New insight into structure-property relationships of natural rubber and styrene-butadiene rubber nanocomposites filled with MWCNT

Polymer ◽  
2020 ◽  
Vol 201 ◽  
pp. 122604 ◽  
Author(s):  
Pilar Bernal-Ortega ◽  
M. Mar Bernal ◽  
Antonio González-Jiménez ◽  
P. Posadas ◽  
Rodrigo Navarro ◽  
...  
Keyword(s):  
Natural Rubber ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Structure Property ◽  
Structure Property Relationships ◽  
Rubber Nanocomposites ◽  
Styrene Butadiene ◽  
Insight Into

The Mechanical Properties of Modified Attapulgite Reinforced Nature Rubber and Styrene-Butadiene Rubber Nanocomposites

2010 ◽  
Vol 150-151 ◽  
pp. 762-765
Author(s):  
Ji Hu Wang ◽  
Hong Bo Liu ◽  
Shao Guo Wen ◽  
Yan Shen
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Natural Rubber ◽  
Coupling Agent ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
The Matrix ◽  
Modified Attapulgite ◽  
Rubber Nanocomposites ◽  
Styrene Butadiene

Attapulgite (AT)/natural rubber (NR)/ styrene-butadiene rubber (SBR) nanocomposites have been prepared after attapulgite was modified by different coupling agent. The treatment of AT caused the adhesion between AT nanorods and the nature rubber/styrene-butadiene rubber was improved, which enhanced the tensile properties of the matrix. The tensile strength of composites attained 15.6 MPa after AT was modified by 3%wt Si-69 coupling with addition of 20 phr.

Insights into Sulfur Vulcanization from QSPR Quantitative Structure-Property Relationships Studies

1999 ◽  
Vol 72 (2) ◽  
pp. 318-333 ◽  
Author(s):  
Fred Ignatz-Hoover ◽  
Alan R. Katritzky ◽  
Victor S. Lobanov ◽  
Mati Karelson
Keyword(s):  
Molecular Descriptors ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Structure Property ◽  
Concerted Mechanism ◽  
Structure Property Relationships ◽  
Quantitative Structure Property Relationships ◽  
Crosslinking Reactions ◽  
Styrene Butadiene ◽  
Aromatic Heterocyclic

Abstract Vulcanization of styrene-butadiene rubber, as accelerated by a series of sulfenamides and sulfenimides prepared from various aromatic heterocyclic thiols and various aliphatic amines, was studied using the curemeter under isothermal conditions. Further studies using MOPAC AM1 semiempirical quantum mechanical calculations and CODESSA QSAR software yielded excellent correlations of molecular descriptors of accelerators or accelerator thiolate zinc complexes to the onset of cure and maximum rate of vulcanization. The QSAR results support previously proposed mechanisms describing the origin of scorch delay for the delayed action, fast curing sulfenamide accelerators. In addition, the results support a carbanionic concerted mechanism for the sulfurization and crosslinking reactions.

scholarly journals Crosslinked Elastomers: Structure–Property Relationships and Stress-Optical Law

Polymers ◽  
2021 ◽  
Vol 14 (1) ◽  
pp. 9
Author(s):  
Paul Sotta ◽  
Pierre-Antoine Albouy ◽  
Mohammad Abou Taha ◽  
Benoit Moreaux ◽  
Caroline Fayolle
Keyword(s):  
Styrene Butadiene Rubber ◽  
Multiple Quantum ◽  
Butadiene Rubber ◽  
Structure Property ◽  
Advanced Technique ◽  
Entropic Elasticity ◽  
Structure Property Relationships ◽  
X Ray Scattering ◽  
Styrene Butadiene ◽  
Segmental Orientation

We present a combination of independent techniques in order to characterize crosslinked elastomers. We combine well-established macroscopic methods, such as rheological and mechanical experiments and equilibrium swelling measurements, a more advanced technique such as proton multiple-quantum NMR, and a new method to measure stress-induced segmental orientation by in situ tensile X-ray scattering. All of these techniques give access to the response of the elastomer network in relation to the crosslinking of the systems. Based on entropic elasticity theory, all these quantities are related to segmental orientation effects through the so-called stress-optical law. By means of the combination of these techniques, we investigate a set of unfilled sulfur-vulcanized styrene butadiene rubber elastomers with different levels of crosslinking. We validate that the results of all methods correlate very well. The relevance of this approach is that it can be applied in any elastomer materials, including materials representative of various industrial application, without prerequisite as regards, e.g., optical transparency or simplified formulation. Moreover, the approach may be used to study reinforcement effects in filled elastomers with nanoparticles.

Tensile Behavior after Oxidative Aging of Gum and Black-Filled Vulcanizates of SBR and NR

1999 ◽  
Vol 72 (4) ◽  
pp. 721-730 ◽  
Author(s):  
G. R. Hamed ◽  
J. Zhao
Keyword(s):  
Tensile Strength ◽  
Natural Rubber ◽  
Tensile Behavior ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Oxidative Aging ◽  
Prolonged Aging ◽  
Aging Period ◽  
Early Aging ◽  
Styrene Butadiene

Abstract Typical sulfur-cured vulcanizates of styrene-butadiene rubber (SBR) and natural rubber (NR) were prepared, and subjected to air-oven aging at 100 °C. Gum specimens exhibited an initial aging period in which stiffness was unchanged, while tensile strength and strain-to-break were significantly reduced. In contrast, black-filled vulcanizates stiffened during early aging. After intermediate aging times, NR specimens softened, while SBR stiffened. With prolonged aging, all compositions became hard and inextensible.

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