Chemical Engineering Journal, Год журнала: 2024, Номер unknown, С. 158190 - 158190
Опубликована: Ноя. 1, 2024
Язык: Английский
Polymers, Год журнала: 2025, Номер 17(5), С. 606 - 606
Опубликована: Фев. 24, 2025
This study investigates enhancing polylactic acid (PLA) by incorporating recycled polycarbonate (r-PC) to address PLA's inherent brittleness and limited thermal stability. Blends with varying PLA/r-PC ratios (100:0 0:100) were prepared using an internal mixer, r-PC sourced from discarded compact discs. The thermogravimetric analysis (-A) demonstrated significant improvements in the degradation onset temperature (T5 wt%) increased approximately 315 °C for pure PLA about 400 blends, a maximum decomposition (Tmax) of 520 observed r-PC. char residue also markedly, 1.35% 24.42% r-PC, indicating enhanced resistance. Differential scanning calorimetry (DSC) revealed considerable reduction crystallinity, declining 68.17% 10.32% 10PLA90r-PC blend, indicative disruption crystalline structure. X-ray diffraction (XRD) supported these findings, showing transition predominantly amorphous structure at higher contents. Tensile testing highlighted mechanical achieved through blending. While exhibited brittle failure, 30PLA70r-PC blend displayed plastic deformation, signifying improved toughness. stress-strain that peak toughness 8725 kJ/m3, nearly ten times than 924 kJ/m3 recorded PLA. However, excessive content introduced brittleness, diminishing dynamic (DMTA) broadening glass range, Tg shifting 61 141 r-PC-dominant reflecting phase interactions between two polymers. Scanning electron microscopy (SEM) morphological changes; high contents, separation voids observed, leading reduced performance. These results highlight synergistic potential blending biodegradability r-PC's superior properties.
Язык: Английский
Процитировано
1
Environmental Science & Technology, Год журнала: 2025, Номер unknown
Опубликована: Март 10, 2025
Recent plastic flow research has largely focused on commodity plastics (PE, PP, PVC, PS, ABS), yet a sizable share of other polymer types remains understudied. These non-commodity suffer from inconsistent definitions, complex classifications, and data gaps, which hinder accurate assessment their production, use, end-of-life management. This study develops dynamic material analysis to investigate 12 key "non-commodity" in China─including PET, PU, seven engineering plastics, three thermosetting plastics─and addresses these knowledge gaps. Our results show that 2022, China produces approximately 85 million tonnes polymers, volume comparable with 35% used products the remainder non-plastic applications (e.g., fibers, rubber). PET is predominantly employed short-lifespan packaging, whereas find use longer-lifespan applications, underscoring need for targeted recycling strategies─particularly chemical PU thermoset products. Revisiting scope "plastics" using scientific criteria can help mitigate definitional ambiguities guide more effective policymaking. By improving availability tracking this underexplored category, our lays groundwork assessments interventions reduce pollution.
Язык: Английский
Процитировано
1
Advanced Energy Materials, Год журнала: 2024, Номер 14(45)
Опубликована: Сен. 5, 2024
Abstract The market for polycarbonate (PC), a versatile material, is growing rapidly. Despite its widespread use in many applications, poor chemical resistance and roughness have hindered adoption as substrate solar cell technologies. Here, the first‐ever perovskite (PSC) demonstrated on PC films. A solution‐processed planarizing layer developed using commercial ambient‐curable refractory resin through blade coating which decreased film from 1.46 µm to 23 nm, lowered water vapor transmission rates (WVTR) by half, significantly improved solvent enabling deposition of precursor inks. PSCs are fabricated planarized substrate, with customized ITO electrode an average visible transparency 78%, sheet 25 Ω/sq, safe bending radius 20 mm. power conversion efficiency (PCE) reached 13.0%. unencapsulated retained 80% initial PCE after 1776 h upon ISOS‐D‐1 shelf‐life tests. These results open new pathways integrating cells products made materials, such ID cards, smart windows, skylights, buildings, product packaging, well introducing solution planarization barrier that can be used other types optoelectronic devices (LEDs, transistors, etc.) substrates.
Язык: Английский
Процитировано
4
Langmuir, Год журнала: 2025, Номер unknown
Опубликована: Март 3, 2025
Plastics play a vital role in modern society, but their accumulation landfills and the environment presents significant risks to ecosystems human health. In addition, discarding of plastic waste constitutes loss valuable material. While usual mechanical recycling method often results reduced material quality, chemical offers exciting opportunities valorize into compounds interest. Its versatility leans on broad horizon reactions applicable, such as hydrogenolysis, hydrolysis, alcoholysis, or aminolysis. The development heterogeneous supported organocatalysts has enormous potential enhance economic industrial viability these technologies, reducing cost process mitigating its global environmental impact. This review summarizes challenges chemically heteroatom-containing plastics through catalysis, covering widely used polyesters (notably PET PLA), BPA-polycarbonate (BPA-PC), polyurethane (PU), polyamide (PA), polyether. It examines limitations various solid catalysts, including clays, zeolites, metal–organic frameworks well immobilized enzymes (heterogeneous biocatalysts), for that facilitate recovery high-value products. By reintroducing products economy precursors, this approach supports more sustainable lifecycle plastics, aligning with principles circular economy.
Язык: Английский
Процитировано
0
Industrial & Engineering Chemistry Research, Год журнала: 2025, Номер unknown
Опубликована: Март 24, 2025
Язык: Английский
Процитировано
0
The Journal of Supercritical Fluids, Год журнала: 2025, Номер unknown, С. 106610 - 106610
Опубликована: Март 1, 2025
Язык: Английский
Процитировано
0
Polymer-Plastics Technology and Materials, Год журнала: 2025, Номер unknown, С. 1 - 32
Опубликована: Апрель 8, 2025
Язык: Английский
Процитировано
0
Waste Management, Год журнала: 2025, Номер 202, С. 114798 - 114798
Опубликована: Апрель 19, 2025
Язык: Английский
Процитировано
0
Separation and Purification Technology, Год журнала: 2025, Номер unknown, С. 133293 - 133293
Опубликована: Апрель 1, 2025
Язык: Английский
Процитировано
0
Applied Catalysis B Environment and Energy, Год журнала: 2025, Номер unknown, С. 125485 - 125485
Опубликована: Май 1, 2025
Язык: Английский
Процитировано
0