Effect of gamma irradiation on the properties of natural rubber/styrene butadiene rubber blends

Moustafa, A. B.; Mounir, Rania; Miligy, A. A. El; Mohamed, Maysa A.

doi:10.1016/j.arabjc.2011.02.020

Cited by 30 publications

(19 citation statements)

References 16 publications

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“…On the other hand, NR is categorized as a radiation crosslinking type of polymer as it contains a double bond in the basic cis 1,4 polyisoprene unit. NR shows a linear increase in the tensile modulus as the irradiation dose increases from 0 to 250 kGy, primarily due to an increase in the crosslinking density as verified by Moustafa et al (2016) .…”

Section: Introductionmentioning

confidence: 73%

Gamma irradiation influence on mechanical, thermal and conductivity properties of hybrid carbon nanotubes/montmorillonite nanocomposites

Tarawneh

Saraireh

Chen

et al. 2021

Radiation Physics and Chemistry

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A thermoplastic elastomer (TPE) based nanocomposite with the same weight ratio of hybrid nanofillers composed of carbon nanotubes (CNTs) and montmorillonite nanoclay (DK4) was prepared using a melt blending technique with an internal mixer. The TPE composite was blended from polylactic acid (PLA), liquid natural rubber (LNR) as a compatibilizer and natural rubber (NR) in a volume ratio of 70:10:20, respectively. The weight ratio of CNTs and DK4 was 2.5 wt%. The prepared samples were exposed to gamma radiation at range of 0–250 kGy. After exposure to gamma radiation, the mechanical, thermo-mechanical, thermal and electrical conductivity properties of the composites were significantly higher than unirradiated TPE composites as the irradiation doses increased up to 150 kGy. Transmission electron microscopy (TEM) micrographs revealed the good distribution and interaction between the nano-fillers and the matrix in the prepared TPE hybrid nanocomposites. In summary, the findings from this work definite that gamma irradiation might be a viable treatment to improve the properties of TPE nanocomposite for electronic packaging applications.

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Section: Introductionmentioning

confidence: 73%

Gamma irradiation influence on mechanical, thermal and conductivity properties of hybrid carbon nanotubes/montmorillonite nanocomposites

Tarawneh

Saraireh

Chen

et al. 2021

Radiation Physics and Chemistry

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“…Figure represents the variation of the elongation at break of the investigated sample B3 after being subjected to different gamma irradiation doses. From the figure it can be observed that the values of elongation at break decrease with increasing gamma irradiation dose, this may be attributed to the additional bonding between the filler and polymer due to the formation of a large number of free radicals …”

Section: Resultsmentioning

confidence: 97%

Polyvinyl chloride/ styrene butadiene rubber polymeric blend filled with bismuth subcarbonate (BiO)₂CO₃ as a shielding material for gamma rays

et al. 2019

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The polymer blend polyvinyl chloride/styrene-butadiene rubber filled of (BiO) 2 CO 3 with different concentrations (20, 30, 40, and 60 phr) were prepared by roll mill technique. The gamma-rays attenuation properties were carried out using NaI (Tl) gamma ray spectrometer using 232 Th. The attenuation coefficients, half value layer and mean free path were evaluated. The distribution of the filler within the polymer matrix was studied using scanning electron microscopy. The prepared polymer composites were characterized by X-ray diffraction technique to recognize the structural phase of the composites. The hardness and tensile strength of the composites were tested. The tensile strength of the composites was found to be enhanced in the presence of the bismuth subcarbonate filler with a slight decrease when the concentration of the filler exceeds to 40 phr. Attenuation results reveal that, the shielding efficiency increases with the increase of the filler concentration and are comparable to those of the conventional bismuth-polymer shielding materials. Hence, the composites filled (BiO) 2 CO 3 can be used for gamma ray shielding applications. The sample of 40 phr was subjected to gamma irradiation at doses from 30 up to 100 kGy. The dielectric and mechanical properties were investigated as a function of irradiation dose and filler concentrations. It was found that the irradiation dose up to 30 kGy causes an increase in the tensile strength and hardness. There is a remarkable decrease in dielectric constants at irradiation dose from 70 to 100 kGy. The dielectric constants decreased as the concentration of (BiO) 2 CO 3 increased. K E Y W O R D Sbismuth subcarbonate (BiO) 2

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“…Crosslink density is an important factor affecting the thermal stability of vulcanized rubber. Higher crosslink density leads to better thermal stability because of the higher values of activation energy needed for thermal decomposition of vulcanizates . Bauera et al reported a significant enhancement in thermal stability of the polymeric matrices filled with the nanotubes, compared to unfilled ones.…”

Section: Resultsmentioning

confidence: 99%

Evaluation of mechanical, thermal, electrical, and transport properties of MWCNT‐filled NR/NBR blend composites

Thomas

George²

2017

Polymer Engineering & Sci

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Carbon nanotube based polymer nanocomposites found versatile applications and hence studying its reinforcing effect on NR/NBR blend system is a promising step in developing flexible elastomer gadgets. In this study, attempts have been made to prepare multi-walled carbon nanotube (MWCNT)-filled nanocomposites of NR/NBR blends. Raman spectra and transmission electron microscopic analysis indicate that there has been a finer and uniform dispersion of carbon nanotubes within the polymer matrix. Mechanical properties like tensile strength, tear resistance, abrasion loss and compression set of pure and blend samples showed an improvement with the increase in the dosage of MWCNT from 0.5 to 4 phr. 70/30 NR/NBR blend with 4 phr of MWCNT showed an improvement of 83% in tensile strength and 72% in tear strength compared to pure NBR. This is attributed to the uniform dispersion, high surface area, nano level interaction, and compatibility of MWCNT with the polymeric molecular chains. MWCNT is acting as a compatibilizing agent as is manifest from the increased negative values of free energy. Electrical conduction and thermal stability of the mixes were increased with the concentration of MWCNT due to the increase in the interfacial interaction resulting from the pi-pi interaction with the nanotubes. POLYM. ENG. SCI., 58:961-972, 2018. V C 2017 Society of Plastics Engineers CHARACTERIZATION PROCEDURES Evaluation of Cure PropertiesThe optimum cure time (t 90 ) of the mixes (time to reach 90% of maximum torque) was determined on a Gottfert

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Effect of gamma irradiation on the properties of natural rubber/styrene butadiene rubber blends

Cited by 30 publications

References 16 publications

Gamma irradiation influence on mechanical, thermal and conductivity properties of hybrid carbon nanotubes/montmorillonite nanocomposites

Gamma irradiation influence on mechanical, thermal and conductivity properties of hybrid carbon nanotubes/montmorillonite nanocomposites

Polyvinyl chloride/ styrene butadiene rubber polymeric blend filled with bismuth subcarbonate (BiO)₂CO₃ as a shielding material for gamma rays

Evaluation of mechanical, thermal, electrical, and transport properties of MWCNT‐filled NR/NBR blend composites

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Effect of gamma irradiation on the properties of natural rubber/styrene butadiene rubber blends

Cited by 30 publications

References 16 publications

Gamma irradiation influence on mechanical, thermal and conductivity properties of hybrid carbon nanotubes/montmorillonite nanocomposites

Gamma irradiation influence on mechanical, thermal and conductivity properties of hybrid carbon nanotubes/montmorillonite nanocomposites

Polyvinyl chloride/ styrene butadiene rubber polymeric blend filled with bismuth subcarbonate (BiO)2CO3 as a shielding material for gamma rays

Evaluation of mechanical, thermal, electrical, and transport properties of MWCNT‐filled NR/NBR blend composites

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Polyvinyl chloride/ styrene butadiene rubber polymeric blend filled with bismuth subcarbonate (BiO)₂CO₃ as a shielding material for gamma rays