Nanocomposite materials based on polyurethane intercalated into montmorillonite clay

Rehab, Ahmed; Salahuddin, Nehal

doi:10.1016/j.msea.2005.04.019

Cited by 151 publications

(80 citation statements)

References 33 publications

(33 reference statements)

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“…However due to the need for use solvent, this technique can not be applied in industry. The nanocomposite preparation by emulsion polymerization, with the clays dispersed in the aqueous solution, is also categorized as solvent intercalation method (Rehab & Salahuddin, 2005). Toyota group has been used this technique to produce polyimide/clay nanocomposites (Yano et al, 1993).…”

Section: Solution Intercalationmentioning

confidence: 99%

Polymer/Clay Nanocomposites

Salavati‐Niasari¹,

Ghanbari²

2011

Advances in Diverse Industrial Applications of Nanocomposites

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Section: Solution Intercalationmentioning

confidence: 99%

Polymer/Clay Nanocomposites

Salavati‐Niasari¹,

Ghanbari²

2011

Advances in Diverse Industrial Applications of Nanocomposites

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“…Observou-se uma uniformidade dos pontos de silício, indicando que a argila está dispersa na matriz polimérica de maneira homogênea e em escala micrométrica. Rehab e colaboradores obtiveram resultado similar em nanocompósitos de PU/MMT [23]. Esse resultado é corroborado pela análise de difração de raios X, que evidenciou a intercalação do polímero nas galerias da argila.…”

Section: Materiaisunclassified

Mechanical and Thermal Properties and Morphology of Thermoplastic Polyurethane (TPU)/Clay Composites

et al. 2015

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ResumoNeste trabalho, compósitos de elastômero termoplástico de poliuretano (TPU) foram preparados com diferentes teores de argila (1, 3 e 10% m/m). A argila Cloisite  30B (C30B) foi incorporada na matriz de TPU via processamento por fusão em uma extrusora de dupla rosca. O método de síntese do TPU foi a polimerização em duas etapas do poliol poliéster e do di-isocianato de 4,4' difenil metano com butano-1,4-diol como extensor de cadeia. A dispersão da argila e seu efeito sobre as propriedades mecânicas e térmicas dos compósitos foram investigadas. A caracterização dos compósitos de TPU com argila foi realizada por meio das análises de microscopia eletrônica de varredura, microanálise de energia dispersiva e difração de raios X. As propriedades mecânicas foram avaliadas através da resistência à tração. O TPU com 3% m/m de argila apresentou os melhores resultados com aumento nos valores de tensão e alongamento na ruptura (28% e 35%, respectivamente), quando comparado ao TPU puro (amostra sem argila). As análises de calorimetria diferencial de varredura e termogravimetria, para os compósitos, indicaram que a argila não afetou significativamente as temperaturas de transição vítrea, de fusão e de degradação da matriz polimérica, mas restringe o movimento molecular. Palavras-chavePoliuretano, Argila, Compósitos, Morfologia, Propriedades Mecânicas, Propriedades Térmicas Mechanical and Thermal Properties and Morphology of Thermoplastic Polyurethane (TPU)/Clay CompositesAbstract In this study, thermoplastic polyurethane (TPU) composites were prepared with different nanoclay contents (1, 3 and 10 wt%). The nanoclay Cloisite  30B (C30B) was dispersed in the TPU matrix by melt processing using a twin-screw extruder. The synthesis method of TPU involved the two-step bulk polymerization of polyesterpolyol and 4,4' diphenylmethanediisocyanate with butane-1,4-diol as the chain extender. The dispersion of the nanoclay particles and its effect on the mechanical and thermal properties of the composites was investigated. The characterization of TPU/nanoclay composites was carried out by means of scanning electron microscopy, energy dispersion microanalysis and X ray diffraction. The mechanical characterization was performed through determination of the tensile strength. The TPU 3 wt% composite showed the best improvement with increases in stress and tensile at break (28% and 35%, respectively), compared to the neat TPU (sample without nanoclay). The differential scanning calorimetry and thermogravimetry analyses for composites indicated that the nanoclay did not affect significantly the glass transition, melt, and degradation temperatures of the polymeric matrix, but reduces the molecular mobility.

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“…The spectra of nanocomposites which are modified with copper and iron shows that the NH stretch band near 3000 to 3500 cm cm -1 are shifted substantially to regions associated with + NH 3 vibration which facilitate the ion exchange with MMT [13].…”

Section: A Ftir Analysismentioning

confidence: 99%

Gas Permeability Properties of Thermoplastic Polyurethane Modified Clay Nanocomposites

Shamini¹,

Yusoh²

2014

IJCEA

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Abstract-Interest in polymer nanocomposites bloomed over the last decades due to its unusual property improvements. A novel nanocomposite consisting of Na + montmorillonite nanoclay and polyurethane nanocomposite was successfully prepared using solution intercalation method. Nanoclay was modified using transition metal ions which were copper (II) chloride and iron (III) chloride to achieve good dispersion and to reduce clay agglomerations. The modification process proved to be successful through SEM micrographs. Gas permeability test was carried out in a Membrane Separation Testing Unit. Significant improvements in barrier properties were observed with the addition of modified montmorillonite. A remarkable four fold decrease was seen in polyurethane incorporated with 1% modified iron followed by a nearly threefold decrease in polyurethane incorporated with 1% modified copper when tested with oxygen gas. Polyurethane incorporated with 1% modified iron and copper also showed dramatic decreases of 60% and 50% respectively when tested with nitrogen gas.

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Nanocomposite materials based on polyurethane intercalated into montmorillonite clay

Cited by 151 publications

References 33 publications

Polymer/Clay Nanocomposites

Polymer/Clay Nanocomposites

Mechanical and Thermal Properties and Morphology of Thermoplastic Polyurethane (TPU)/Clay Composites

Gas Permeability Properties of Thermoplastic Polyurethane Modified Clay Nanocomposites

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