Compounding EPDM for Dynamics Applications

Hazelton, D. R.; Puydak, R. C.

doi:10.5254/1.3547381

Cited by 13 publications

(4 citation statements)

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“…A graft-coupling reaction takes place between the ATBN and maleated PP, and the resulting poly(butadiene/acrylonitrile)-g-polypropylene copolymer compatibilizes the NBR/PP blend. (Hazelton and Puydak 1987;Kay and Ouhadi 1991;Anonymous 1988). The blend containing a high volume fraction of butyl rubber dispersion in PP exhibits good thermoplastic elastomers with (a) low moisture permeability (b) high vibration damping (c) good heat, UV, and solvent resistance.…”

Section: Thermoplastic Dynamically Vulcanized Elastomer Blends (Tpv Bmentioning

confidence: 99%

Commercial Polymer Blends

Akkapeddi¹

2014

Polymer Blends Handbook

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Section: Thermoplastic Dynamically Vulcanized Elastomer Blends (Tpv Bmentioning

confidence: 99%

Commercial Polymer Blends

Akkapeddi¹

2014

Polymer Blends Handbook

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“…For natural rubber, the loss factor is low as the addition of fillers could not induce a larger variation in K″ . However, for the NBR, values of K″ is significant compared to K′ that subsequently resulted in larger values of the loss factor (Hazelton and Puydak, 1971).…”

Section: Discussionmentioning

confidence: 99%

An experimental investigation on the matrix dependent rheological properties of MRE

Poojary,

Kiran,

Hegde

et al. 2023

Journal of Intelligent Material Systems and Structures

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The rheological properties of magnetorheological elastomers are influenced by magnetically sensitive fillers and the elastomer matrix. The ability to respond to an external magnetic field is imparted by the fillers, while the load-bearing capability is determined by the matrix type. In this paper, the effect of matrix material on the properties of magnetorhological elastomer is explored experimentally. Carbonyl iron particle content is varied by 0%, 15% and 25% by volume to produce magnetorheological elastomer samples using natural rubber, silicone rubber and nitrile butadiene rubber matrices. Forced transmissibility test approach was employed to evaluate the field induced variations in the dynamic stiffness and loss factor of magnetorheological elastomers. The dynamic stiffness of nitrile butadiene rubber is the highest, while that of silicone rubber is the lowest. Addition of carbonyl iron particles significantly improves stiffness, although these gains depend on the properties of unfilled matrix. The addition of 25% by volume of carbonyl iron particle increased the dynamic stiffness of a silicone rubber matrix based magnetorheological elastomer by 67.78%, while the similar change in magnetorheological elastomer with nitrile butadiene rubber matrix was 38.58%. The field dependent response of magnetorheological elastomers is governed by the matrix and ferromagnetic filler concentration. These qualities are higher in magnetorheological elastomer with a low initial dynamic stiffness matrix and lower in magnetorheological elastomers with a stiffer matrix.

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“…Rinde and Hoge8, 9 constructed the master curve of dynamic shear modulus of polystyrene bead foams and solid polymer for different frequencies as well as for a wide range of temperatures. The linear elastic properties of microcellular plastics have been reported by Jackson et al10 Strain‐dependent dynamic mechanical properties of solid rubbers are reported by several workers,11–20 whereas very little work on closed cell microcellular rubbers has been investigated. The studies on the viscoelastic behaviors of closed cell microcellular ethylene–octene copolymer21–23 show that the storage modulus and tan δ (the ratio of loss modulus and storage modulus) are frequency‐ and temperature‐dependent, and the log of storage modulus bears a linear relationship with the log of density.…”

Section: Introductionmentioning

confidence: 94%

Dynamic mechanical properties of conductive carbon black‐reinforced closed cell microcellular oil‐extended EPDM rubber vulcanizates: Effect of blowing agent, temperature, frequency, and strain

Mahapatra¹,

Tripathy²

2006

J of Applied Polymer Sci

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Dynamic viscoelastic properties of Vulcan XC 72 (excess conductive carbon black)-reinforced solid-and closed-cell microcellular controlled long chain branching grade oil-extended EPDM (Keltan 7341A) rubber vulcanizates were studied at four frequencies of 3. 5, 11, 35, and 110 Hz, and at a temperature range of Ϫ100 to 160°C.The effect of blowing agent (ADC 21) loading on storage modulus (EЈ) and loss tangent (tan ␦) was studied. The log of storage modulus bears a linear relationship with the log of density for both solid and microcellular rubber. Relative storage modulus (EЈ f /EЈ s ) decreases with decrease in relative density ( f / s ). Both EЈ and tan ␦ were found to be dependent on frequency and temperature. The master curves of the storage modulus versus log temperature-reduced frequency were formed by superimposing EЈ results and by using shift factors calculated by Arrhenius equation. Strain-dependent isothermal dynamic viscoelastic properties were carried out for dynamic strain amplitude of 0.08 -7%. Cole-Cole plots of microcellular vulcanizates show a circular arc with blowing agent (density). Empirical relationship between tan ␦ versus EЈ is found to be linear, whose slope is independent of blowing agent loading or density.

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Compounding EPDM for Dynamics Applications

Cited by 13 publications

References 0 publications

Commercial Polymer Blends

Commercial Polymer Blends

An experimental investigation on the matrix dependent rheological properties of MRE

Dynamic mechanical properties of conductive carbon black‐reinforced closed cell microcellular oil‐extended EPDM rubber vulcanizates: Effect of blowing agent, temperature, frequency, and strain

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