Influence of thermal aging on pyrolysis pattern of carbon black-filled NR composite

Choi, Sung Seen; Ko, Ji Eun

doi:10.1007/bf03218819

Cited by 11 publications

(6 citation statements)

References 20 publications

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“…Mooney viscosity, bound rubber content and Payne effect For filled rubber compounds, the viscosity increment depends on several factors, to include mastication time [29], mixing time [30], filler types [31,32], filler contents [32,33], compatibilizer or coupling [36]. The change of compound viscosity is strongly influenced by the levels of filler-filler and filler-rubber interactions which consequently have an influence on the final properties of the filled rubber.…”

Section: Effect Of Silane-grafted-nr Asmentioning

confidence: 99%

Silane grafted natural rubber and its compatibilization effect on silica-reinforced rubber tire compounds

Sengloyluan¹,

Sahakaro²,

Dierkes³

et al. 2017

Express Polym. Lett.

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Abstract. Natural Rubber (NR) grafted with 3-octanoylthio-1-propyltriethoxysilane (NXT) was prepared by melt mixing using 1,1′-di(tert-butylperoxy)-3,3,5-trimethylcyclohexane as initiator at 140°C with NXT contents of 10 and 20 parts per hundred rubber [phr] and initiator 0.1 phr. The silane grafted on NR molecules was confirmed by Fourier transform infrared (FTIR), proton nuclear magnetic resonance ( 1 H-NMR) and scanning electron microscopy/energy dispersive X-ray spectroscopy (SEM-EDX). Based on 1 H-NMR, the use of 10 and 20 phr (parts per hundred resin) of silane resulted in grafted NXT onto NR of 0.66 and 1.32 mol%, respectively, or a grafting efficiency of approx.38%. The use of NXT-grafted NR as compatibilizer in silica-filled NR compounds, to give a total amount of NXT in both grafted and non-grafted forms in the range of 0.8-6.1 wt% relative to the silica, decreases the Mooney viscosity and Payne effect of the compounds, improves filler-rubber interaction, and significantly increases the tensile properties of the silica-filled NR-compounds compared to the non-compatibilized one. At the same silane-content, the use of silane-grafted NR gives slightly better properties than the straight use of the same silane. With sulfur compensation, the use of NXT-grafted-NR with about 6 wt% NXT relative to the silica gives technical properties that reach the levels obtained for straight use of bis-(3-triethoxysilyl-propyl)tetrasulfide (TESPT) at 8.6 wt% relative to the silica.

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Section: Effect Of Silane-grafted-nr Asmentioning

confidence: 99%

Silane grafted natural rubber and its compatibilization effect on silica-reinforced rubber tire compounds

Sengloyluan¹,

Sahakaro²,

Dierkes³

et al. 2017

Express Polym. Lett.

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“…Py-GC chromatograms of the TRWPs separated from the RD2, RD3, and RD4 samples showed similar pyrolysis products, as shown in Figure 10 . The major pyrolysis products were isoprene and dipentene which are the key pyrolysis products of natural rubber (NR) [ 13 , 14 , 15 , 16 ]. Since bus tire treads are mainly made of NR [ 17 , 18 , 19 , 20 ], the TRWPs should come from abrasion of bus tire treads.…”

Section: Resultsmentioning

confidence: 99%

Classification and Characterization of Tire-Road Wear Particles in Road Dust by Density

Jung

Choi

2022

Polymers

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Tire treads are abraded by friction with the road surface, producing tire tread wear particles (TWPs). TWPs combined with other particles on the road such as road wear particles (RWPs) and mineral particles (MPs), forming tire-road wear particles (TRWPs). Dust on an asphalt pavement road is composed of various components such as TRWPs, asphalt pavement wear particles (APWPs), MPs, plant-related particles (PRPs), and so on. TRWPs have been considered as one of major contaminants produced by driving and their properties are important for study on real abrasion behaviors of tire treads during driving as well as environmental contamination. Densities of the TRWPs are totally dependent on the amount of the other components deposited in the TWPs. In this study, a classification method of TRWPs in the road dust was developed using density separation and the classified TRWPs were characterized using image analysis and pyrolytic technique. Chloroform was used to remove APWPs from mixture of TRWPs and APWPs. TRWPs were found in the density range of 1.20–1.70 g/cm3. By decreasing the particle size of the road dust, the TRWP content in the road dust increased and its density slightly tended to increase. Aspect ratios of the TRWPs varied and there were many TRWPs with low aspect ratio below 2.0. The aspect ratio range was 1.2–5.2. Rubber compositions of the TRWPs were found to be mainly NR/SBR biblend or NR/BR/SBR triblend.

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“…The principal pyrolysis products of NR were isoprene and dipentene, corresponding to the monomer and dimer of the repeat unit (isoprene), respectively, because NR is a polymer of isoprene, and the key pyrolysis products of isoprene and dipentene are the monomer and dimer of the repeat unit [ 31 , 32 , 33 ]. The isoprene and dipentene were detected as main pyrolysis products in the PM samples.…”

Section: Resultsmentioning

confidence: 99%

Analysis of Polymeric Components in Particulate Matter Using Pyrolysis-Gas Chromatography/Mass Spectrometry

Chae

Choi

2022

Polymers

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Particulate matters (PMs) such as PM10 and PM2.5 were collected at a bus stop and were analyzed using pyrolysis-gas chromatography/mass spectrometry to identify organic polymeric materials in them. The major pyrolysis products of the PM samples were isoprene, toluene, styrene, dipentene, and 1-alkenes. The pyrolysis products generated from the PM samples were identified using reference polymeric samples such as common rubbers (natural rubber, butadiene rubber, and styrene-butadiene rubber), common plastics (polyethylene, polypropylene, polystyrene, and poly(ethylene terephthalate)), plant-related components (bark, wood, and leaf), and bitumen. The major sources of the principal polymeric materials in the PM samples were found to be the abrasion of the tire tread and asphalt pavement, plant-related components, and lint from polyester fabric. The particles produced by the abrasion of the tire tread and asphalt pavement on the road were non-exhaustive sources, while the plant-related components and lint from polyester fabric were inflowed from the outside.

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Influence of thermal aging on pyrolysis pattern of carbon black-filled NR composite

Cited by 11 publications

References 20 publications

Silane grafted natural rubber and its compatibilization effect on silica-reinforced rubber tire compounds

Silane grafted natural rubber and its compatibilization effect on silica-reinforced rubber tire compounds

Classification and Characterization of Tire-Road Wear Particles in Road Dust by Density

Analysis of Polymeric Components in Particulate Matter Using Pyrolysis-Gas Chromatography/Mass Spectrometry

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