Radiochemical ageing of butyl rubbers for space applications

Smith, Mona; Berlioz, Sophie; Chailan, Jean‐François

doi:10.1016/j.polymdegradstab.2012.10.013

Cited by 15 publications

(8 citation statements)

References 36 publications

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“…The SEM micrographs of irradiated blends of E60CI40, E80CI20, and E100CI0 are shown in Figure (a–c), respectively. The development of crosslinking interpreted from tensile testing and sorption behavior results in homogeneity and this is seen in micrographs of pure EPDM rubber (E100CI0) and E80CI20 blend compositions …”

Section: Resultsmentioning

confidence: 96%

EPDM–chlorobutyl rubber blends in γ‐radiation and hydrocarbon environment: Mechanical, transport, and ageing behavior

Ashok

Balachandran

Lawrence

et al. 2017

J of Applied Polymer Sci

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In nuclear applications, ethylene propylene diene monomer (EPDM) rubber is the material of choice as gaskets and Orings due to its radiations resistance. In nuclear fuel reprocessing, in addition to radiation, the elastomeric components have to withstand paraffinic hydrocarbons as well. But, EPDM has poor resistance to hydrocarbons. To enhance the durability of EPDM in such environments, EPDM-chlorobutyl rubber (CIIR) blends of varying compositions were developed and characterized for mechanical, thermal, dielectric, and solvent sorption behavior. Spectroscopic and morphological analysis was used to evaluate the compatibility of blends. Due to synergistic effect, the optimal composition of blends with superior mechanical properties and solvent resistance were found to be 60% to 80% EPDM and 20% to 40% CIIR. The optimized blends were irradiated with gamma rays at cumulative doses up to 2 MGy. Based on spectroscopic, morphological, mechanical, thermogravimetric, and sorption properties, blend containing 80% EPDM was found to have superior retention of properties after irradiation.

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Section: Resultsmentioning

confidence: 96%

EPDM–chlorobutyl rubber blends in γ‐radiation and hydrocarbon environment: Mechanical, transport, and ageing behavior

Ashok

Balachandran

Lawrence

et al. 2017

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…A similar trend was reported previously by other experimentalists. 8,14,15 Nonetheless, the CB N300 composite exhibited the M cs value, which is slightly lower than that of the unfilled NR composite. The reason was due to the low aspect ratio of the CB N330 compared to the MWCNT.…”

Section: Swelling and Crosslink Density Measurement Of Nr Nanocompositementioning

confidence: 84%

“…Afterward, the samples were dried in an oven at 60 C to constant weight for the estimation of sol-gel fractions (mass fraction of rubber). 5,[14][15][16][17] The percentage swelling could be calculated using the equation below:…”

Section: Swelling and Crosslink Density Measurement Of Nr Nanocompositementioning

confidence: 99%

Influence of poly(methyl methacrylate) grafted multiwalled carbon nanotubes on the mechanical and thermal properties of natural rubber nanocomposites

Umar

Karim

Buang

et al. 2017

Journal of Composite Materials

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In this study, we describe the preparation and characterization of natural rubber nanocomposites filled with poly (methyl methacrylate) grafted multiwalled carbon nanotube. The use of various filler loadings (1, 2, 3, and 5 wt %) and melt blending method was employed. From the results, nanocomposite with 1 phr filler loading showed the optimal tensile strength of 4.92 MaP, while that of the carbon black N330 filled natural rubber with similar filler loading found to be 2.48 MaP. The nanocomposite with optimal tensile strength exhibited a good filler dispersion in the natural rubber matrix, which was depicted by the field emission scanning electron microscopy images. The thermal degradation temperature of the vulcanized neat natural rubber composite was increased from 380℃ to 462℃ with 1 phr filler loading. The polymer modified multiwalled carbon nanotube improved the mechanical and thermal properties of natural rubber, suggesting its potential as reinforcement filler in rubber industry.

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“…The crosslinking density ( n ) of the PVA nanofibers was calculated using Flory–Rehner equation [Eq. (1)]

n = \frac{- false[normalln (|, 1 - V_{r}) + V_{r} + χ {V_{normalr}}^{2}}{V true({V_{normalr}}^{\frac{1}{3}} - \frac{V_{r}}{2} true)}

…”

Section: Methodsmentioning

confidence: 99%

Antibacterial efficacy of poly(vinyl alcohol) composite nanofibers embedded with silver‐anchored silica nanoparticles

Jatoi

Lee

et al. 2017

J Biomed Mater Res

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Silver has been widely used as an effective antibacterial agent especially for treating burns and wounds. However, release of silver from materials often arouse side effects due to toxicity of silver towards mammalian cells. Argyria and argyrosis are well known problems of acute toxicity of silver towards human body. Immobilization of silver is an effective approach to reduce silver release. Herein, we present poly(vinyl alcohol) (PVA) composite nanofibers embedded with silver-anchored silica nanoparticles (SSNs) as a novel antibacterial material. Silver nanoparticles anchored on silica nanoparticles were prepared and incorporated into PVA nanofibers to fabricate silver-silica embedded PVA nanofibers (SSN-PVA) by electrospinning. Incorporation of SSNs into PVA was confirmed by TEM and SEM results revealed regular nanofibers whose diameter increased with successive addition of SSNs. The SSN-PVA nanofibers showed significant antibacterial efficacy against both Gram-negative and Gram-positive bacteria. Our research results demonstrated SSN-embedded polymeric nanofibers can open up a promising prospect for the prevention of bacterial infection in diverse biomedical fields including wound dressing. © 2017 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 106B: 1121-1128, 2018.

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Radiochemical ageing of butyl rubbers for space applications

Cited by 15 publications

References 36 publications

EPDM–chlorobutyl rubber blends in γ‐radiation and hydrocarbon environment: Mechanical, transport, and ageing behavior

EPDM–chlorobutyl rubber blends in γ‐radiation and hydrocarbon environment: Mechanical, transport, and ageing behavior

Influence of poly(methyl methacrylate) grafted multiwalled carbon nanotubes on the mechanical and thermal properties of natural rubber nanocomposites

Antibacterial efficacy of poly(vinyl alcohol) composite nanofibers embedded with silver‐anchored silica nanoparticles

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