Some films obtained from poly(ε-caprolactam) (polyamide 6) and its copolymers with laurolactam (copolyamides 6/12) were submitted to thermal treatment. The most versatile method for characterization of polyamide and its copolymers, i.e., FT-IR spectroscopy, was chosen as a tool in order to determine the possible changes in the structures of polymers. It was observed that the polymers films showed Brill transition during heating.
Rusu, E., Rusu, G., & Dorohoi, D.-O. (2022). Thermal influence on structure of polymers with ε-caprolactam units studied by FT-IR spectroscopy. Polimery, 54(5), 347–353. Retrieved from https://ichp.vot.pl/index.php/p/article/view/1208