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Low‐crystallinity to highly amorphous copolyesters with high glass transition temperatures based on rigid carbohydrate‐derived building blocks
Polymer International ( IF 2.9 ) Pub Date : 2020-09-11 , DOI: 10.1002/pi.6123 Jingying Chen 1, 2 , Yiming Lin 1 , Yong Chen 1, 3 , Cor E Koning 2, 4 , Jing Wu 3 , Huaping Wang 1, 3
Polymer International ( IF 2.9 ) Pub Date : 2020-09-11 , DOI: 10.1002/pi.6123 Jingying Chen 1, 2 , Yiming Lin 1 , Yong Chen 1, 3 , Cor E Koning 2, 4 , Jing Wu 3 , Huaping Wang 1, 3
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The current trend of developing novel biobased polymeric materials is focused more on utilizing the unique structural/physical properties of renewable building blocks towards niche market applications. In this work, with the aim of developing low‐crystallinity to amorphous polyesters with enhanced thermal properties, a series of copolyesters based on rigid and structurally asymmetric carbohydrate‐derived building blocks, namely furan‐2,5‐dicarboxylic acid and isosorbide, and 1,4‐butanediol were successfully synthesized using melt polycondensation. The copolyesters were obtained with varied chemical compositions and rather high molecular weights (Mn = 24 000–31 000 g mol−1) and intrinsic viscosities ([η] = 0.56–0.72 dL g−1). Incorporation of both building blocks significantly enhances the glass transition temperatures (Tg = 38–107 °C) of polyesters, and also efficiently inhibits the crystallization of the copolyesters. A low content of isosorbide (ca 10 mol%) leads to complete transition of the homopolyester to nearly fully amorphous materials. Detailed characterizations of the chemical structures and thermal properties of the synthesized copolyesters were conducted using various analytical techniques. In addition, hydrolytic and enzymatic degradations of the copolymers in the presence of porcine pancreatic lipase and cutinase were also investigated. © 2020 Society of Industrial Chemistry
中文翻译：
基于硬质碳水化合物衍生的结构单元，具有高玻璃化转变温度的低结晶度至高度非晶态共聚酯
目前，开发新型生物基聚合物材料的趋势更多地集中在利用可再生建筑材料的独特结构/物理特性来面向特定市场。在这项工作中，为了将低结晶度发展为具有增强的热性能的无定形聚酯，一系列基于刚性和结构不对称的碳水化合物衍生结构单元的共聚酯，即呋喃-2,5-二羧酸和异山梨醇，以及1熔融缩聚法成功地合成了4-丁二醇。获得的共聚酯具有不同的化学组成，较高的分子量（M n = 24 000–31 000 g mol -1）和固有粘度（[ η ] = 0.56-0.72 dL g -1）。两种结构单元的结合均可以显着提高聚酯的玻璃化转变温度（T g = 38–107°C），并且还可以有效抑制共聚酯的结晶。异山梨醇含量低（约10 mol％）会导致均聚酯完全过渡到几乎完全无定形的材料。使用各种分析技术对合成共聚酯的化学结构和热性能进行了详细的表征。另外，还研究了在猪胰脂肪酶和角质酶存在下共聚物的水解和酶促降解。©2020工业化学学会
更新日期：2020-09-11
中文翻译：
基于硬质碳水化合物衍生的结构单元，具有高玻璃化转变温度的低结晶度至高度非晶态共聚酯
目前，开发新型生物基聚合物材料的趋势更多地集中在利用可再生建筑材料的独特结构/物理特性来面向特定市场。在这项工作中，为了将低结晶度发展为具有增强的热性能的无定形聚酯，一系列基于刚性和结构不对称的碳水化合物衍生结构单元的共聚酯，即呋喃-2,5-二羧酸和异山梨醇，以及1熔融缩聚法成功地合成了4-丁二醇。获得的共聚酯具有不同的化学组成，较高的分子量（M n = 24 000–31 000 g mol -1）和固有粘度（[ η ] = 0.56-0.72 dL g -1）。两种结构单元的结合均可以显着提高聚酯的玻璃化转变温度（T g = 38–107°C），并且还可以有效抑制共聚酯的结晶。异山梨醇含量低（约10 mol％）会导致均聚酯完全过渡到几乎完全无定形的材料。使用各种分析技术对合成共聚酯的化学结构和热性能进行了详细的表征。另外，还研究了在猪胰脂肪酶和角质酶存在下共聚物的水解和酶促降解。©2020工业化学学会
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