Mechanical and thermal properties of polylactic acid blended with recycled polymethyl methacrylate

Polymer Engineering and Science, Год журнала: 2025, Номер unknown

Опубликована: Фев. 14, 2025

Abstract This study investigates the effect of incorporating recycled polymethyl methacrylate (r‐PMMA) into polylactic acid (PLA) and further modifications with a bio‐based compatibilizer (epoxidized soybean oil [ESO]). Various PLA:r‐PMMA ratios were evaluated, without ESO. Blending r‐PMMA PLA significantly influenced mechanical properties. The 10PLA90r‐PMMA blend showed enhanced elongation at break (6.10%) tensile toughness (1686 kJ/m 3 ) compared to pure (3.34% 737 , respectively), addressing PLA's inherent brittleness. 30PLA70r‐PMMA composition exhibited strength (TS) 51.44 MPa significant (1237 ). Thermal analysis revealed an increase in glass transition temperature ( T g higher content, reaching 124°C for 100r‐PMMA, decrease crystallinity percentage from 68.17% (pure PLA) 30.43% (50PLA50r‐PMMA). Incorporating ESO 50 PLA50r‐PMMA modified its Adding parts per hundred resins (phr) improved (5.68%) (1302 while reducing TS (35.03 MPa). At 6 phr ESO, flexibility was maximized 6.37%, but decreased 26.89 MPa. These findings highlight synergy between enhancing performance sustainable applications balancing thermal properties environmental challenges. Highlights enhances & blends. Pure has crystallinity; lowers it 50PLA50r‐PMMA. High content erases melting peaks, indicating minimal crystallinity. boosts crystallization; 50PLA50r‐PMMA increases 31.72%. promotes sustainability via waste reuse eco‐friendly materials.

Язык: Английский

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Harnessing plastic depolymerization products to upcycle mixed waste into high-value chemicals

Chem, Год журнала: 2025, Номер unknown, С. 102485 - 102485

Опубликована: Фев. 1, 2025

Язык: Английский

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Enhancing Polylactic Acid Properties by Blending With Recycled Polycarbonate: The Effect of a Bio‐Based Compatibilizer on Properties

Journal of Applied Polymer Science, Год журнала: 2025, Номер unknown

Опубликована: Апрель 23, 2025

ABSTRACT This study explores enhancing polylactic acid (PLA) by blending it with recycled polycarbonate (r‐PC) to improve its brittleness and thermal limitations. Recycled r‐PC, obtained from compact discs, was mixed PLA in varying ratios (100:0 0:100), using epoxidized soybean oil (ESO) a chain extender (CE) as bio‐based compatibilizers. Scanning electron microscopy revealed smoother fracture surfaces ESO, indicating improved compatibility. Mechanical testing showed significant toughness enhancement, the 30PLA70r‐PC blend reaching 8725 kJ/m 3 —nearly ten times that of pure PLA. ESO raised tensile strength 47.39 MPa 52.57 MPa, while CE increased elongation at break 32.14%. Differential scanning calorimetry indicated reduced crystallinity, dropping 68.17% 10.32% increasing r‐PC. A new transition 225°C ESO‐rich blends suggested enhanced molecular interactions. X‐ray diffraction shift toward an amorphous structure higher r‐PC contents. Dynamic mechanical analysis stability, glass temperature rising 61°C 141°C r‐PC‐rich blends. These findings demonstrate combining biodegradable produces high‐performance, sustainable composites suitable for circular economy applications.

Язык: Английский

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Navigating the Legislative Interventions, Challenges, and Opportunities in Revolutionizing Textile Upcycling/Recycling Processes for a Circular Economy

ACS Sustainable Resource Management, Год журнала: 2024, Номер 1(11), С. 2338 - 2349

Опубликована: Окт. 11, 2024

Embracing a circular economy in the textile industry represents crucial step toward sustainability, where fashion and sectors contribute significantly to CO2 emissions. However, transitioning from linear "take-make-waste" model circularity, poses multifaceted challenges, that highlight staggering volume of annual waste surpassing predictions, thus emphasizing urgent need for comprehensive strategies. Despite advancements recycling technologies, challenges persist collecting sorting waste, fragmentation management processes hinders effective post-consumer waste. Addressing these demands elevated efforts collection, sorting, pre-processing, alongside regulatory interventions drive enhanced collection business models. Efforts are underway promote sustainable recycling, with initiatives like EU's Sustainable Circular Textiles Strategy aiming reduce reliance on virgin resources. achieving market near future requires collaborative action innovative solutions. Though scaling technological limitations still remain, recent breakthroughs textile-recycling technologies offer promise, signaling shift scalable alternatives fibers, bio-based chemical processes, thermochemical present transformative opportunities. Where, bold targets, efforts, short-term funding support narrated this perspective article imperative accelerate transition economy, delving into pivotal role tracing evolution addressing critical hindering widespread adoption.

Язык: Английский

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Upcycling of waste polyester for the development of circular economy

Chemical Communications, Год журнала: 2024, Номер unknown

Опубликована: Янв. 1, 2024

Progress in chemical recycling of waste polyesters (waste plastic refinery) was reviewed and prospected, newly reported thermal catalysis, photocatalysis, electrocatalysis, biocatalysis the recycle PET-based product were introduced.

Язык: Английский

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Enhancing plastic pyrolysis for carbon nanotubes synthesis through machine learning integration: A review

Journal of Analytical and Applied Pyrolysis, Год журнала: 2025, Номер unknown, С. 106989 - 106989

Опубликована: Янв. 1, 2025

Язык: Английский

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Toward Efficient Entropic Recycling by Mastering Ring–Chain Kinetics

Macromolecules, Год журнала: 2025, Номер unknown

Опубликована: Фев. 19, 2025

Traditional chemical recycling approaches for condensation polymers suffer compounding energy losses and CO2 emissions across multiple polymerization depolymerization cycles. Entropic can address these by entrapping free within the deconstruction products. involves to macrocyclic monomers, but such processes have not been feasible due high dilutions typically required generate compounds. Here, we leverage selective catalysis allow entropic at concentrations 20–2000× higher than typical macrocyclization reactions. We find that Ru-based olefin metathesis catalysts containing bulky iodine ligands significantly bias ring–chain kinetic product distribution during ring-closing (RCM) toward formation of oligomeric cycloalkenes. Further improvements in reaction concentration macrocycle yield are obtained using catalyst loadings predisposing alkene substrates undergo favorable macrocyclization. These RCM optimizations translate effectively cyclodepolymerization (CDP) an olefin-containing polymer, with CDP affording similar distributions under identical conditions. Macrocycle entropy-driven ring-opening provides much molecular weight linear analogues, reducing time achieve from hours minutes enabling room temperature. Our findings re-emphasize importance consumption a polymer's lifecycle provide framework design efficient systems.

Язык: Английский

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Balanced uncertainty sets for Closed-Loop supply chain Design: A Data-Driven robust optimization framework with Fairness considerations

Expert Systems with Applications, Год журнала: 2025, Номер unknown, С. 127170 - 127170

Опубликована: Март 1, 2025

Язык: Английский

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Addressing Plastic Waste Challenges in Africa: The Potential of Pyrolysis for Waste-to-Energy Conversion

Clean Technologies, Год журнала: 2025, Номер 7(1), С. 20 - 20

Опубликована: Март 5, 2025

Plastic waste poses a significant challenge in Africa and around the world, with its volume continuing to increase at an alarming rate. In Africa, estimated 25–33% of daily is made up plastic, posing threat environment, marine life, human health. One potential solution this problem waste-to-energy recycling, such as pyrolysis, which involves conversion materials into oil, char, non-condensable gasses through thermochemical process absence oxygen. Given abundance continent’s energy challenges, pyrolysis offers sustainable solution. This review delves concept products, thermodynamics, endothermic kinetics, presenting it promising way address plastic Africa. Despite African Union’s goal recycle waste, continent faces barriers achieving target, including infrastructural, economic, social difficulties. It crucial implement strategies for managing mitigate environmental degradation promote cleaner healthier living environment. Pyrolysis technology highlighted viable management, can convert valuable byproducts syngas. Case studies from countries like South Nigeria demonstrate scaling management issues while generating job opportunities. underscores need investment, regulatory support, public awareness overcome challenges unlock full Embracing method could lead economic benefits continent.

Язык: Английский

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Prospective Use and Assessment of Recycled Plastic in Construction Industry

Recycling, Год журнала: 2025, Номер 10(2), С. 41 - 41

Опубликована: Март 11, 2025

The accumulation of plastic waste poses a significant environmental challenge, necessitating sustainable solutions. This study investigates the potential recycling plastics for use in construction industry, emphasizing their integration into building materials and components. Earlier was excessively studied as an ingredient concrete composites, roads, other research. However, this study, recycled is assessed sole material structural products. Raw plastics, including high-density polyethylene, Low-Density Polyethylene, polypropylene, polyolefin, samicanite, virgin were analyzed through mechanical extrusion, properties to determine feasibility applications. In extrusion process, combined with engineered dyes, investigated comprehensive testing per ASTM standards obtain desired construction. Advanced characterization techniques, SEM, FTIR, TGA, employed evaluate chemical composition, thermal stability, impurities these collected from municipal waste. A gas emission analysis during confirmed minimal impact, validating sustainability process. Municipal has considerable quantum HDPE, PP, LDPE, which considered research total 140 samples tested across shear, flexural, tensile, compression categories: 35 each. results showed that rHDPE PP had good tensile strength shear resistance. findings pave way developing cost-effective, durable, eco-friendly materials, such rebars, corrugated sheet, blocks, products, contributing conservation resource efficiency Industry.

Язык: Английский

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