Preparation and characterization of nylon 6,5 copolymers from -εCaprolactam and 2-piperidone

Hye Young Kim, Jin Seon Goh, Mi Hee Ryu, Dae Su Kim, Bong Keun Song, Seung Hwan Lee, Si Jae Park, Jonggeon Jegal

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7 Scopus citations


To prepare biomass based nylon 6,5 copolymers, f-caprolactam and 2-piperidone, the monomers of nylon 6,5 copolymers, were synthesized respectively from lysine and 5-aminovaleric acid which were produced from glucose by the fermentation process. The copolymers were then polymerized by the anionic ring opening polymerization of them at 40 °C, using potassium tert-butoxide as a catalyst and acetyl-2-caprolactam and carbon dioxide as initiators. The prepared copolymers were characterized with various analytical methods: their viscosity molecular weight (Mn) was as high as 30000 g/mol and polymerization yield was over 50%, and it was found that they were semi-crystalline polymers having melting point at 165 °C which was much lower than its thermal degradation point, 250 °C. These polymers were expected to have good thermal processability and application fields.

Original languageEnglish
Pages (from-to)31-37
Number of pages7
JournalPolymer (Korea)
Issue number1
StatePublished - Jan 2014


  • Biomass-based polymer
  • Bioplastic
  • Nylon 6 5 copolymer
  • Ring-opening polymerization


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