Characterization and thermal degradation of polypropylene–montmorillonite nanocomposites

Bertini, Fabio; Canetti, Maurizio; Audisio, Guido; Costa, Giovanna; Falqui, Luciano

doi:10.1016/j.polymdegradstab.2005.02.027

Cited by 119 publications

(54 citation statements)

References 28 publications

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“…In addition, waste PCBs may have good flame retardant performance because of the poly-metallic complex system may induce synergistic effect in flame retardant behavior. Flame retardants with poly-metallic, such as artificial synthesized compounded flame retardants with metallic oxide or metal chloride [21,22], or natural materials of kaolinite, montmorillonite, and talc [23][24][25] could usually enhance the flame retardancy of polymer materials. However, these metals especially the copper contained in waste PCBs exist mainly as zero-valent metal, which has no any flame retardant performance.…”

Section: Introductionmentioning

confidence: 99%

A novel reutilization method for waste printed circuit boards as flame retardant and smoke suppressant for poly (vinyl chloride)

Xiu

Weng

et al. 2016

Journal of Hazardous Materials

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h i g h l i g h t s• We report a novel electronic waste-based flame retardant for PVC.• The SCWO-treated PCBs significantly improves the flame retardancy of PVC.• The flame retardant mechanism of SCWO-treated PCBs was studied.• Appropriate amount flame retardant does not degrade the mechanical property of PVC. a r t i c l e i n f o b s t r a c tIn this study, a novel reutilization method for waste printed circuit boards (PCBs) as flame retardant and smoke suppressant for poly (vinyl chloride) (PVC) was successfully testified. A supercritical water oxidation (SCWO) process was applied to treat waste PCBs before they could be used as flame retardants of PVC. The results indicated that SCWO conditions had a significant effect on the flame retarding and smoke suppressing properties of waste PCBs for PVC. Cu 2 O, CuO, and SnO 2 were the main active ingredients in waste PCBs-derived flame retardants. A conversion of Cu elements (Cu 0 → Cu + → Cu 2+ ) during SCWO process with the increase of reaction temperature was found to be the key influence factor for the flame retarding properties of SCWO-treated PCBs. The experiment results also showed that there was a synergistic effect of flame retardancy between Cu + and Cu 2+ . After the optimized SCWO treatment, SCWO-treated PCBs significantly improved the flame retardancy and smoke suppression of PVC. Limiting oxygen index (LOI) and char yield (CY) increased with increasing SCWO-treated PCBs content in PVC, while smoke density rating (SDR) and maximum smoke density (MSD) decreased markedly. The mechanical properties of PVC samples were influenced in different degree by adding different content SCWO-treated PCBs.

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Section: Introductionmentioning

confidence: 99%

A novel reutilization method for waste printed circuit boards as flame retardant and smoke suppressant for poly (vinyl chloride)

Xiu

Weng

et al. 2016

Journal of Hazardous Materials

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“…Good tear strength (Gatos and Karger-Kocsis 2007), higher dynamic mechanical properties (Venkatesh et al 2012), increased flammability resistance (Tabuani et al 2011;Zanetti and Costa 2004;Zhang et al 2009) reduced coefficient of thermal expansion; and enhanced thermal stability (Hemati and Garmabi 2011;Durmus et al 2007;Xue et al 2011;Bertini et al 2006) have been reported as some of the achievements of using nanoclay as reinforcement in polymers. Polymer/organoclay nanocomposite formation was studied by many researchers (Alexandre and Dubois 2000;Zanetti 2000;Lagaly 1986) and were found to exhibit unique property combinations.…”

Section: Properties Of Nanocompositesmentioning

confidence: 99%

Nanoclay/Polymer Composites: Recent Developments and Future Prospects

Dasan

2015

Advanced Structured Materials

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Clay can be counted among the most widely investigated and commercially high demand filler in the polymer industry. Recently there has been a growing interest for the development of polymer/clay nanocomposites due to their superior properties compared to conventional filled polymers even at a very low fraction of filler addition. The easy availability, processability, low cost, and nontoxicity of clay and the advancements in the processing of clay nanocomposites have invited a lot of commercial attention for these materials. The value-added properties enhanced without sacrificing of pure polymer properties make the clays more and more important in the modern polymer industry. Today it finds a wide range of applications ranging from household items to aerospace to medicine. This chapter looks at the chemical and physical aspects of this wonderful material, clay/polymer nanocomposite processing techniques, and the commercial importance of these nanocomposites.

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“…É bem aceito que a melhoria da estabilidade térmica ocorre principalmente devido ao fato de que as camadas de argila dificultam a liberação dos produtos voláteis, provenientes da decomposição [34][35][36] . Os resultados representados na Tabela 3 indicam um efeito contrário ao esperado, com redução da estabilidade térmica, notada pela redução nos valores de T 5% e T máx .…”

Section: Caracterização Dos Nanocompósitosunclassified

Estudo da influência de argilas organofílicas no processo de biodegradação do PLA

et al. 2014

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Resumo: Neste estudo, foram preparados, pelo método de intercalação do fundido, nanocompósitos de PLA com as argilas organofílicas Cloisite 20A e Cloisite 30B. A influência das argilas no processo de biodegradação do PLA foi avaliada com base no método de respirometria. A incorporação da argila Cloisite 20A praticamente não alterou a curva de mineralização do PLA. O nanocompósito com Cloisite 30B, por sua vez, apresentou um comportamento distinto, indicando um atraso no processo de biodegradação do polímero neste material. As amostras foram caracterizadas pelas técnicas de Difração de Raios X, Análise Termogravimétrica e Calorimetria Diferencial Exploratória. A caracterização dos materiais indicou uma estrutura possivelmente intercalada dos nanocompósitos, bem como a redução da estabilidade térmica e um pequeno aumento no grau de cristalinidade, em relação ao polímero puro. Palavras-chave: Poli(ácido lático), nanocompósitos, biodegradação. Study of the Influence from Organoclays on the Biodegradation Process of PLAAbstract: In this study nanocomposites of PLA and organoclays Cloisite 20A and Cloisite 30B were prepared by melt intercalation. The influence from the organoclays on the biodegradation of PLA was evaluated based on the respirometry method. The incorporation of clay Cloisite 20A did not change the mineralization curve of PLA. The nanocomposite with Cloisite 30B, on the other hand, presented a different behavior, indicating a delay in the polymer biodegradation. The materials were characterized by X-ray Diffraction, Thermogravimetric Analysis and Differential Scanning Calorimetry. The materials characterization indicated nanocomposites with an intercalated structure as well as reduced thermal stability and a slight increase in the degree of crystallinity compared to the pure polymer.

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Characterization and thermal degradation of polypropylene–montmorillonite nanocomposites

Cited by 119 publications

References 28 publications

A novel reutilization method for waste printed circuit boards as flame retardant and smoke suppressant for poly (vinyl chloride)

A novel reutilization method for waste printed circuit boards as flame retardant and smoke suppressant for poly (vinyl chloride)

Nanoclay/Polymer Composites: Recent Developments and Future Prospects

Estudo da influência de argilas organofílicas no processo de biodegradação do PLA

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