We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Properties and application of PLA/mung bean starch composites: Effect of the soft segment molecular weight of PCL-based polyurethane prepolymer
AI summary Read the abstract
Researchers synthesized polycaprolactone-based polyurethane prepolymers as compatibilizers for PLA/mung bean starch biocomposites, finding that lower-molecular-weight prepolymers produced stronger chemical cross-linking at the polymer interface, yielding a 27% increase in tensile strength and 163% improvement in elongation at break.
The escalating crisis of global plastic pollution has intensified the demand for eco-friendly and biodegradable materials. Polylactic acid (PLA) stands as a prominent candidate in this regard, valued for its biodegradability and biocompatibility. However, incorporating fillers to reduce cost and modify properties often introduces challenges in interfacial compatibility. In this study, a polycaprolactone-based polyurethane prepolymer (PCLPU) was synthesized as a compatibilizer to improve the poor interfacial adhesion between PLA and mung bean starch (MBS). PLA/MBS/PCLPU composites were prepared by melt extrusion, and the influence of the soft segment molecular weight of PCLPU on the structure and properties of the composites was systematically investigated. Results indicate that PCLPU enhances the toughness of the composites through a combination of chemical bonding and physical cross-linking. Although PCLPUs with different soft segment molecular weights all contributed to toughening, a lower molecular weight promoted more complete chemical cross-linking, resulting in more pronounced improvements in mechanical performance. In particular, the composite compatibilized with the lowest-molecular-weight prepolymer (PLAPSPU-500) exhibited the most significant enhancement, with a 27.14% increase in tensile strength, 162.67% in elongation at break, 175.00% in impact strength, and 31.62% in flexural strength, compared to PLA/MBS composites without compatibilizer. This work provides a viable strategy for developing high-performance PLA-based biodegradable composites, thereby facilitating the broader adoption of sustainable materials.
More Papers Like This
Poly(lactic acid)/ poly(ε-caprolactone) blends: the effect of nanocalcium carbonate and glycidyl methacrylate on miscibility
AI summary Read the abstract
Researchers investigated the effect of adding glycidyl methacrylate and nano calcium carbonate to poly(lactic acid)/poly(epsilon-caprolactone) blends, finding that both additives improved interfacial adhesion and mechanical properties of the otherwise poorly miscible PLA/PCL system.
Hydrogen-bonded lignin-acrylic copolymer/WPU composites with Integrated UV shielding, antioxidancy and degradability
AI summary Read the abstract
Researchers synthesized a lignin-acrylic copolymer from rice straw waste and blended it with waterborne polyurethane to create a composite film with 43% higher tensile strength, near-total UV blocking, and dramatically improved antioxidant capacity, offering a biodegradable, microplastic-reducing alternative to conventional plastic films.
Enhanced Compatibility of Waste PET/PBAT Composites via Polyurethane Compatibilizers: Structure and Properties
AI summary Read the abstract
Scientists found a way to blend recycled plastic bottles (PET) with a biodegradable plastic (PBAT) by adding a special binding ingredient, creating a stronger, more flexible material than either plastic alone. This matters because it gives waste plastic a useful second life instead of it breaking down into microplastics that pollute our environment and potentially end up in our food and water. While this study focuses on material engineering rather than direct health testing, better recycling solutions like this could help reduce the growing amount of plastic waste linked to microplastic contamination concerns.
High-performance biodegradable poly(lactic acid) composites with xylan and lignin copolymer
AI summary Read the abstract
Researchers developed high-performance biodegradable poly(lactic acid) composites by incorporating xylan and lignin derived from lignocellulosic biomass, improving PLA mechanical properties and addressing its brittleness limitations while maintaining biodegradability as a sustainable alternative to conventional plastics.
Biodegradable Polyurethane Derived from Hydroxylated Polylactide with Superior Mechanical Properties
AI summary Read the abstract
Researchers synthesized biodegradable polyurethane using polylactide polyols derived from lactide, finding that increasing the polylactide content dramatically improved tensile stress (from 5 to 37 MPa), elongation, and toughness, while the resulting films fully degraded to CO2 and water within 6 months in soil.
Research digests by email
When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.