This study involves the copolymerization of caprolactam with ethylene carbonate (EC) and polycarbonate diols (PCDL) to produce green polymer materials containing carbon dioxide, demonstrating environmental friendliness. The synthesized products were characterized using FT-IR, XRD, TGA, DSC, DMA, contact angle, and water absorption tests to identify their structure and stability. The study found that the stretching oscillation absorption peak of N-C=O has indicated the addition of EC, and the stretching vibration of the C-H group has indicated the addition of PCDL, which further confirmed that polyamide 6 has been successfully synthesized with EC and PCDL; EC and PCDL are more heat-resistant If it is poor, the cracking point will be lowered and the appearance will be yellowish. XRD analysis confirms that a high EC ratio induces an amorphous structure, while a high PCDL ratio has no significant effect on crystallization. DSC analysis demonstrates that the addition of EC and PCDL both decreases crystallinity and lowers the melting point, with varying trends in enthalpy depending on the ratio of additives. DMA analysis confirms that the addition of EC and PCDL both lowers the Tg point. Increasing EC content decreases contact angle and increases water absorption, while increasing PCDL content increases contact angle and reduces water absorption.
