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To prepare biomass based nylon 6,5 copolymers, e-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 (Mη) 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.

Preparation and Characterization of Nylon 6,5 Copolymers from ε-Caprolactam and 2-Piperidone