Effect of entanglements in the microstructure of cured NR/SBR blends prepared by solution and mixing in a two-roll mill

Mansilla, M. A.; Valentín, Juan López; López-Manchado, M.A.; Jiménez, Antonio González; Marzocca, A. J.

doi:10.1016/j.eurpolymj.2016.06.023

Cited by 34 publications

(31 citation statements)

References 44 publications

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“…The blending method, in solution or mechanical in a two-roll mill, for NR/SBR blends with different composition has an impact on D res difference between the experimental values and the theoretical ones, based on a mixture law. Mechanical blending gives the highest differences, meaning lower efficacy, giving rise to stronger phase separation that leads to preferential migration of curatives in the NR phase, while solution blending enhances the interface between the phases [109].…”

Section: Industrial Applicationsmentioning

confidence: 99%

Time Domain NMR in Polymer Science: From the Laboratory to the Industry

2019

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Highly controlled polymers and nanostructures are increasingly translated from the lab to the industry. Together with the industrialization of complex systems from renewable sources, a paradigm change in the processing of plastics and rubbers is underway, requiring a new generation of analytical tools. Here, we present the recent developments in time domain NMR (TD-NMR), starting with an introduction of the methods. Several examples illustrate the new take on traditional issues like the measurement of crosslink density in vulcanized rubber or the monitoring of crystallization kinetics, as well as the unique information that can be extracted from multiphase, nanophase and composite materials. Generally, TD-NMR is capable of determining structural parameters that are in agreement with other techniques and with the final macroscopic properties of industrial interest, as well as reveal details on the local homogeneity that are difficult to obtain otherwise. Considering its moderate technical and space requirements of performing, TD-NMR is a good candidate for assisting product and process development in several applications throughout the rubber, plastics, composites and adhesives industry.

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Section: Industrial Applicationsmentioning

confidence: 99%

Time Domain NMR in Polymer Science: From the Laboratory to the Industry

2019

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“…In recent years, we have studied the morphological and physical properties of NR/SBR blends mixed by the solution technique and melt mixing with a CV cure system with an A/S ratio of 0.75phr/2.25phr [6][7][8][9][10][11]. For this ratio, it is expected to have a high concentration of di-and poly-sulfidic crosslinks [3].…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Natural rubber/styrene-butadiene rubber blends prepared by solution mixing: Influence of vulcanization temperature using a Semi-EV sulfur curing system on the microstructural properties

et al. 2017

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“…Moreover, for practical use, they also used an integrated experimental, kinetic, and finite element Fe modeling approach to optimize the production of tires . Angel José Marzocca and coworkers studied the influence of vulcanization temperature on the cure kinetics in NR/SBR blends, and investigated how free volume and entanglements influence the microstructure of NR/SBR blends . However, to date, how to determine and distinguish the vulcanization behaviors, especially the rate and kinetics for each single rubber phase in rubber blends during the co‐vulcanization process to further adjust the rubber additive composition is still a challenge, for the vulcanization parameters obtained by the conventional methods, such as by rheometer, only reflect the overall vulcanization behavior of the whole rubber blends, while the vulcanization rate and kinetics for a single rubber phase cannot be determined.…”

Section: Introductionmentioning

confidence: 99%

Effects of modified silica on the co‐vulcanization kinetics and mechanical performances of natural rubber/styrene–butadiene rubber blends

Dong

Luo

Lin

et al. 2019

J of Applied Polymer Sci

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Rubber blends are widely used for combining the advantages of each rubber component. However, to date, how to determine and distinguish the vulcanization kinetics for each single rubber phase in rubber blends during the co‐vulcanization process is still a challenge. Herein, high‐resolution pyrolysis gas chromatography–mass spectrometry (HR PyGC‐MS) was employed for the first time to investigate the vulcanization kinetics of natural rubber (NR) and styrene–butadiene rubber (SBR) in NR/SBR blends filled with modified silica (SiO2). The reaction rates of crosslinking of each rubber phase in NR/SBR were calculated, which showed that the crosslinking rates of NR were much lower than those of SBR phase in the unfilled blends and blends filled with unmodified and silane modified silica. Interestingly, the vulcanization rates of NR and SBR phase were approximately same in the vulcanization accelerator modified silica filled blends, showing better co‐vulcanization. In addition, the vulcanization accelerator modified silica was uniformly dispersed and endowed rubber blends with higher mechanical strength compared to the untreated silica. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48838.

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Effect of entanglements in the microstructure of cured NR/SBR blends prepared by solution and mixing in a two-roll mill

Cited by 34 publications

References 44 publications

Time Domain NMR in Polymer Science: From the Laboratory to the Industry

Time Domain NMR in Polymer Science: From the Laboratory to the Industry

Natural rubber/styrene-butadiene rubber blends prepared by solution mixing: Influence of vulcanization temperature using a Semi-EV sulfur curing system on the microstructural properties

Effects of modified silica on the co‐vulcanization kinetics and mechanical performances of natural rubber/styrene–butadiene rubber blends

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