Summary
Polyimides (PI) having different molecular weights were prepared by condensation of oxydiphthalic anhydride with 9,9-bis-(4-aminophenyl)fluorene in nitrobenzene solution at 180°C. These polyimides carried two amino chain ends which allowed us to fix polycaprolactam chains (PA6) to obtain PA6-PI-PA6 type copolymers. The elemental analysis and infrared spectroscopic determination gave the proportion of PA6 (or PI) in the copolymers. The studies of thermal properties-DSC and TGA-allowed us to characterize the copolymers.
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Carrière, F.J., Sekiguchi, H., Surin, N.N. et al. Synthesis and thermal properties of polyamide 6 (A)-polyimide (B) block copolymers of ABA type. Polymer Bulletin 35, 441–448 (1995). https://doi.org/10.1007/BF00297610
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DOI: https://doi.org/10.1007/BF00297610