The effects of rigid polystyrene particles on the glass transition characteristics and mechanical wave attenuation of styrene-butadiene rubber: Particle size and acoustic mismatch

2009 ◽  
Vol 48 (1) ◽  
pp. 82-88 ◽  
Author(s):  
Farhad Faghihi ◽  
Naser Mohammadi ◽  
Majid Haghgoo
Keyword(s):  
Particle Size ◽  
Glass Transition ◽  
Wave Attenuation ◽  
Rubber Particle ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Mechanical Wave ◽  
Acoustic Mismatch ◽  
Styrene Butadiene

Particle Size, Structure and Powdering Process of Calcium Carbonate Nanoparticles Filled Powdered Styrene-Butadiene Rubber

2011 ◽  
Vol 415-417 ◽  
pp. 237-242
Author(s):  
Zhou Da Zhang ◽  
Xue Mei Chen ◽  
Guo Liang Qu
Keyword(s):  
Particle Size ◽  
Calcium Carbonate ◽  
Size Structure ◽  
Average Diameter ◽  
Rubber Matrix ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Particle Structure ◽  
Styrene Butadiene ◽  
New Particles

Calcium carbonate nanoparticles (nano-CaCO3) filled powdered styrene-butadiene rubber (P(SBR/CaCO3) was prepared by adding nano-CaCO3 particles, encapsulant and coagulant to styrene-butadiene rubber (SBR) latex by coacervation, and the particle size distribution, structure were studied. Scanning electron microscopy (SEM) was used to investigate the (P(SBR/CaCO3) particle structure, and a powdering model was proposed to describe the powdering process. The process includes: (i) the latex particles associated with the dispersed nano-CaCO3 particles (adsorption process) to form “new particles” and (ii) the formation of P(SBR/CaCO3) by coagulating “new particles”. The SEM results also shown that the nano-CaCO3 and rubber matrix have formed a macroscopic homogenization in the (P(SBR/CaCO3) particles and nano-CaCO3 dispersed uniformly in the rubber matrix with an average diameter of approximately 50 nm.

The glass transition and interfacial layer in styrene-butadiene rubber containing silica nanofiller

Polymer ◽  
2003 ◽  
Vol 44 (20) ◽  
pp. 6259-6266 ◽  
Author(s):  
V Arrighi ◽  
I.J McEwen ◽  
H Qian ◽  
M.B Serrano Prieto
Keyword(s):  
Glass Transition ◽  
Interfacial Layer ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Styrene Butadiene

Particle Size Distribution of SBR and NBR Latexes by UV-VIS Turbidimetry near the Rayleigh Region

1996 ◽  
Vol 69 (4) ◽  
pp. 696-712 ◽  
Author(s):  
Mario A. Llosent ◽  
Luis M. Gugliotta ◽  
Gregorio R. Meira
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Average Diameter ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Data Treatment ◽  
Distribution Shape ◽  
Soft Polymer ◽  
Styrene Butadiene

Abstract This paper deals with data treatment problems that arise when turbidimetry is employed to estimate the particle size distribution (PSD) of soft polymer latexes with low diameter limits around 40 nm. Scanning electron microscopy and dynamic light scattering were used as comparison techniques. Industrial latexes of styrene-butadiene rubber (SBR) and of acrylonitrile-butadiene rubber (NBR) were investigated. The data treatment involved the use of Mie's Model to obtain an average diameter and/or the complete PSD. For estimating the complete PSD, a least squares optimization (with an imposed distribution shape) and a numerical deconvolution procedure (without assumptions on the distribution shape) were attempted. A synthetic example was solved to investigate the limits of the applied numerical methods. For the polymer refractive index functions, Cauchy's Law was used — and its adequate adjustment proved essential for good turbidimetric estimations. A reasonable agreement between the turbidity measurements and the other independent estimations was verified. For the SEM observations, the soft latexes were hardened by irradiation before observation, but negligible diameter variations were detected.

Prediction of the glass transition temperature and design of phase diagrams of butadiene rubber and styrene–butadiene rubber via molecular dynamics simulations

2017 ◽  
Vol 19 (25) ◽  
pp. 16498-16506 ◽  
Author(s):  
Myung Shin Ryu ◽  
Hyoung Gyu Kim ◽  
Hyun You Kim ◽  
Kyung-Shin Min ◽  
Hak Joo Kim ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Molecular Dynamics Simulations ◽  
Phase Diagrams ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Dynamics Simulations ◽  
Styrene Butadiene

In this study, we developed an equation to evaluate the pseudo-ternary Tg of quaternary SBR and plotted the ternary contour Tg plot for SBR with a variety of styrene compositions.

A Novel Method to Recycle Scrap Tires: High-Pressure High-Temperature Sintering

2002 ◽  
Vol 75 (5) ◽  
pp. 955-968 ◽  
Author(s):  
Jeremy E. Morin ◽  
Drew E. Williams ◽  
Richard J. Farris
Keyword(s):  
Mechanical Properties ◽  
High Pressure ◽  
High Temperature ◽  
Rubber Particle ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Scrap Tires ◽  
Vulcanized Rubber ◽  
High Pressure High Temperature ◽  
Styrene Butadiene

Abstract High-pressure high-temperature sintering (HPHTS) is a novel recycling technique that makes it possible to recycle vulcanized rubber powders made from waste rubber (namely scrap tires) through only the application of heat and pressure. A brief look into the mechanism of sintering will be presented along with information about the influence of molding variables, such as time, temperature, pressure and rubber particle size on the mechanical properties of the produced parts. One of the most interesting observations is that powders of every crosslinked elastomer attempted sintered together via this technique, including silicone rubber (SI), sulfur cured [natural rubber (NR), ethylene-propylene-diene rubber (EPDM), styrene-butadiene rubber (SBR)], peroxide cured butadiene rubber (BR), and fluoroelastomers (FKM). Early work on sintered rubber made from commercially available rubber powder had a modulus of 1 to 2 MPa, strength of 4 to 7 MPa and an elongation at break of 150–250%. Recently, in-house ground samples of SBR have had sintered values over 9.5 MPa strength and 275% elongation, or greater than 60% retention of the original properties. Many of these mechanical properties are comparable with industrially manufactured rubbers, and it is believed that recycled rubbers produced via HPHTS offer the potential to replace virgin rubber in numerous applications.

Composition-dependent depression of the glass transition temperature of the rubber phase in a PE-SBR blend

e-Polymers ◽  
2015 ◽  
Vol 15 (6) ◽  
pp. 393-399
Author(s):  
Ali Akbar Yousefi
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Domain Size ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Two Phase ◽  
Thin Polymer ◽  
Elastomeric Blend ◽  
Styrene Butadiene

AbstractA thermoplastic elastomeric blend was introduced based on high-density polyethylene and styrene-butadiene rubber (SBR). The morphology of the blend system was found to change from two-phase to co-continuous, depending on the polyethylene (PE) concentration. The thermo-mechanical measurements showed that, at the PE concentrations, which seemed to have a co-continuous morphology, the SBR inclusions were very fine. The fineness of the SBR domains resulted in a 20° depression of the glass transition temperature (Tg) of the SBR phase. This was attributed to the smooth interfaces at which the SBR chain sensed a higher free volume as compared with that in bulk SBR. A model correlating thin polymer thickness to the Tg of the confined polymer in the films was employed to correlate SBR domain size to the experimental Tg measured. The adjusting parameters A=129 and δ=1.45 were successfully used to fit the experimental data.

Co-milled silica and coppiced wood biochars improve elongation and toughness in styrene-butadiene elastomeric composites while replacing carbon black

2018 ◽  
Vol 50 (8) ◽  
pp. 667-676 ◽  
Author(s):  
Steven C Peterson ◽  
Nirmal Joshee
Keyword(s):  
Particle Size ◽  
Carbon Black ◽  
Populus Tremuloides ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Tire Industry ◽  
The Us ◽  
Styrene Butadiene ◽  
Elastomeric Composites ◽  
Lower Carbon

Carbon black (CB) is a petroleum by-product with a million ton market in the US tire industry. Finding renewable substitutes for CB reduces dependence on oil and alleviates global warming. Biochar is a renewable source of carbon that has been studied previously as a replacement for CB in styrene-butadiene rubber (SBR) composites. However, biochar typically has lower carbon content, higher ash content, and larger particle size, which are all significant detractors to making biochar a viable drop-replacement for CB. In this study, high carbon and low ash biochars made from fast-growing Paulownia elongata and Populus tremuloides were co-milled with small amounts of silica in order to reduce the particle size, and the biochar/silica blends were then used to partially replace CB in SBR composites. Using this method both Paulownia and poplar biochars were able to replace 30% of the CB filler and improve elongation and toughness with virtually no loss of tensile strength, compared to the 100% CB-filled control composite.

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