The Extensional Rheology of Biodegradable Polymers Determines Their Propensity to Be Film Blown

Опубликована: Янв. 1, 2024

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Язык: Английский

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The extensional rheology of biodegradable polymers determines their propensity to be film blown

Polymer Degradation and Stability, Год журнала: 2024, Номер 227, С. 110888 - 110888

Опубликована: Июнь 21, 2024

Non-degradable plastic pollution, particularly from single-use packaging, poses a growing threat to the environment. To address this, biodegradable alternatives have gained attention. However, processing these polymers into thin films for packaging applications remains challenge due their poor film blowing behaviour, which is neither well understood nor documented. This study presents novel conceptual framework help understand underlying reasons this performance. Through standardised methods, systematic assessment of extensional rheology behaviour various relative low-density polyethylene (LDPE) was characterised over range temperatures and strain rates, with degree hardening being recorded each. The properties were then correlated observations pilot-scale experiments. findings reveal that partial crosslinking (e.g. partially cross-linked polycaprolactone) facilitates significant across wide temperature allows blowing. Conversely, only display at slightly above melting point poly(butylene adipate-co-terephthalate) succinate) are more challenging blow. Additionally, lacking poly(3-hydroxybutyrate-co-3-hydroxyvalerate), poly(3-hydroxybutyrate-co-3-hydroxyhexanoate), poly(lactic acid), linear present difficulties in excessive sagging low melt strength, resulting bubble instability collapse. research sheds light on rheological impact processability practical applications, providing valuable insights development sustainable alternatives.

Язык: Английский

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Structure and stability of an apo thermophilic esterase that hydrolyzes polyhydroxybutyrate

Acta Crystallographica Section D Structural Biology, Год журнала: 2024, Номер 80(11), С. 791 - 799

Опубликована: Окт. 23, 2024

Pollution from plastics is a global problem that threatens the biosphere for host of reasons, including time scale it takes most to degrade. Biodegradation an ideal solution remediating bioplastic waste as does not require high temperatures necessary thermal degradation and introduce additional pollutants into environment. Numerous organisms can scavenge bioplastics, such polylactic acid (PLA) or poly-( R )-hydroxybutyrate (PHB), which they use energy source. Recently, promiscuous PHBase thermophilic soil bacterium Lihuaxuella thermophila ( Lt PHBase) was identified. accommodate many substrates, PHB granules films block copolymers, well unrelated polymers polycaprolactone (PCL). uses expected Ser–His–Asp catalytic triad hydrolysis at optimal enzyme activity near 70°C. Here, 1.75 Å resolution crystal structure apo presented its chemical stability profiled. Knowledge substrate preferences extended different-sized granules. It shown highly resistant unfolding, with barriers typical enzymes, shows preference low-molecular-mass These insights have implications long-term potential industrial hydrolase shed light on evolutionary role this plays in bacterial metabolism.

Язык: Английский

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Exploring biodegradable alternatives: microorganism-mediated plastic degradation and environmental policies for sustainable plastic management

Archives of Microbiology, Год журнала: 2024, Номер 206(12)

Опубликована: Ноя. 5, 2024

Язык: Английский

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Reinforcement of Soy Protein-Based Bioplastics as Potential Sustainable Packaging Solutions

Future Foods, Год журнала: 2024, Номер 11, С. 100524 - 100524

Опубликована: Дек. 14, 2024

Язык: Английский

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Ring-closing depolymerization of polyglycolide to glycolide through a synergistic transesterification strategy

Polymer, Год журнала: 2024, Номер unknown, С. 127957 - 127957

Опубликована: Дек. 1, 2024

Язык: Английский

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