Degradation of styrene butadiene rubber (SBR) in anaerobic conditions

Vernáez, Oscar; Dagréou, Sylvie; Grassl, Bruno; Müller, Alejandro J.

doi:10.1016/j.polymdegradstab.2014.11.006

Cited by 11 publications

(11 citation statements)

References 22 publications

(25 reference statements)

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“…In a previous work, termination reactions were prevented by diluting the polymer solution, and degradation reactions of the polymer chains were observed by β‐scission reactions. Relaxation time spectra were calculated for the three formulations at 480 min and are shown in Figure .…”

Section: Resultsmentioning

confidence: 99%

“…In some applications, hydroperoxides can be used as a crosslinking agent, because they can form peroxyl radicals from homolytic decomposition. Vernáez et al have demonstrated that hydroperoxide degrades SBR in dilute solution by a random scission mechanism. Degradation starts at the beginning of the reaction and degradation rate depends on polymer molecular weight.…”

Section: Resultsmentioning

confidence: 99%

“…The effect of this solvent quality on the degradation of SBR has been studied in a previous work . In that work, it was demonstrated that Copesol® retards degradation reactions.…”

Section: Resultsmentioning

confidence: 99%

“…Cold emulsion polymerized styrene‐butadiene rubber (SBR‐8113) from ISP was used. It has the following values for weight and number average molecular weights, as determined by GPC: M w = 247 ± 36 kg mol −1 and M n = 171 ± 45 kg mol −1 . Additives were removed by dissolving the polymer in toluene, following by precipitation with 1‐propanol and further soxhlet solvent extraction.…”

Section: Methodsmentioning

confidence: 99%

“…For dilute polymer solutions, it has been demonstrated that the use of hydroperoxides as degradation agents leads to β‐scission degradation reactions . It can be assumed that hydroxyl radicals abstract specific hydrogen atoms from the polymer chains, which are susceptible to scission reactions.…”

Section: Introductionmentioning

confidence: 99%

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Dynamic rheology and relaxation time spectra of oil-based self-degradable gels

Vernáez

Dagréou

Grassl

et al. 2015

J. Polym. Sci. Part B: Polym. Phys.

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In oil well treatments, such as matrix stimulations or water shut‐off, it is often necessary to temporary isolate or protect productive zones with chemical diverting agents. In this work, a solution of peroxide crosslinked styrene‐butadiene rubber (SBR) has been transformed to a self‐degradable gel system by adding hydroperoxide as a degradation agent to the formulation. This oil‐based self‐degradable gel has been characterized by linear oscillatory rheometry. In situ and ex situ experiments were performed to evaluate the evolution of crosslinking and degradation reactions, including the liquid‐solid transition. Relaxation time spectra were calculated from dynamic mechanical frequency sweeps. Structural changes in the polymer network were visible within the relaxation time spectra, since it qualitatively showed the contribution of local simple entanglements and chemical covalent bonds to the final rheological behavior. The influence of peroxide concentration, polymer concentration, hydroperoxide concentration, and temperature have been studied and described in terms of rheological changes. Finally, a hydrogen donor aromatic solvent was used as scavenger to retard both crosslinking and degradation reactions. © 2015 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2016, 54, 433–444

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

“…The effect of this solvent quality on the degradation of SBR has been studied in a previous work . In that work, it was demonstrated that Copesol® retards degradation reactions.…”

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Dynamic rheology and relaxation time spectra of oil-based self-degradable gels

Vernáez

Dagréou

Grassl

et al. 2015

J. Polym. Sci. Part B: Polym. Phys.

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Nano‐metal oxide fillers in thermo‐responsive polycaprolactone‐based polymer nanocomposites smart materials: Impact on thermo‐mechanical, and shape memory properties

Gopinath

Adarsh

Nair

et al. 2021

Vinyl Additive Technology

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The present study introduces the properties of three thermo-responsive shape memory polymer nanocomposites (SMPCs), viz. SMPC-NiO (SMP with nickel oxide), SMPC-Fe 2 O 3 (SMP with iron oxide), and SMPC-Fe 2 NiO 4 (SMP with iron nickel oxide) along with the neat SMP blend. Styrene-Butadiene rubber and poly ε-caprolactone (PCL) polymer are the vital part, which forms the backbone of polymer-elastomer blend matrix. This study helps to understand the effect and influence of these metal oxide nanofillers' integrated blend on their different inbuilt properties. The tensile test and dynamic mechanical analysis studies confirmed that SMPC-Fe 2 NiO 4 holds a large elastic modulus value and very rigid compared to other SMPCs. Thermal decomposition studies using differential scanning calorimetry, thermogravimetric (TG) analysis, and TG-gas chromatography and mass spectrometry results show that the nanocomposites undergoes a two-stage decomposition process. The shape memory test reveals that the time taken for temporary shape recovery is high for SMPC-Fe 2 NiO 4 because of its rigid nature and low for SMPC-Fe 2 O 3 . The results revealed that, from this exploratory study, the integration of metal oxide nanopowder fillers, especially Fe 2 O 3 with neat SMP, showed better properties.

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Application of multi-capillary column – ion mobility spectrometry (MCC-IMS) in rubber chemistry and technology

Pietrzak

Bieliński

2018

Int. J. Ion Mobil. Spec.

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In this paper the possibility for authentication and differentiation of various styrene butadiene rubbers (SBRs) was investigated. Seven types of SBR were analyzed by multi-capillary column (MCC) ion mobility spectrometer (IMS) and their spectra compared. The analysis of volatile organic compounds (VOCs) releasing from the rubbers revealed the presence of characteristics signals, which can be assigned only to a specific material. Such Bmarkers^, when defined for other polymer materials, can be used for their authentication. In the second part of the paper, the blend of epoxidized natural rubber and poly-3-hydroxybutyrate-co-4-hydroxybutyrate (ENR/P(3,4)HB) was subjected to different types of aging. MCC-IMS spectra of not aged, thermal, climatic and UVaged samples were collected and differences between the signals discussed. The study showed possibility of authentication of polymeric materials and processes. The paper is a some kind of introduction to the use of analytical properties and advantages of MCC-IMS technique in chemistry, technology and exploitation of polymer materials.

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Degradation of styrene butadiene rubber (SBR) in anaerobic conditions

Cited by 11 publications

References 22 publications

Dynamic rheology and relaxation time spectra of oil-based self-degradable gels

Dynamic rheology and relaxation time spectra of oil-based self-degradable gels

Nano‐metal oxide fillers in thermo‐responsive polycaprolactone‐based polymer nanocomposites smart materials: Impact on thermo‐mechanical, and shape memory properties

Application of multi-capillary column – ion mobility spectrometry (MCC-IMS) in rubber chemistry and technology

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