Vulcanization of rubber. Kinetic parameters for SBR and simulations of vulcanization in a mold

Jönsson, Kersti; Flodin, Per

doi:10.1002/app.1991.070431001

Cited by 4 publications

(3 citation statements)

References 23 publications

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“…It seems as the CB content increases, the scorch time decreases and the rate of cure increases. It can be explained by the fact that the active groups on the CB surfaces are effective on the curing reaction and accelerate the vulcanization, on the other hand, thermal conductivity of compound increases in the presence of CB [4, 14]. Therefore, with existence of more CB amount in the compound cure process occurs in less time and higher rate, scorch time decreases and rate of cure increases.…”

Section: Resultsmentioning

confidence: 99%

“…Generally, in these equipments, a certain shear strain is applied and the torque response of the material is measured. Conventional rheometers include two‐parallel‐plate and cone‐and‐plate types which are utilized to study the rheological and the cure properties of the rubber compounds [13–21]. But in these instruments wall slip may occur and the sample loading in the gap is not easy, affecting the repeatability of the tests.…”

Section: Introductionmentioning

confidence: 99%

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Study of the cure characteristics and viscoelastic behavior of styrene‐butadiene rubber compounds by using a rubber process analyzer

Karrabi

Mohammadian-Gezaz

2010

Vinyl Additive Technology

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Viscoelastic and cure properties of styrene-butadiene rubber compounds were investigated by using a ''Rubber Process Analyzer.'' The effects of sulfur content in the cure system and carbon black (CB) type and concentration on the cure behavior of samples were studied. As the ratio of S/accelerator in the curative increased, the cure rate increased, and the cure time decreased. Here, the elasticity was analyzed by considering the drop in the maximum of viscous torque (D S 00 ) and the resilience, which increased for the cure systems in the order of conventional < semiefficient < efficient. Compounds with the higher loading and fine particle size of CB had the greater cure torque values, higher vulcanization rates, and the lower cure times. With increasing CB content and CB specific surface area, D S 00 diminished, hence the elasticity. The Payne effect was observed in all strain-sweep curves. At higher level and surface area of CB, the linear viscoelastic region disappeared, and the strain dependency of G 0 was more pronounced. For higher loading and smaller particle size of CB, the relaxation modulus declined rather abruptly, and relaxation time increased. These observations signified more viscous and less elastic responses in these samples. Viscoelastic properties of compounds were explained by considering the hydrodynamic and dilution effects.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Study of the cure characteristics and viscoelastic behavior of styrene‐butadiene rubber compounds by using a rubber process analyzer

Karrabi

Mohammadian-Gezaz

2010

Vinyl Additive Technology

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“…56 Many dynamical models describing the autocatalysis process have been used in related reports. 57,58 The common Kamal-Sourour model used to describe the vulcanization kinetics is dened as follows: 59 da dt ¼ kðTÞa m ð1 À aÞ n…”

Section: Vulcanization Behaviors Of Rubber Composite Materialsmentioning

confidence: 99%

A functional modified graphene oxide/nanodiamond/nano zinc oxide composite for excellent vulcanization properties of natural rubber

2020

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Modeling the vulcanization of rubbers in an oscillating bicone cell

Deiber

Bortolozzi

Peirotti

1995

J of Applied Polymer Sci

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SYNOPSISThis work studies the evolution of dynamic rheometric functions (dynamic viscosity ~' ( w ) and storage modulus G'(o)) with the degree of vulcanization and temperature of wellcharacterized SBR and NBR compounds. Experiments are carried out in an oscillating bicone cell, and results are well fitted through a model that considers flow kinematics, heat transfer, curing kinetics, and rheological functions. It is possible to quantify the model parameters and to understand better the evolution of filled rubber compounds toward crosslinked networks or vulcanizates. Conclusions are also obtained on the interplay between rheological functions and molecular parameters (average molecular weight and polydispersity). Experimental evaluations of the ratios between oscillating torques, at different times of the curing process, correlate directly with changes in rheological properties of the samples studied. 0 1995 John Wiley & Sons, Inc.

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Vulcanization of rubber. Kinetic parameters for SBR and simulations of vulcanization in a mold

Cited by 4 publications

References 23 publications

Study of the cure characteristics and viscoelastic behavior of styrene‐butadiene rubber compounds by using a rubber process analyzer

Study of the cure characteristics and viscoelastic behavior of styrene‐butadiene rubber compounds by using a rubber process analyzer

A functional modified graphene oxide/nanodiamond/nano zinc oxide composite for excellent vulcanization properties of natural rubber

Modeling the vulcanization of rubbers in an oscillating bicone cell

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