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Comonomer Partition of PA6T/66 Random Copolymers Induced by Coupled Temperature and Pressure Fields
Ji-Zeng Huang1,2, Xin-Tong Yuan1,2, Zheng-Yuan Chen1,2
1State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, P. R. China.
Macromolecular rapid communications
|February 4, 2026
Resumen
Semi-aromatic polyamide PA6T/66 exhibits pseudo-eutectic behavior under combined temperature and pressure. This study reveals how its structure evolves, offering strategies to enhance copolymer performance.
Área de la Ciencia:
- Materials Science; Polymer Science; Crystallography
Sus antecedentes:
- Semi-aromatic polyamide PA6T/66 is valued for thermal stability and low moisture absorption.; Its eutectic behavior under melt processing conditions (temperature and pressure) is not well understood.
Objetivo del estudio:
- To investigate the crystallization and melting behavior of PA6T/66 under coupled temperature-pressure fields.; To elucidate the underlying structural evolution and pseudo-eutectic mechanisms.
Principales métodos:
- Differential scanning calorimetry (DSC) was used to analyze thermal transitions.; In situ wide-angle X-ray scattering (WAXS) and small-angle X-ray scattering (SAXS) probed structural changes.
Principales resultados:
- Unexpected multi-stage melting was observed, indicating comonomer partition within cocrystal domains.; Cocrystal formation occurred in stages, with different compositions of 6T repeat units forming at varying temperatures under applied fields.; Evidence of pseudo-eutectic behavior was established.
Conclusiones:
- The study clarifies the structure evolution of PA6T/66 under coupled temperature-pressure fields.; Findings provide a strategy for improving the performance of semi-aromatic polyamide copolymers through controlled cocrystallization.
Palabras clave:
X‐ray diffractioneutectic behaviorsemi‐aromatic polyamidestemperature‐pressure fieldsMás Videos Relacionados
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