A critical analysis of the effect of crosslinking on the linear viscoelastic behavior of styrene-butadiene rubber and other elastomers

2013 ◽  
Vol 51 (8) ◽  
pp. 687-697 ◽  
Author(s):  
Rasika Prabhu ◽  
Rasmus Klitkou ◽  
Grigori A. Medvedev ◽  
James M. Caruthers
Keyword(s):  
Critical Analysis ◽  
Viscoelastic Behavior ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Linear Viscoelastic Behavior ◽  
Linear Viscoelastic ◽  
Styrene Butadiene

Mechanical and viscoelastic behavior of natural rubber and carboxylated styrene-butadiene rubber latex blends

2003 ◽  
Vol 88 (11) ◽  
pp. 2639-2648 ◽  
Author(s):  
Ranimol Stephen ◽  
K. V. S. N. Raju ◽  
Sobha V. Nair ◽  
Siby Varghese ◽  
Zachariah Oommen ◽  
...  
Keyword(s):  
Natural Rubber ◽  
Viscoelastic Behavior ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Rubber Latex ◽  
Carboxylated Styrene Butadiene Rubber ◽  
Styrene Butadiene

New Emulsion SBR Technology: Part I. Raw Polymer Study

2000 ◽  
Vol 73 (4) ◽  
pp. 731-742 ◽  
Author(s):  
Laurand Lewandowski ◽  
Morgan S. Sibbald ◽  
Ed Johnson ◽  
Michael P. Mallamaci
Keyword(s):  
Molecular Weight ◽  
World War Ii ◽  
High Molecular Weight ◽  
Viscoelastic Behavior ◽  
Flow Region ◽  
Size Exclusion ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Two Phase ◽  
Styrene Butadiene

Abstract Emulsion styrene—butadiene rubber (ESBR) has been the workhorse of the tire industry since World War II. With the development of solution polymers, ESBR has seen a steady decrease in its use in tire applications. A novel ESBR has been developed which imparts some of the rheological behavior previously only observed in solution polymers. This new ESBR was prepared by blending a high molecular weight elastomer with a low molecular weight elastomer, each having a unique styrene-butadiene composition. A two-phase co-continuous morphology was observed by scanning probe microscopy when the bound styrene difference between the two components was greater than 18%, consistent with the two glass transition temperatures measured by thermal analysis. Blending also served to reduce the amount of very high molecular weight material (> 107 g/mol) readily observed in 1502- and 1712-type polymers by thermal field flow fractionation (ThFFF). ThFFF was found to be superior to size exclusion chromatography for fully characterizing the molecular weight and molecular weight distribution of the polymers. Time—temperature superposition was performed to characterize the viscoelastic behavior in the rubbery plateau and terminal zones. The ESBR blends showed a cross-over in the terminal flow region that was not observed in 1502- and 1712-type polymers.

Effect of Carboxylated Styrene-Butadiene Rubber Latex Amount on the Viscoelastic Behavior of Paper Coating Modified with Nanosized Particles

2011 ◽  
Vol 236-238 ◽  
pp. 1322-1325 ◽  
Author(s):  
Yan Jun Tang ◽  
You Ming Li ◽  
Guo Xin Xue ◽  
Yu Zhao ◽  
Xiu Mei Zhang ◽  
...  
Keyword(s):  
Storage Modulus ◽  
Loss Modulus ◽  
Viscoelastic Behavior ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Nanosized Particles ◽  
Rubber Latex ◽  
Paper Coating ◽  
Carboxylated Styrene Butadiene Rubber ◽  
Styrene Butadiene

The focus of this study is to investigate the effect of carboxylated styrene-butadiene rubber (SBR) latex on the dynamic rheologcial properties of paper coating suspensions modified with nanosized particles. The elastic storage modulus G′ and the viscid loss modulus G′′ are used to evaluate the dynamic rheologcial properties of paper coating suspensions. The effects of different amount carboxylated styrene-butadiene rubber latex on the flow parameters of paper coating suspensions are comparatively presented. It is shown that the dynamic elastic storage modulus G′ and viscid loss modules G′′ of paper coating suspensions increase with the SBR content change from 13% to 18%. The dynamic rheologcial properties are related to the strength of the network structure of paper coating suspensions. It is also found that the elastic storage modulus G′ of paper coating suspensions is larger than viscid loss modulus G′′, which indicates that paper coating suspensions in this investigation all behave like a viscoelastic solid.

scholarly journals An Investigation on the Thermally Induced Compatibilization of SBR and α-Methylstyrene/Styrene Resin

Polymers ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 1267
Author(s):  
Arnaud Wolf ◽  
João Paulo Cosas Fernandes ◽  
Chuanyu Yan ◽  
Reiner Dieden ◽  
Laurent Poorters ◽  
...  
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Solid State ◽  
Viscoelastic Properties ◽  
Viscoelastic Behavior ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Thermally Induced ◽  
And Performance ◽  
Crosslinking Reactions ◽  
Styrene Butadiene

The miscibility between two polymers such as rubbers and performance resins is crucial to achieve given targeted properties in terms of tire performances. To this aim, α-methylstyrene/styrene resin (poly(αMSt-co-St)) are used to modify the viscoelastic behavior of rubbers and to fulfill the requirements of the final applications. The initial aim of this work was to understand the influence of poly(αMSt-co-St) resins blended at different concentrations in a commercial styrene-butadiene rubber (SBR). Interestingly, while studying the viscoelastic properties of SBR blends with poly(αMSt-co-St), crosslinking of the rubber was observed under conditions where it was not expected to happen. Surprisingly, after the crosslinking reactions, the poly(αMSt-co-St) resin was irreversibly miscible with SBR at concentrations far above its immiscibility threshold. A detailed investigation involving characterization technics including solid state nuclear magnetic resonance led to the conclusion that poly(αMSt-co-St) is depolymerizing under heating and can graft onto the chains of SBR. It results in an irreversible compatibilization mechanism between the rubber and the resin.

Modeling of the Linear Viscoelastic Behavior of Partially Hydrogenated Polymer-Modified Asphalts

2007 ◽  
Vol 80 (2) ◽  
pp. 340-364 ◽  
Author(s):  
M. A. Vargas ◽  
R. Herrera ◽  
O. Manero
Keyword(s):  
Relaxation Times ◽  
Viscoelastic Behavior ◽  
Maxwell Model ◽  
Low Frequencies ◽  
Emulsion Model ◽  
Wide Range ◽  
Linear Viscoelastic Behavior ◽  
Linear Viscoelastic ◽  
Polymer Modified Asphalt ◽  
Styrene Butadiene

Abstract The modeling of the linear viscoelastic behavior of asphalt modified with 8 wt % of partially hydrogenated poly (styrene-butadiene-styrene) triblock copolymers is analyzed. Time-temperature superposition renders master curves in a wide range of frequencies and temperatures, from which a logarithmic distribution of relaxation times is obtained using the multimode Maxwell model. In addition, the linear viscoelastic data is analyzed with an emulsion model and agreement is only found at high frequencies, where the contribution from interfacial tension is negligible. Enhanced polymer-asphalt interactions at low frequencies evidenced by a decreasing limiting slope of the storage modulus in the terminal region are not predicted by the emulsion model, and relative agreement is found considering two viscoelastic phases. The Cole-Cole representation and the fractional Maxwell model predict the viscosity of asphalt in the complex plane, but strong asymmetry in the semicircular arcs is found in the polymer-modified asphalt blends. The Havriliak-Negami model accounts for asymmetric arcs and represents the data better in specific ranges of frequency.

Effects of White Rot Fungus Physisporinus sp., Isolated in Japan, on Styrene-butadiene Rubber

2020 ◽  
Vol 93 (9) ◽  
pp. 289-292
Author(s):  
Yumi SHIMIZU ◽  
Shuma SATHO ◽  
Taro NAKAJIMA ◽  
Hiroaki KOUZAI ◽  
Kiminori SHIMIZU
Keyword(s):  
White Rot ◽  
White Rot Fungus ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Styrene Butadiene
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