Melt/solid polycondensation of glycolic acid to obtain high-molecular- weight poly(glycolic acid)

K. Takahashi, I. Taniguchi, M. Miyamoto, Y. Kimura

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Bulk polycondensation of glycolic acid (GA) was studied to obtain high- molecular-weight poly(glycolic acid) (PGA). At first, a solid oligocondensate was prepared by melt-polycondensation of GA at 190°C, and then it was subjected to solid-state polycondensation at the same temperature to increase the molecular weight. After the catalyst screening, zinc acetate dihydrate was discovered to be the best catalyst. The weight-average molecular weight of PGA reached 91,000, which was at the same level with that of PGA prepared by the conventional ring-opening polymerization of glycolide. This process can afford a facile route to large-scale synthesis of PGA. (C) 2000 Elsevier Science Ltd.

Original languageEnglish
Pages (from-to)8725-8728
Number of pages4
Issue number24
Publication statusPublished - Nov 2000
Externally publishedYes


All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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