Bianchi Enrico, Soccio Michelina, Gazzano Massimo, Papadopoulos Lazaros, Robert Tobias, Bikiaris Dimitrios N, Lotti Nadia
Department of Civil, Chemical, Environmental and Materials Engineering, University of Bologna, Via Terracini 28, 40131 Bologna, Italy.
Interdepartmental Center for Industrial Research on Advanced Applications in Mechanical Engineering and Materials Technology, CIRI-MAM, Viale del Risorgimento 2, 40136 Bologna, Italy.
Polymers (Basel). 2024 Dec 11;16(24):3459. doi: 10.3390/polym16243459.
PEA 46 is a biobased polymer with promising properties for sustainable packaging applications, which can be obtained via polymerization of a furan 2,5-dicarboxylic acid (2,5-FDCA) derivative and a diol monomer containing internal amide bonds (46 amido diol). In the literature, PEA 46 showed a complex series of thermal transitions during DSC scans. For this reason, in this initial exploratory study PEA 46 was subjected to compression molding and the melting behavior of film samples was investigated with parallel DSC and WAXS analyses. At room temperature, a mesomorph phase was the only one observed. Subjecting the samples to heating scans led to the formation of phase α, caused by a sequence of partially overlapping melting and recrystallization phenomena. An additional melting and recrystallization phenomenon resulted in the development of a phase β, which melted at approximately 173 °C, the temperature after which the material was completely amorphous and isotropic. Phase α could be enhanced via thermal annealing, whereas phase β could be enhanced via a melt crystallization treatment.
聚醚酰胺46是一种具有生物基的聚合物，在可持续包装应用方面具有良好的性能，它可通过呋喃2,5 - 二羧酸（2,5 - FDCA）衍生物与含内酰胺键的二醇单体（46酰胺二醇）聚合得到。在文献中，聚醚酰胺46在差示扫描量热法（DSC）扫描过程中显示出一系列复杂的热转变。因此，在这项初步探索性研究中，对聚醚酰胺46进行了压缩成型，并通过同步DSC和广角X射线散射（WAXS）分析研究了薄膜样品的熔融行为。在室温下，仅观察到一种介晶相。对样品进行加热扫描会导致α相的形成，这是由一系列部分重叠的熔融和再结晶现象引起的。另一种熔融和再结晶现象导致了β相的形成，β相在约173℃熔化，在此温度之后材料完全变为非晶态且各向同性。α相可通过热退火增强，而β相可通过熔体结晶处理增强。
