High-molecular weight polyesters were prepared via the ring-opening polymerization of cyclic oligomers which were produced by the condensation of diols and dicarboxylates by lipase in a diluted toluene solution. Thus, dimethyl fumarate, maleate and succinate with 1,6-hexanediol and 1,4-butanediol were reacted forming cyclic oligomers in diluted toluene solution by Candida antarctica lipase. The cyclic oligomer was readily polymerized by the same lipase in more concentrated solution to produce a high-molecular weight polyester. On the other hand, molecular weights of polyesters produced via the direct polycondensation of diols and dicarboxylates decreased considerably when compared to those produced by the ring-opening polymerization of cyclic oligomers.
|出版ステータス||Published - 2005 12月 1|
|イベント||54th SPSJ Symposium on Macromolecules - Yamagata, Japan|
継続期間: 2005 9月 20 → 2005 9月 22
|Other||54th SPSJ Symposium on Macromolecules|
|Period||05/9/20 → 05/9/22|
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