己二酸
生物降解
聚酯纤维
结晶度
材料科学
极限抗拉强度
聚对苯二甲酸乙二醇酯
聚合物
复合材料
化学工程
高分子化学
线性低密度聚乙烯
有机化学
化学
工程类
作者
Lei Zheng,Min Soo Kim,Shu Xu,Meltem Urgun‐Demirtas,George W. Huber,John D. Klier
出处
期刊:ACS Sustainable Chemistry & Engineering
[American Chemical Society]
日期:2023-09-14
卷期号:11 (38): 13885-13895
标识
DOI:10.1021/acssuschemeng.3c01831
摘要
Poly(pentylene adipate-co-terephthalate) (PPAT) is a promising biobased and biodegradable polymer that can replace polyethylene in flexible packaging films where biodegradability is desired. High-molecular-weight (100K–145 KDa) aliphatic–aromatic polyester PPAT was successfully synthesized, and the effects of reaction conditions on molecular weight were reported. PPAT polyesters were characterized for polymer compositions, number-average unit length, thermal transitions, and rheological properties. PPAT compression-molded films were characterized for crystallinity and tensile properties to correlate micro- and macroproperties. PPAT compression-molded films exhibited up to a 76% higher tensile modulus than compression-molded films from poly(butylene adipate-co-terephthalate) (PBAT), making PPAT films potentially comparable with compression-molded films from linear low-density polyethylene (LLDPE). PPAT is biodegradable in soil and freshwater environments with estimated 90% biodegradation times of 504–580 and 604–845 days, respectively, while PBAT takes 971 days in soil and 395 days in freshwater.
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