精密重合・精密合成高分子Ｉ　　ビスフェノールＡ型大環状カーボナートオリゴマーの開環重合

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タイトル別名
  • Precision Polymerization and Polymers I. Ring-Opening Polymerization of Bisphenol-A Type Macrocyclic Oligocarbonate.
  • ビスフェノール Aガタ ダイカンジョウ カーボナート オリゴマー ノ カイカン

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Thermal polymerization of isolated bisphenol-A type macrocyclic oligocarbonates (dimer, trimer, tetramer, and pentamer) was carried out. Iu the cases of dimer and trimer, complete conversion to the corresponding linear polycarbonate was obtained at 300°C, in 20 and 40min, respectively. However, a small part of the tetramer still remained even after heating at 300°C for 40min. Although the pentamer exhibited much lower reactivity than 2-4 cyclic oligomers, its conversion was drastically improved by the presence of the dimer. The low reactivity of pentamer may be due to slow ionization of the bigger ring. The polymers obtained from trimer and tetramer had higher molecular weights (Mw>800000) than those obtained from dimer and pentamer.

収録刊行物

  • 高分子論文集

    高分子論文集 54 (10), 749-753, 1997

    公益社団法人 高分子学会

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