Mechanical, thermal and flammability properties of polyethylene/clay nanocomposites

Zhao, Chungui; Qin, Hongling; Gong, Feilong; Feng, Mang; Zhang, Shimin; Yang, Mingshu

doi:10.1016/j.polymdegradstab.2004.08.005

Cited by 336 publications

(203 citation statements)

References 28 publications

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“…This behavior can be explained by the intercalated/exfoliated state observed in TEM image (Figure 1d). Zhao et al 32 suggested Tonset -temperature of onset decomposition; T5% -temperature of 5% of weight loss.…”

Section: Influence Of Intercalation Methods In Properties Of Clay Andmentioning

confidence: 99%

Influence of intercalation methods in properties of Clay and carbon nanotube and high density polyethylene nanocomposites

et al. 2014

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Section: Influence Of Intercalation Methods In Properties Of Clay Andmentioning

confidence: 99%

Influence of intercalation methods in properties of Clay and carbon nanotube and high density polyethylene nanocomposites

et al. 2014

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“…A argila organofílica tem duas funções opostas na estabilidade dos bionanocompósitos polímero/argila: uma, é o efeito de barreira exercido pela argila, que pode melhorar a estabilidade a biodegradação e a outra, é o efeito catalítico da argila que pode acarretar a degradação da matriz polimérica diminuindo a estabilidade. Quando se adicionou pequena fração de argila organofílica na matriz polimérica a dispersão foi favorecida, mas com a adição de níveis elevados dessa argila, o efeito catalítico é predominante e a estabilidade do bionanocompósito foi diminuída [25] . Este mesmo comportamento foi observado para o sistema PHB ORG 6%.…”

Section: Perda De Massa: Método Intercalação Por Fusãounclassified

Influência da argila vermiculita brasileira na biodegradação de filmes de PHB

et al. 2015

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ResumoEste trabalho teve como objetivo preparar e avaliar filmes PHB/vermiculita natural e modificada nas quantidades em peso de 1%, 3% e 6% através dos métodos intercalação por fusão e intercalação por solução. Os bionanocompósitos obtidos pelo método intercalação por fusão foram preparados em uma extrusora monorosca e posteriormente os filmes foram moldados via compressão. Na preparação dos filmes por solução, os sistemas foram submetidos à agitação e aquecimento a 80 °C. Os sistemas foram avaliados por difração de raios-X e o comportamento de biodegradação foi avaliado de acordo com a norma ASTM G 160-03. O acompanhamento da biodegradação foi realizado por meio de inspeção visual e perda de massa. Observou-se que o percentual de argila e o método de obtenção dos filmes influenciaram na estrutura formada e na biodegradação dos sistemas. Palavras-chave: polímeros biodegradáveis, argila vermiculita, ensaio de biodegradação, bionanocompósitos. AbstractThis study aimed to prepare and to evaluate natural and modified PHB /vermiculite films in quantities of 1%, 3% and 6% by weight, through melt intercalation and solution intercalation methods. The bionanocomposites in the form of thin films, obtained by the melt intercalation method, were prepared in a single screw extruder and then molded via compression. In the preparation of the films by solution method, the systems were stirred and heated at 80 °C in the presence of the chloroform solvent. The systems were evaluated by X-ray diffraction and the degradation behavior was evaluated according to ASTM G 160-03, by visual inspection and through weight loss. It was observed that the percentage of clay and the method of obtaining of the films influenced in the structure and biodegradability of the systems.

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“…It is well known that during the ion-exchange the surface of the clay can change from hydrophilic to hydrophobic, and can be used to obtain most of polymer/clay nanocomposites. But the polarity of PE probably is too low which could indicate that the compatibility of modified MMT and PE was poor and insufficient to form a nanocomposite [15,16]. For this reason we can assume that PE-Ch7 composites are conventional microcomposites [15].…”

Section: Structure Analysismentioning

confidence: 99%

Thermal properties of nanocomposites based on polyethylene and n-heptaquinolinum modified montmorillonite

Olewnik

Garman

Piechota

et al. 2012

J Therm Anal Calorim

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The aim of the research was obtaining and application of smectic clay modifying agent. The organophilic clay is used as nanofiller in polymer nanocomposites [1]. A microwave-assisted reaction led to obtaining N-heptaquinolinum, which is amphiphilic compound, containing both hydrophobic (alkyl and aromatic) and hydrophilic sections in its structure [2]. N-heptaquinolinum was used as a montmorillonite clay modifying agent. Modification was carried out in formulated way [3,4]. Modification efficiency was determined by X-ray diffraction (XRD) analysis and elementary analysis. Organophilic clay (Ch7) was introduced, using the extrusion method, into polyethylene matrix in different mass relations (1.5, 3 and 5 %) [3]. The structure of obtained materials was studied by means of XRD and SEM. To evaluate potential applications thermal properties of received nanocomposites were tested with thermogravimetric analysis and differential scanning calorimetry. The thermal stability of PE/clay composites can be improved in the case of loading 1.5 and 5 mass%.

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Mechanical, thermal and flammability properties of polyethylene/clay nanocomposites

Cited by 336 publications

References 28 publications

Influence of intercalation methods in properties of Clay and carbon nanotube and high density polyethylene nanocomposites

Influence of intercalation methods in properties of Clay and carbon nanotube and high density polyethylene nanocomposites

Influência da argila vermiculita brasileira na biodegradação de filmes de PHB

Thermal properties of nanocomposites based on polyethylene and n-heptaquinolinum modified montmorillonite

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