Rheological, Thermal and Dynamic Mechanical Studies of the Ldpe/Perlite Nanocomposites

Sahraeian, Razi; Esfandeh, Masoud; Hashemi, S.A.

doi:10.1177/096739111302100406

Cited by 20 publications

(12 citation statements)

References 22 publications

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“…Sahraeian et al performed the production of low density polyethylene (LDPE) based composites melt blended with perlite. They postulated that increases in mechanical, morphological, dynamic mechanical and thermal properties were observed after surface treatment of PER particles [19][20][21]. Several research groups conducted works dealing with PER filled polypropylene (PP) composites.…”

Section: Introductionmentioning

confidence: 99%

Mechanical, thermo-mechanical and morphological characterization of ABS based composites loaded with perlite mineral

Alghadi

Tirkeş

Tayfun³

2019

Mater. Res. Express

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Acrylonitrile-butadiene-styrene (ABS) copolymer was filled with perlite mineral (PER) at four different loading level of 2.5%, 5%, 10% and 15%. ABS/PER composites were produced using labscale micro-compounder followed by injection molding process. Mechanical, thermo-mechanical, melt-flow and morphological properties of composites were reported by tensile and impact tests, dynamic mechanical analysis (DMA), melt flow index (MFI) test and scanning electron microscopy (SEM), respectively. Mechanical characterizations revealed that tensile strength, elongation and Youngs' modulus of ABS were improved by PER inclusions. However, impact strength of ABS reduced with increase of PER concentration. Glass transition temperature of ABS displayed increasing trend for %5 concentration of PER. MFI test implied that PER addition caused slight decreasing for MFI value of unfilled ABS. Homogeneous dispersion of PER particles into ABS matrix for their lower loading level was obtained from SEM micrographs of composites. According to findings, 5% PER containing sample exhibited the best performance and it was remarked as the most suitable candidate among fabricated ABS based composites.

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Section: Introductionmentioning

confidence: 99%

Mechanical, thermo-mechanical and morphological characterization of ABS based composites loaded with perlite mineral

Alghadi

Tirkeş

Tayfun³

2019

Mater. Res. Express

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“…Consequently, it minimizes the pyrolysis of internal layers and, this way, the thermal protection consumption. These results demonstrate that PExp has potential to substitute asbestos in insulating materials 42,48 .…”

Section: Ablative Propertiesmentioning

confidence: 56%

“…Furthermore, increasing the PExp concentration affects significantly the density due to its content, porosity and to the low granulometry of the perlite 41,42,48 . Even so, the density of the TPS PExp samples showed lower results than the TPS reference.…”

Section: Mechanical Properties and Densitymentioning

confidence: 99%

“…Results of the PExp samples, Figure 9 and Tables 4 and 5, are in agreement with the literature 14 , to diminish the ablation rate and thus increase the burn time it is a requirement to create a stable char layer. This layer in the surface reduces the heat flow, the oxygen diffusion, and consequently the thermal degradation of the material more internal layers 42,48 . According to Sheu 51 , the use of asbestos fibers in the reference material helps the anchoring of the char layer during the pyrolysis process of the organic matter.…”

Section: Ablative Propertiesmentioning

confidence: 99%

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Development of Asbestos-free and Environment-Friendly Thermal Protection for Aerospace Application

et al. 2018

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Thermal protection systems (TPS) are components designed to protect the internal and external areas of a rocket motor from high temperatures. There has been studies in Brazil of resin-based polybutadiene hydroxylated (HTPB) loaded with asbestos since the 1970s. Nevertheless, asbestos has been banned in several countries because it is severely harmful to the human health. In this context, the development of asbestos free in flexible thermal protection (FTP) is extremely important. This study evaluates the use of Expanded Perlite (PExp) as an asbestos substitute. Lower densities were observed, which become a very interesting achievement for the aerospace field. Samples with 5 phr of Expanded Perlite showed similar results when comparing with 47 phr of fillers in PTF reference on oxy-acetylene torch test, and a reduction about 20 % of mass loss rate in test with solid propellant, thus showing that Expanded Perlite can replace asbestos in FTP. Figure 1. Components of a rocket motor 15 .

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“…As with VMT, when subjected to thermal treatment PT particles expand up to 20 times in volume, due to the water vaporization [25]. Applications of polyethylene prepared with the addition of PT have been reported previously [26,27]. Recently, Karaca et al [28] showed that PT enhanced the thermal stability and sound absorption coefficients of polyesters.…”

mentioning

confidence: 99%

Characterization of Ethylene–propylene Composites Filled with Perlite and Vermiculite Minerals: Mechanical, Barrier, and Flammability Properties

et al. 2020

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Perlite and vermiculite are naturally occurring minerals, commonly used by industry to obtain highly thermoisolative and/or non-flammable materials. However, there has been little research into the preparation and application of rubber compounds containing these inexpensive mineral fillers. Here, we show the benefits of perlite and vermiculite minerals as fillers for ethylene-propylene rubber (EPM) composites. To obtain more uniform dispersion and improved compatibility between the minerals and the elastomer matrix, 1-allyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (AMIMTFSI) and 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (BMIMTFSI) imidazolium ionic liquids (ILs) were added. The mineral fillers were found to be attractive semi-reinforcing fillers, which also act as flame retardants in the elastomer composites. Furthermore, a higher content of vermiculite mineral significantly reduced the air permeability of the composites. The incorporation of ionic liquids into the EPM-filled systems had a considerable effect on the torque increment, crosslink density, and more importantly the flammability of the studied compounds. The application of 2.5 parts per hundred parts of rubber (phr) BMIMTFSI, in particular, reduced the flammability of the EPM composite, as the maximum heat release rate (HRRmax) decreased from 189.7 kW/m2 to 170.2 kW/m2.

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Rheological, Thermal and Dynamic Mechanical Studies of the Ldpe/Perlite Nanocomposites

Cited by 20 publications

References 22 publications

Mechanical, thermo-mechanical and morphological characterization of ABS based composites loaded with perlite mineral

Mechanical, thermo-mechanical and morphological characterization of ABS based composites loaded with perlite mineral

Development of Asbestos-free and Environment-Friendly Thermal Protection for Aerospace Application

Characterization of Ethylene–propylene Composites Filled with Perlite and Vermiculite Minerals: Mechanical, Barrier, and Flammability Properties

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