Wang Lizheng, Tu Zhu, Liang Jiaming, Wei Zhiyong
State Key Laboratory of Fine Chemicals, Liaoning Key Laboratory of Polymer Science and Engineering, Department of Polymer Science and Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China.
State Key Laboratory of Fine Chemicals, Liaoning Key Laboratory of Polymer Science and Engineering, Department of Polymer Science and Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China.
J Hazard Mater. 2024 Jun 5;471:134349. doi: 10.1016/j.jhazmat.2024.134349. Epub 2024 Apr 18.
Concerns over worldwide plastic pollution have led to the development of biodegradable polyester materials with excellent physical and chemical properties through the copolymerization of poly(butylene oxalate) (PBOx). As a result, poly(butylene oxalate-co-terephthalate)s (PBOTs) with varying compositions, were prepared by incorporating aromatic units. Studies have indicated that PBOT-47 (with a 47% molar terephthalate), exhibits exceptional mechanical properties. With an elongation at break of 1160% and a tensile strength that remains above 30 MPa, similar to or even better than those of the commercial biodegradable plastic poly(butylene adipate-co-terephthalate) PBAT-47 (47% molar terephthalate). Moreover, the permeability coefficients of PBAT-47 for HO, CO and O were 5.8, 50.6 and 5.6 times higher than that of PBOT-47, revealing the superior barrier properties of PBOT. Through experimental research and theoretical simulation, the mechanism of the copolymer hydrolysis was elucidated. The readily hydrolytic nature of the oxalate unit endows it with the capacity for rapid degradation, possessing the potential to be a short-term degradable material with physical properties similar to PBAT.
对全球塑料污染的担忧促使人们通过聚（草酸丁二酯）（PBOx）的共聚反应来开发具有优异物理和化学性能的可生物降解聚酯材料。因此，通过引入芳香族单元制备了具有不同组成的聚（草酸丁二酯-共-对苯二甲酸酯）（PBOTs）。研究表明，PBOT-47（对苯二甲酸酯摩尔含量为47%）具有出色的机械性能。其断裂伸长率为1160%，拉伸强度保持在30MPa以上，与商业可生物降解塑料聚（己二酸丁二酯-共-对苯二甲酸酯）PBAT-47（对苯二甲酸酯摩尔含量为47%）相似甚至更好。此外，PBAT-47对H₂O、CO₂和O₂的渗透系数分别比PBOT-47高5.8倍、50.6倍和5.6倍，这表明PBOT具有优异的阻隔性能。通过实验研究和理论模拟，阐明了共聚物水解的机理。草酸酯单元易于水解的特性使其具有快速降解的能力，有可能成为一种物理性能与PBAT相似的短期可降解材料。
