A nanocomposite based on a styrene-acrylate copolymer and native montmorillonite clay 2. Modeling the elastic properties

Maksimov, R. D.; Gaidukovs, Sergejs; Kalniņš, Mārtiņš; Zicāns, Jānis; Plume, É. Z.

doi:10.1007/s11029-006-0027-2

Cited by 18 publications

(15 citation statements)

References 11 publications

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“…The thermal degradation of the modifier used proceeds by Hofman's elimination or nucleophilic substitution S N 2. Depending on the structure of the carbon chain attached to the nitrogen atom in the ammonium salts used (Table 1), this process is recorded in the TG curves of nanocomposites at DT 2 = 180-300°C [6]. The maximal thermal decomposition rate of the organically modified laminar silicates (OLS) occurs at a temperature of 240°C (Fig.…”

Section: Resultsmentioning

confidence: 99%

“…The presence of the acidic proton, H ? , influences the degradation and cyclization of the nanocomposite at elevated temperatures [6,22,23]. With increasing temperature up to 300-500°C, (DT 3 ), organic compounds with a higher molecular weight are also desorbed from the surface of aluminosilicate.…”

Section: Resultsmentioning

confidence: 99%

“…For this reason clay must be modified with a surfactant in order to make the gallery space sufficiently hydrophobic to permit it to interact with the polymer. The most commonly used surfactants are primary, secondary, tertiary, and quaternary alkylammonium or alkylphosphonium cations [6,7].…”

Section: Introductionmentioning

confidence: 99%

“…The current researches of PCL mainly focus on the effect of manufacturing method, microstructure, and organic treatment of clay and residue investigation on flame retarded properties [4][5][6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

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Thermal stability and flammability of butadiene–styrene rubber nanocomposites

Rybiński

Janowska

Jóźwiak

et al. 2012

J Therm Anal Calorim

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This paper presents the effect of halloysite intercalated with a base or modified montmorillonite on the thermal properties and flammability of peroxide and sulfur vulcanizates of styrene-butadiene rubber (SBR). Based on the test results obtained by means of thermal analyses (DTA, TG, DTG, and DSC), oxygen index and microcalorimeter (FAA) it has been found that the thermal stability and flammability of the nanocomposites investigated depend on the spatial network structure as well as the content and type of nanoadditive in the vulcanizate obtained. The nanofillers used considerably reduce the flammability and fire hazard of the cross-linked SBR.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Thermal stability and flammability of butadiene–styrene rubber nanocomposites

Rybiński

Janowska

Jóźwiak

et al. 2012

J Therm Anal Calorim

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“…This type of nonlinearity is characterized by a fast increase in the elastic modulus (at small values of W f ) with subsequent gradual retardation (and sometimes even reduction) of growth in the modulus upon introduction of ММТ in amounts exceeding 1-3%. This type of the relationship E W ( ) f was revealed in many studies when investigating such composites with different polymeric matrices [see, for example, [1][2][3][4][5][6][7]. In [3], it was concluded that the optimum content of ММТ in the polyurethane tested was 3%; with increase in W f , the modulus E decreased considerably.…”

mentioning

confidence: 80%

Elastic Properties of a Polymer/Silicate Composite with Platelike Multilayer Filler Particles

Maksimov

Plume

2014

Mech Compos Mater

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A variant of stepwise calculations of the elastic constants of a composite containing platelike multilayer filler particles is presented. First, the effective characteristics of unexfoliated particles in the form of multilayer stacks with interlaminar galleries enlarged as a result of intercalation of polymer are determined. Then, the independent elastic constants of the transversely isotropic representative structural elements of a composite in which multilayer particles are located strictly coplanarly, i.e., parallel to each other, are calculated. Finally, the elastic constants of a composite with randomly oriented particles are obtained by using the method of orientational averaging. Data on the influence of the number of monolayers in the unexfoliated silicate filler particles on their reinforcing efficiency are reported and discussed.

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Experimental characterization and modeling stiffness of polymer/clay nanocomposites within a hierarchical multiscale framework

Mesbah

Zaïri

Boutaleb

et al. 2009

J of Applied Polymer Sci

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To provide a better understanding of the relationship between nanostructure and overall material stiffness in the case of polymer/clay nanocomposites, both analytical and finite element modeling were considered. A micromechanical analytical approach based on a multiscale framework is presented in which special attention is devoted to the constrained region around reinforcements. The thickness of the constrained region is seen as a characteristic length scale and the effect of particle size is explicitly introduced in the model. Moreover, the constrained region presents graded properties. The hierarchical morphology of intercalated silicate stacks is also explicitly introduced in the micromechanical model from an equivalent stiffness method in which the silicate stacks are replaced by homogeneous particles with constructed equivalent anisotropic stiffness. The orientational averaging process is used to derive the overall stiffness tensor of nanocomposite materials containing randomly oriented reinforcements. The respective influence of volume fraction, aspect ratio, size and orientation of the reinforcements, matrix properties, number of silicate layers per stack, and interlayer spacing on the overall nanocomposite stiffness is analyzed. The overall stiffness of polymer/clay nanocomposite systems is also evaluated by means of finite element simulations and the results compare favorably with model predictions. From an experimental point of view, relevant morphological and mechanical data were obtained on polyamide-6 nanocomposites prepared using a modified montmorillonite Cloisite 30B and an unmodified sodium montmorillonite Cloisite Na þ . The amount of constrained region around reinforcements was estimated using results issued from dynamic mechanical analyses and differential scanning calorimetry. Comparison to the model clearly underlines the contribution of the constrained region to the stiffness improvement.

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A nanocomposite based on a styrene-acrylate copolymer and native montmorillonite clay 2. Modeling the elastic properties

Cited by 18 publications

References 11 publications

Thermal stability and flammability of butadiene–styrene rubber nanocomposites

Thermal stability and flammability of butadiene–styrene rubber nanocomposites

Elastic Properties of a Polymer/Silicate Composite with Platelike Multilayer Filler Particles

Experimental characterization and modeling stiffness of polymer/clay nanocomposites within a hierarchical multiscale framework

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