Experimental and Numerical Investigations for Quantifying Variability of NR Mechanical Properties after Thermal Aging

2020 ◽  
pp. 000-000
Author(s):  
Andrés Malo Estepa ◽  
Franck Massa ◽  
Adnane Boukamel ◽  
Thierry Tison ◽  
Philippe Champagne ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Black ◽  
Numerical Simulations ◽  
Thermal Aging ◽  
Kriging Model ◽  
Dynamic Simulations ◽  
Numerical Investigations ◽  
Different Temperatures ◽  
Hyperelastic Model

ABSTRACT The evolution of mechanical properties of NR with carbon black fillers was examined after a thermal aging step through both experimentation and non-deterministic numerical simulations. A quantification of mechanical properties and associated variability is first proposed for a set of specimens exposed at different temperatures and exposure times. Second, a family of stretch–stress laws is numerically built with a James' hyperelastic model. Next, the whole of the behavior evolution is modeled with a Kriging model to quantify the effects of properties on a macroscopic stiffness, useful in dynamic simulations, and the least-favorable scenario is so determined. Finally, Arrhenius method is performed to numerically draw the evolution bounds of macroscopic stiffness as a function of aging exposure, followed by a comparison with a naturally aged suspension component. To our knowledge, the methodology developed has not already been proposed in this area.

Mechanical properties and thermal aging behaviour of polyisoprene/polybutadiene/styrene-butadiene rubber ternary blend reinforced with carbon black

2016 ◽  
Vol 98 ◽  
pp. 126-133 ◽  
Author(s):  
Slaviša Jovanović ◽  
Suzana Samaržija-Jovanović ◽  
Gordana Marković ◽  
Vojislav Jovanović ◽  
Tijana Adamović ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Black ◽  
Thermal Aging ◽  
Styrene Butadiene Rubber ◽  
Ternary Blend ◽  
Butadiene Rubber ◽  
Styrene Butadiene

Photocuring of Gelatin Films with TMPTMA: Effect on Aging Properties

2010 ◽  
Vol 123-125 ◽  
pp. 343-346 ◽  
Author(s):  
Nazia Rahman ◽  
Mubarak A. Khan ◽  
Ruhul A. Khan ◽  
M.Z.I. Mollah ◽  
Tofail A. Chowdhury
Keyword(s):  
Mechanical Properties ◽  
Optimum Condition ◽  
Thermal Aging ◽  
Gelatin Films ◽  
Aging Properties ◽  
Different Temperatures

Gelatin films were prepared from granular gelatin by casting. Gelatin films were modified by photocuring with a trifunftional monomer Trimethylolpropane trimethacrylate (TMPTMA). Optimum condition for photocuring were established. Water aging of untreated and modified gelatin films was studied. Thermal aging of untreated and TMPTMA treated films were determined at different temperatures (50°C, 70°C and 100°C) for 60 min. pH aging of gelatin films were investigated in different pH solutions (3.2, 4.1, 4.8, 6.9, 9.2, 12.2) for 1min. Water aging, thermal aging and pH aging showed that the TMPTMA grafted gelatin films experienced less deterioration of mechanical properties than pure gelatin films.

Predicting Useful Life of Green Tires through Different Methodologies

2019 ◽  
Vol 47 (2) ◽  
pp. 160-171
Author(s):  
Jordao Gheller
Keyword(s):  
Mechanical Properties ◽  
Carbon Black ◽  
Crack Growth ◽  
Critical Approach ◽  
Rubber Compounds ◽  
Different Temperatures ◽  
Useful Life ◽  
Tread Rubber ◽  
Complex Question ◽  
Reinforcing Filler

ABSTRACT One consideration when evaluating materials is the length of time over which they can be used, also called useful life. This is a complex question, especially for new green tire tread rubber compounds using silica as the main reinforcing filler that results in lower fuel consumption. The current work presents a critical approach of three methodologies used for predicting the useful life of different tire tread compositions. The methodologies considered were Arrhenius; Williams, Landel, and Ferry (WLF); and crack growth propagation. Different temperatures, strains, and mechanical properties were analyzed to evaluate the differences between the useful life of the new green tire tread and the carbon black reinforced reference one. Results showed different useful life for each evaluated property. Moreover, each tire tread composition presented a different useful life for the same property, while the silica reinforced composition presented a lower useful life when compared with the reference one.

scholarly journals The influence of carbon black on curing kinetics and thermal aging of acrylonitrile-butadiene rubber

2009 ◽  
Vol 15 (4) ◽  
pp. 283-289 ◽  
Author(s):  
Vojislav Jovanovic ◽  
Jaroslava Budinski-Simendic ◽  
Suzana Samardzija-Jovanovic ◽  
Gordana Markovic ◽  
Milena Marinovic-Cincovic
Keyword(s):  
Mechanical Properties ◽  
Carbon Black ◽  
Thermal Aging ◽  
Network Formation ◽  
Curing Kinetics ◽  
Hydraulic Press ◽  
Butadiene Rubber ◽  
Aging Properties ◽  
Before And After ◽  
Elastomeric Materials

Elastomers based on a copolymer of butadiene and acrylonitrile (NBR) have excellent oil resistance but are very sensitive for degradation at very high temperatures. The aim of this applicative contribution was to determine the effect of high abrasion furnace carbon black with primary particle size 46 nm on aging properties of elastomeric materials based on NBR as network precursor. The curing kinetics was determined using the rheometer with an oscillating disk, in which the network formation process is registered by the torque variation during time. The vulcanizates were obtained in a hydraulic press at 150?C. The mechanical properties of elastomeric composites were determined before and after thermal aging in an air circulating oven. The reinforcing effect of the filler particles was assessed according to mechanical properties before and after aging.

Dynamics of Nanoparticle Chain Aggregates of Carbon Under Tension

2003 ◽  
Vol 778 ◽  
Author(s):  
Rajdip Bandyopadhyaya ◽  
Weizhi Rong ◽  
Yong J. Suh ◽  
Sheldon K. Friedlander
Keyword(s):  
Mechanical Properties ◽  
Carbon Black ◽  
Polymer Film ◽  
Elastic Behavior ◽  
Small Strains ◽  
Transmission Electron ◽  
Chain Aggregates ◽  
Nanoparticle Chains ◽  
Reinforcing Filler

AbstractCarbon black in the form of nanoparticle chains is used as a reinforcing filler in elastomers. However, the dynamics of the filler particles under tension and their role in the improvement of the mechanical properties of rubber are not well understood. We have studied experimentally the dynamics of isolated nanoparticle chain aggregates (NCAs) of carbon made by laser ablation, and also that of carbon black embedded in a polymer film. In situ studies of stretching and contraction of such chains in the transmission electron microscope (TEM) were conducted under different maximum values of strain. Stretching causes initially folded NCA to reorganize into a straight, taut configuration. Further stretching leads to either plastic deformation and breakage (at 37.4% strain) or to a partial elastic behavior of the chain at small strains (e.g. 2.3% strain). For all cases the chains were very flexible under tension. Similar reorientation and stretching was observed for carbon black chains embedded in a polymer film. Such flexible and elastic nature of NCAs point towards a possible mechanism of reinforcement of rubber by carbon black fillers.

scholarly journals Impact of Deuteration and Temperature on Furan Ring Dynamics

Molecules ◽  
2021 ◽  
Vol 26 (10) ◽  
pp. 2889
Author(s):  
Przemyslaw Dopieralski ◽  
Iryna V. Omelchenko ◽  
Zdzislaw Latajka
Keyword(s):  
Conformational Changes ◽  
Furan Ring ◽  
Computational Studies ◽  
Significant Progress ◽  
Dynamic Simulations ◽  
Cyclic Molecules ◽  
Ring Dynamics ◽  
Different Temperatures ◽  
Long Time ◽  
Shape And Size

Despite significant progress in conformational analysis of cyclic molecules, the number of computational studies is still limited while most of that available in the literature data have been obtained long time ago with outdated methods. In present research, we have studied temperature driven conformational changes of the furan ring at three different temperatures. Additionally, the effect of deuteration on the ring dynamics is discussed; in addition, the aromaticity indices following the Bird and HOMA schemes are computed along all trajectories. Our ab initio molecular dynamic simulations revealed that deuteration has changed the furan ring dynamics and the obvious consequences; in addition, the shape and size of molecule are expected to be different.

scholarly journals Enhancement of Chloroprene/Natural/Butadiene Rubber Nanocomposite Properties Using Organoclays and Their Combination with Carbon Black as Fillers

Polymers ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 1085
Author(s):  
Patricia Castaño-Rivera ◽  
Isabel Calle-Holguín ◽  
Johanna Castaño ◽  
Gustavo Cabrera-Barjas ◽  
Karen Galvez-Garrido ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Black ◽  
High Performance ◽  
Rubber Matrix ◽  
Butadiene Rubber ◽  
X Ray Diffraction ◽  
X Ray ◽  
Rubber Blends ◽  
Ft Ir ◽  
Chloroprene Rubber

Organoclay nanoparticles (Cloisite® C10A, Cloisite® C15) and their combination with carbon black (N330) were studied as fillers in chloroprene/natural/butadiene rubber blends to prepare nanocomposites. The effect of filler type and load on the physical mechanical properties of nanocomposites was determined and correlated with its structure, compatibility and cure properties using Fourier Transformed Infrared (FT-IR), X-ray Diffraction (XRD), Thermogravimetric Analysis (TGA) and rheometric analysis. Physical mechanical properties were improved by organoclays at 5–7 phr. Nanocomposites with organoclays exhibited a remarkable increase up to 46% in abrasion resistance. The improvement in properties was attributed to good organoclay dispersion in the rubber matrix and to the compatibility between them and the chloroprene rubber. Carbon black at a 40 phr load was not the optimal concentration to interact with organoclays. The present study confirmed that organoclays can be a reinforcing filler for high performance applications in rubber nanocomposites.

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