On thermal conductivity of some fabrics

Ismaïl, Mohamed; Ammar, A.S.A.; El-Okeily, M.

doi:10.1002/app.1985.070300607

Cited by 5 publications

(4 citation statements)

References 3 publications

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“…It is well established in the literature (1)(2)(3)(4)(5)(6) that for semi and noncrystalline polymers, investigations of the thermal conductivity and of the thermal diffusivity give information about the secondary ordering phenomenon, i.e., orientation. In semicrystalline polymers, which can be treated as non-conductive crystals, the concentration of donors or acceptors is negligible.…”

Section: Introductionmentioning

confidence: 99%

Thermal diffusivity in polymers oriented uniaxially in the solid and in the molten state

Sterzyński¹,

Linster²

1987

Polymer Engineering & Sci

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Measurements of thermal diffusivity were carried out with semicrystalline and amorphous polymers stretched in the solid and in the molten state to different elongations. For semi‐crystalline materials two regions in the curves of the diffusivity versus the elongation can be detected. The change occurs at an elongation of 1.4 for the polymers stretched in the solid state and at an elongation of 3 for the polymers stretched in the molten state. For amorphous polystyrene the shape of the curves of thermal diffusivity versus elongation also depends on the mode of stretching. Along with thermal diffusivity measurements, wide angle X‐ray scattering investigations were also performed and give explanations for the differences in thermal behavior.

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Section: Introductionmentioning

confidence: 99%

Thermal diffusivity in polymers oriented uniaxially in the solid and in the molten state

Sterzyński¹,

Linster²

1987

Polymer Engineering & Sci

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“…It is clear from the figure, also, that the band between 970 and 990 cm 21 is due to the asymmetric vibration of SiAO in hydration samples. After 90 cycles, the progress of hydration is accompanied by the shift of the SiAO vibration to higher wave number (1,018 cm 21 ) which attributed to the polymerization of the SiO 4 22 units during CASAH formation [30]. The SiAO out of plane bending vibration mode occurred between 445 cm 21 and 460 cm 21 and 500 and 540 cm 21 , respectively. For the spectrum of the PCC (Fig.…”

Section: Bulk Density Porosity and Water Absorption Of The Fwfmentioning

confidence: 97%

“…It is worth to state that, all the obtained spectra showed, nearly, the same bands assignments with very small differences. The following bands could be differentiated [16,[29][30][31]: The absorption by the OH 2 in the Portlandite, Ca(OH) 2 , appears between 3,640 cm 21 and 3,642 cm 21 .…”

Section: Bulk Density Porosity and Water Absorption Of The Fwfmentioning

confidence: 99%

Immobilization of sulfate waste simulate in polymer–cement composite based on recycled expanded polystyrene foam waste: Evaluation of the final waste form under freeze–thaw treatment

Bayoumi

Tawfik

2015

Polymer Composites

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A new polymer–cement composite matrix for solidification and stabilizing of low‐ and intermediate level radioactive sulfate waste, containing high concentration of sulfate as sodium salt (113.16 g/L), had been developed at the inorganic applied chemistry unit, radioisotope department, Egyptian atomic energy authority. The proposed composite is based on ordinary Portland cement and expanded polystyrene recycled from foam wastes. The integrity of the reached final waste forms (polymer–cement composite immobilizing sulfate wastes simulate) was evaluated after subjecting to freeze–thaw (FT) treatment. The cycling was performed for the final waste form at the end of 28 days curing period between (−20°C ± 1) and (60°C ± 1) for 180 days. Mass changes, compressive strength, porosity, and bulk density were determined for the solid blocks at the end of definite increasing FT cycles. To evaluate the changes in the internal structure accompanied the FT cycling, Fourier‐transform infrared, X‐ray diffraction, thermogravimetry, and scanning electron microscopy tools were used. Based on the data obtained, it could be stated that the proposed polymer–cement composite can withstand the aggressive conditions exist during the disposal process and candidate it can be used adequately for incorporating the sulfate waste concentrate originated from the boiling water reactors. POLYM. COMPOS., 38:637–645, 2017. © 2015 Society of Plastics Engineers

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“…11 When palm oil fatty acid was used in a calcium carbonate filled natural rubber formulation, it improved the reversion behavior of the rubber compounds. 12 The free fatty acids in coconut oil marginally reduced the cure time by accelerating the vulcanization reaction. 5 Although the various vegetable oils potentially offer many advantages for rubber processing and rubber product properties, the polar nature of fatty acids in them inherently causes poor compatibility with nonpolar rubber.…”

Section: Introductionmentioning

confidence: 99%

Benzyl Esters of Vegetable Oils as Processing Oil in Carbon Black–Filled SBR Compounding: Chemical Modification, Characterization, and Performance

et al. 2015

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Three different types of benzyl ester were synthesized from vegetable oils (i.e., coconut oil, palm oil, and soybean oil). They were then utilized in styrene butadiene rubber (SBR) compound reinforced with carbon black. First, the benzyl esters were investigated by varying the molar ratio of fatty acids in vegetable oil to benzyl alcohol, the catalyst concentration, the reaction time, and the reaction temperature, observing the yield of benzyl ester. Then SBR was compounded with the benzyl esters, observing cure characteristics, mechanical properties, and morphologies of the SBR compounds, with the control compound containing conventional aromatic oil. The highest 96% yield of benzyl ester was obtained with palm oil fatty acid. Furthermore, the benzyl ester oils consumed less energy during processing but gave comparable carbon black dispersion, in comparison with the conventional aromatic oil. C

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On thermal conductivity of some fabrics

Cited by 5 publications

References 3 publications

Thermal diffusivity in polymers oriented uniaxially in the solid and in the molten state

Thermal diffusivity in polymers oriented uniaxially in the solid and in the molten state

Immobilization of sulfate waste simulate in polymer–cement composite based on recycled expanded polystyrene foam waste: Evaluation of the final waste form under freeze–thaw treatment

Benzyl Esters of Vegetable Oils as Processing Oil in Carbon Black–Filled SBR Compounding: Chemical Modification, Characterization, and Performance

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