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Biodegradable High-Molecular-Weight Poly(pentylene adipate-co-terephthalate): Synthesis, Thermo-Mechanical Properties, Microstructures, and Biodegradation
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Researchers synthesized high-molecular-weight poly(pentylene adipate-co-terephthalate) (PPAT), a biodegradable polyester with tensile properties up to 76% stronger than comparable PBAT films and approaching those of linear low-density polyethylene. PPAT biodegrades in soil within roughly 504–580 days, making it a promising sustainable alternative for flexible packaging applications.
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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Partially Bio-Based and Biodegradable Poly(Propylene Terephthalate-Co-Adipate) Copolymers: Synthesis, Thermal Properties, and Enzymatic Degradation Behavior
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Researchers synthesized a series of partially bio-based poly(propylene terephthalate-co-adipate) copolymers and found that increasing the adipate content reduced crystallinity and wettability while accelerating enzymatic degradation, with copolymers containing more than 45% adipate units showing significant breakdown within 30 days.
Poly (Butylene Adipate‐Co‐Terephthalate) (PBAT) – Based Biocomposites: A Comprehensive Review
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PBAT biocomposites review: blending improves mechanical/barrier properties while maintaining biodegradability for packaging.
Fabrication of Lignin/Pbat Biodegradable Plastics Films via Reactive Extrusion and Their Thermal, Mechanical and Water Absorption Properties
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Researchers developed biodegradable films made from poly(butylene adipate-co-terephthalate) (PBAT) and lignin as a sustainable alternative to conventional polyethylene packaging films. Replacing fossil-fuel-based plastic films with biodegradable alternatives could reduce the microplastic pollution that results from conventional plastic film degradation in the environment.
Recent advances in poly(butylene adipate-co-terephthalate) (PBAT): structure, modification strategies, degradation, and sustainable applications
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This review paper rounds up what scientists currently know about PBAT, a biodegradable plastic being used in food packaging, farm films, and even medical devices as an alternative to traditional plastics that never break down. While PBAT does degrade in soil and water more effectively than conventional plastic, the research notes a catch worth watching: it can still shed microplastics during the breakdown process, meaning "biodegradable" doesn't automatically mean risk-free for ecosystems or human exposure. More research is needed to make sure these materials fully break down safely before they become a bigger part of everyday products.
High performance and water‐degradable poly(neopentyl terephthalate‐co‐neopentyl succinate) copolymers: Synthesis, properties, and hydrolysis in different aquatic bodies
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Researchers synthesized a series of novel biodegradable copolymers designed to degrade in water, offering a potential solution to marine microplastic pollution from plastic packaging. The materials showed strong mechanical properties comparable to conventional plastics while breaking down in freshwater and seawater environments.
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