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首页> 美国卫生研究院文献>Polymers >Copolyesters Based on 2,5-Furandicarboxylic Acid (FDCA): Effect of 2,2,4,4-Tetramethyl-1,3-Cyclobutanediol Units on Their Properties
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Copolyesters Based on 2,5-Furandicarboxylic Acid (FDCA): Effect of 2,2,4,4-Tetramethyl-1,3-Cyclobutanediol Units on Their Properties

机译：基于2,5-呋喃二甲酸（FDCA）的共聚酯：2,2,4,4-四甲基-1,3-环丁二醇单元对其性能的影响

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摘要

Bio-based polyesters derived from 2,5-furandicarboxylic acid (FDCA), including poly (ethylene 2,5-furandicarboxylate) (PEF), poly(propylene 2,5-furandicarboxylate) (PPF), and poly(butylene 2,5-furandicarboxylate) (PBF) have been synthesized and modified with 2,2,4,4-tetramethyl-1,3-cyclobutanediol (CBDO). Copolyesters with increased glass transition temperature, good barrier and better mechanical properties, as well as higher transparency were reported in this work. The chemical structures, composition, and sequence distribution of the copolyesters were determined by 1H NMR and 13C NMR. The degree of random (R) was close to 1 for all the copolyesters, indicating their random chemical structures. With the introduction of 10% CBDO units, the semi-crystalline PEF and PPF were changed into completely amorphous polyesters and the higher transparency was easily achieved. The glass transition temperature was increased from 87 °C for PEF to 91.1 °C for PETF-18, from 55.5 °C for PPF to 63.5 °C for PPTF-18, and from 39.0 °C for PBF to 43.5 °C for PBTF-18. The barrier properties investigation demonstrated that although the O2 and CO2 barrier of PEF/PPF/PBF were decreased by the addition of CBDO units, the modified copolyesters still showed good barrier properties.
机译：衍生自2,5-呋喃二甲酸（FDCA）的生物基聚酯，包括聚（2,5-呋喃二甲酸乙烯酯）（PEF），聚（2,5-呋喃二甲酸丙烯酯）（PPF）和聚（丁烯2,5 -呋喃二甲酸）（PBF）已合成并用2,2,4,4-四甲基-1,3-环丁二醇（CBDO）进行了改性。据报道，这种共聚酯具有更高的玻璃化转变温度，良好的阻隔性和更好的机械性能以及更高的透明度。通过 1 1 H NMR和 13 C NMR测定共聚酯的化学结构，组成和序列分布。所有共聚酯的无规度（R）接近1，表明它们的无规化学结构。通过引入10％的CBDO单元，半结晶PEF和PPF转变为完全无定形的聚酯，并且易于实现更高的透明度。玻璃化温度从PEF的87°C升高到PETF-18的91.1°C，PPF的从55.5°C升高到PPTF-18的63.5°C，PBF的从39.0°C升高到PBTF-4的43.5°C 18岁阻隔性能研究表明，尽管通过添加CBDO单元降低了PEF / PPF / PBF的O2和CO2阻隔性能，但改性共聚酯仍显示出良好的阻隔性能。

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