Effects of the type of crosslink on viscoelastic properties of natural rubber

Hagen, R.W.; Salmén, Lennart; Stenberg, Bengt

doi:10.1002/(sici)1099-0488(19960915)34:12<1997::aid-polb5>3.0.co;2-n

Cited by 114 publications

(77 citation statements)

References 1 publication

(1 reference statement)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…On the other hand, it decreased F solpol and, hence, increased the quantity of elastically effective chains. Both effects led to an increase in the storage modulus, as observed in other elastomers and elastomer composites …”

Section: Resultssupporting

confidence: 67%

Influence of crosslinking and plasticizing on the viscoelasticity of highly filled elastomers

Azoug

Nevière²,

Pradeilles-Duval

et al. 2014

J of Applied Polymer Sci

View full text Add to dashboard Cite

International audienceSolid propellants, like all highly filled elastomers, exhibit a complex nonlinear viscoelastic behavior. The aim of this study was to establish the relationships between the structure and properties, which is needed to construct a robust constitutive law for these materials. An extensive design of experiments approach allowed us to quantify the influence of the curing agents and plasticizer molecules on the microstructure of the propellant and its viscoelastic properties. Swelling and gel permeation chromatography measurements described the microstructure of the propellant and prestrained dynamic mechanical analysis (PDMA) characterized the viscoelastic behavior. The curing agents reacted with polymer chain ends participating in the network, in the sol fraction, or in filler–binder links. Consequently, the polymer network was incomplete even in stoichiometric conditions, and a minimum of 10% of the polymer was free in the microstructure. In addition, preswelling the polymer with plasticizer molecules before curing modified the obtained network by decreasing the crosslink density in the binder and increasing it in the vicinity of the filler surface. This study provided new insight into the local deformation mechanisms controlling nonlinearity as measured by PDMA. The nonlinear behavior appeared between 0 and 1.7% prestrain in both the elastic and viscous parts of the behavior. The network reached its maximum extensibility in the elastic part and constrained the sol fraction in this extended mesh for the viscous part. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 40392

show abstract

Section: Resultssupporting

confidence: 67%

Influence of crosslinking and plasticizing on the viscoelasticity of highly filled elastomers

Azoug

Nevière²,

Pradeilles-Duval

et al. 2014

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…The volume fraction (V r ) and cross-link density of the rubber composites are estimated from swelling measurements. 25,26 Surface morphology Studies on the morphology of tensile fractured surfaces of the composite are carried out using variable pressure field-emission scanning electron microscopy (FESEM; model SU 6000, Hitachi, Tokyo, Japan). The fractured end of the specimen is sputter coated with a thin layer of gold to avoid electrostatic charging during the SEM analysis.…”

Section: Characterizationmentioning

confidence: 99%

Processing characteristics and mechanical and electrical properties of chlorinated styrene–butadiene rubber/fly ash composites

Ramesan

2013

Journal of Thermoplastic Composite Materials

View full text Add to dashboard Cite

This work focused on the utilization of waste fly ash (FA) as filler in the reinforcement of chlorinated styrene-butadiene rubber (CSBR) with reference to their processing characteristics, morphological, thermal, and mechanical properties, solvent resistance, and electrical resistivity measurements. Rheometric properties such as optimum cure time and scorch time decreases with increase in filler content, whereas maximum torque increases up to 30 phr for FA particles. An appreciable increase in glass transition temperature has been observed from differential scanning calorimetric study. The mechanical properties such as tensile and tear strength, modulus, hardness, compression set, and heat buildup increases, whereas elongation at break and resilience decreases with loading of filler. The observed variation in mechanical properties has been supported by the fractography of the composites obtained by scanning electron microscopy. Variation in the bound rubber formation in CSBR/FA composite has been studied. The bound rubber content decreases with increasing extraction temperature, and its activation energy is also calculated from the Arrhenius plot. The electrical properties such as alternating current conductivity, dielectric constant, and dissipation factor are higher than that of CSBR, and the values increase with increase in the content of FA in the composites.

show abstract

“…The pure blends were mixed with 95% sulfur, 5% cyclohexyl benzothiazole sulfenamide, 5% zinc oxide, and 5% stearic acid. 28 The samples were then heated at 120°C for 8 h. They were then heated at 120°C for 8 h. The NR is ebonized by this method, so it appeared as a black stained portion. The lighter shaded portion was the SBR part.…”

Section: Scanning Electron Microscopy (Sem) Studiesmentioning

confidence: 99%

Morphology and mechanical and viscoelastic properties of natural rubber and styrene butadiene rubber latex blends

Varkey

Augustine

Groeninckx

et al. 2000

J. Polym. Sci. B Polym. Phys.

View full text Add to dashboard Cite

Effects of the type of crosslink on viscoelastic properties of natural rubber

Cited by 114 publications

References 1 publication

Influence of crosslinking and plasticizing on the viscoelasticity of highly filled elastomers

Influence of crosslinking and plasticizing on the viscoelasticity of highly filled elastomers

Processing characteristics and mechanical and electrical properties of chlorinated styrene–butadiene rubber/fly ash composites

Morphology and mechanical and viscoelastic properties of natural rubber and styrene butadiene rubber latex blends

Contact Info

Product

Resources

About