Intercalation of anionic organic ultraviolet absorbers in bimetallic and trimetallic layered double hydroxides for low-density polyethylene protection
| Autor: | Neffer Arvey Gomez Gomez, Fernando Wypych, Gabriel Machado Silva |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Nanocomposite Polymers and Plastics Polymer nanocomposite Coprecipitation Intercalation (chemistry) Layered double hydroxides 02 engineering and technology General Chemistry engineering.material Polyethylene 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Low-density polyethylene chemistry.chemical_compound chemistry Chemical engineering Materials Chemistry engineering 0210 nano-technology Bimetallic strip |
| Zdroj: | Polymer Bulletin. 79:3523-3540 |
| ISSN: | 1436-2449 0170-0839 |
| DOI: | 10.1007/s00289-021-03640-x |
| Popis: | Bimetallic (Zn/Al) and trimetallic (Mg,Zn/Al) layered double hydroxides (LDHs) intercalated with nitrate were synthesized by the coprecipitation method and used as precursors to obtain LDHs intercalated with the organic anions 4–4′-diamino-2,2′-stilbenedisulfonate and ortho-phthalate through anion exchange reactions. The materials were used as fillers in different ratios in low-density polyethylene (LDPE) to obtain polymer nanocomposites by extrusion-injection molding. The layered materials were characterized by several instrumental techniques, and the mechanical properties of the nanocomposites were evaluated. The samples were exposed to thermo-oxidative conditions at 60 and 90 °C for 1194 h, and the degradation process of the polymer nanocomposites was studied by measurements of hardness, weight loss and oxidation index. Results showed that trimetallic and bimetallic LDH had a notable effect on the LDPE nanocomposites’ degradation, depending on the intercalated anion. Both systems showed potential use as environmentally friendly stabilizers of polymeric matrices, reducing material damage induced by heat and oxidation, increasing the lifetime of the material and lowering the environmental impact. |
| Databáze: | OpenAIRE |
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