity of the former copolymers. Random copolymerization of DXO/ l -LA/3-allyl-δ-valerolactone (3-AV) gave a interesting biodegradable copolymer, which can be modified into biodegradable graft polymer by further copolymerization with styrene." @default.
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- W2023111527 date "2004-06-01" @default.
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- W2023111527 title "Syntheses of random and block copolymers of lactides with 1,5-dioxepan-2-one and their biodegradability" @default.
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- W2023111527 doi "https://doi.org/10.1016/j.reactfunctpolym.2004.02.001" @default.
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