Rheological Behavior of Unvulcanized Rubber

White, James L.

doi:10.1016/b978-0-12-234360-5.50011-0

Cited by 2 publications

(3 citation statements)

References 282 publications

(321 reference statements)

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“…where, n, and K1 are constants which are reported in Table V. The change in the fraction of dissipative energy ( f u ) with frequency is shown in Figure 9. The fraction of dissipative energy shows a sharp increase with frequency in the low frequency region (3)(4)(5)(6)(7)(8)(9)(10)(11) Hz) a t all temperatures except 120°C for 50/50 and 70/30 EVAc/CR blends, where it slowly increases with frequency. In the higher frequency region, the dissipative energy shows a decreasing trend a t the lower temperatures (80 and 100°C), except for CR, which maintains its increasing trend; whereas a t higher temperature (120"C), all blends except the 50/50 blend show an increasing trend.…”

Section: Dynamic Flowmentioning

confidence: 94%

“…The values of i,, and 77, are calculated using eqs. (6) and (7). Shear viscosity (77,) a t 80, 100, and 120°C is plotted against blend composition on a semilog scale in Figure 1.…”

Section: Capillary Flowmentioning

confidence: 99%

“…The completeness of the mixing consequently influences the final product quality. The rheological parameters like shear stress ( 7 ) and rate of shear (+) follow the power law relationship, where K and n are constants known as the consistency index and non-Newtonian index, respectively.…”

Section: Introductionmentioning

confidence: 99%

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Effect of rheological parameters on the miscibility and polymer-filler interactions of the black-filled blends of polyethylene-vinyl acetate and polychloroprene

Kundu

Tripathy

Gupta

1996

J. Appl. Polym. Sci.

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SYNOPSIS Miscibility of 30 phr loaded black-filled (N110) blends of polyethylene-vinyl acetate (EVAc, VAc content 28%) and polychloroprene (CR) are investigated through shear and dynamic deformations. Both shear (qn) and dynamic elongational (ak) viscosities are conducive to their miscibility as both show positive deviation for all blends, though dynamic out-ofphase (&) viscosity shows negative-positive deviation. Both qo and follow the power law relationship with shear rate (+wu,) and frequency ( w ) , respectively. Both storage (E') and loss (E") modulii increases with frequency. The higher dissipative energy a t around 11 Hz may be due to its syncronization with molecular vibrations of the polymer segments. The effect of rheological parameters like strain rate and temperature on the relative change in shear (RV,) and dynamic elongational (RV,) viscosities is reported for the variation of blend composition with 30 phr loaded black-filled compounds. The variation of both RVS and RV, follows a third order polynomial equation with carbon black loading in 50/50 EVAc/CR blend; all the polynomial constants are function of temperature and strain rate.

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Section: Dynamic Flowmentioning

confidence: 94%

“…The values of i,, and 77, are calculated using eqs. (6) and (7). Shear viscosity (77,) a t 80, 100, and 120°C is plotted against blend composition on a semilog scale in Figure 1.…”

Section: Capillary Flowmentioning

confidence: 99%

See 1 more Smart Citation

Effect of rheological parameters on the miscibility and polymer-filler interactions of the black-filled blends of polyethylene-vinyl acetate and polychloroprene

Kundu

Tripathy

Gupta

1996

J. Appl. Polym. Sci.

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Interpenetrating polymer network of poly(vinyl chloride) and polymethacrylates

Abu‐Isa

1991

J of Applied Polymer Sci

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SYNOPSISA curable polymeric composite was prepared using equal weights of poly (vinyl chloride) ( PVC ) , reactive polyfunctional methacrylate monomers, and inorganic fillers. Peroxide initiated in situ polymerization of the polyfunctional methacrylate monomers in the PVC matrix produced an interpenetrating polymer network ( IPN) structure. The polymerization kinetics and the degree of polymerization were investigated using differential scanning calorimetry (DSC) , carbon-13 nuclear magnetic resonance ( 13C NMR) , and solvent extraction. All measurements indicated that during polymerization, the PVC is either crosslinked by or grafted onto the methacrylate three-dimensional network structure. The rheological properties of the composite were measured before curing using a Rheometrics mechanical spectrometer and found to exhibit mainly viscous behavior and diminished elasticity. The PVC and the methacrylate monomers form a two-phase system when mixed at room temperature. However, when heated to 100°C the PVC dissolves in the monomers and forms a one-phase optically clear blend with a single glass transition temperature. In the presence of peroxide, the one-phase blend is stable and does not separate out upon cooling and storing at room temperature.

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Rheological Behavior of Unvulcanized Rubber

Cited by 2 publications

References 282 publications

Effect of rheological parameters on the miscibility and polymer-filler interactions of the black-filled blends of polyethylene-vinyl acetate and polychloroprene

Effect of rheological parameters on the miscibility and polymer-filler interactions of the black-filled blends of polyethylene-vinyl acetate and polychloroprene

Interpenetrating polymer network of poly(vinyl chloride) and polymethacrylates

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