Molecular transport of aromatic solvents through microcomposites of natural rubber (NR), carboxylated styrene butadiene rubber (XSBR) and their blends

Stephen, Ranimol; Joseph, Kuruvilla; Oommen, Zachariah; Thomas, Sabu

doi:10.1016/j.compscitech.2006.05.009

Cited by 52 publications

(33 citation statements)

References 32 publications

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“…The selection of the solvent was done considering the matrix and its final application, not the filler The sorption tests ( Figure 7) demonstrate that the maximum weight gain is obtained for the unfilled XSBR matrix, while the decreasing slope in the curve (weight gain vs time 1/2 ) is an indication of the effectiveness of the chitin as a barrier to the solvent uptake. In general, it has been shown already as XSBR samples filled with clay or silica micronsized fillers showed reduced swelling rate owing to the tortuosity of the path [32]. The same result can be observed in experiment limited at 48 hours, point at which the systems start to lose their shape and going into solution due to the unvulcanized state of the rubber: the scattering of the different curves in Figure 7a is due to this condition.…”

Section: Resultssupporting

confidence: 70%

Mechanical and thermal properties of crab chitin reinforced carboxylated SBR composites

Visakh¹,

Monti²,

Puglia³

et al. 2012

Express Polym. Lett.

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The addition of small amounts (up to 9 wt%) of chitin microsized particles, originating from shellfish waste, to carboxylated styrene-butadiene rubber (XSBR) matrix (as received and annealed to 100°C) has been studied. In particular, this study concentrated on their mechanical (creep investigation by nanoindentation and dynamical-mechanical analysis), thermal (differential scanning calorimetry and thermogravimetry) and swelling behaviour (toluene absorption) and was completed by morphological characterisation by scanning electron microscopy and atomic force microscopy. The results show that annealing has a limited effect on materials properties, effects which are further reduced by the addition of growing amounts of crab chitin. It should be noted that the limited filler content used in the study does not substantially modify the linear creep behaviour of XSBR for sufficiently long loading times. The thermal stability of the system does also appear to be preserved even with the maximum chitin content added, while it serves sufficiently as an effective barrier against aromatic solvent absorption. © BME-PT

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Section: Resultssupporting

confidence: 70%

Mechanical and thermal properties of crab chitin reinforced carboxylated SBR composites

Visakh¹,

Monti²,

Puglia³

et al. 2012

Express Polym. Lett.

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“…Our results agree with the findings of some researchers that used the same type of aromatic solvents [31,32,38,39]. Although several researchers have reported the increase in solvent uptake with decreasing penetrant size [22,38,40,41]. They linked this behaviour on the grounds of free volume theory in which the diffusion rate of solvents through polymers depends on the rate with which the polymer chain segments exchange their positions with solvents.…”

Section: Effect Of Penetrant Size On Q Tsupporting

confidence: 83%

Organic Solvents Transport Through Alkali-Treated Agro-waste Microfibre Incorporated with Low Density Polyethylene Composites

Obasi¹

2017

AJPST

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Abstract:We report the transport behaviour of low density polyethylene composites containing both untreated and alkalitreated agro-waste microfibre in three aromatic organic solvents (benzene, toluene, and xylene) at 40, 60 and 80°C by the conventional weight-gain method. The effects of fibre content, alkali treatment, and filler particle size on solvent sorption were analysed. Transport parameters such as diffusion coefficient, sorption coefficient, and permeation coefficient have been calculated in terms of microfibre content, particle size, nature of the solvent, and temperature. It was observed that all the systems follow the Fickian mode of transport on increasing temperature. The van't Hoff's relationship was used to determine the thermodynamic parameters and was found that the estimated free energies of sorption were all positive, indicating nonspontaneity of the solubility of micro fibre/LDPE composites. The first order kinetic rate constant and swelling parameters were also evaluated.

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“…Finally, at equilibrium, the concentration gradient becomes zero. [39] The addition of filler reduces the swelling rate. The polar hydroxyl groups on the filler surface resist the uptake of nonpolar solvent.…”

Section: Swelling Behaviormentioning

confidence: 99%

Carboxylated acrylo nitrile butadiene rubber latex/kaolin nanocomposites: preparation and properties

Nair

Joseph

2014

Composite Interfaces

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Carboxylated nitrile butadiene rubber (XNBR)-based nanocomposites with varying amounts of nanokaolin were produced by latex stage mixing. Sonication of the unmodified kaolin and the technique adopted for the preparation of the composite have helped to get a uniform dispersion of clay in XNBR matrix. Nanokaolin caused enhancement in the mechanical properties of the composites. Proper dispersion of the clay particles, partial exfoliation/intercalation of clay, and interaction of clay with the polar rubber latex made nanokaolin good reinforcing filler in XNBR latex. Swelling studies conducted in methyl ethyl ketone showed a decrease in the swelling index and solvent uptake confirming the hindrance exerted by clay and the possible clay-rubber interaction. Increase in complex modulus obtained from the strain sweep analysis is a further evidence for better rubber filler interaction. The composites were characterized by the scanning electron microscopy, X-ray diffraction analysis, and atomic force microscopy.

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Molecular transport of aromatic solvents through microcomposites of natural rubber (NR), carboxylated styrene butadiene rubber (XSBR) and their blends

Cited by 52 publications

References 32 publications

Mechanical and thermal properties of crab chitin reinforced carboxylated SBR composites

Mechanical and thermal properties of crab chitin reinforced carboxylated SBR composites

Organic Solvents Transport Through Alkali-Treated Agro-waste Microfibre Incorporated with Low Density Polyethylene Composites

Carboxylated acrylo nitrile butadiene rubber latex/kaolin nanocomposites: preparation and properties

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