Melt Rheology and Its Role in Plastics Processing

Dealy, John M.; Wissbrun, Kurt F.

doi:10.1007/978-1-4615-9738-4

Cited by 488 publications

(495 citation statements)

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“…When the master curves of dynamic material functions are available, one can estimate the beginning of the Newtonian flow from the plot of the loss compliance, J"(). The Newtonian flow (characterized by the constant zero-shear viscosity,  0 ) is represented by the explicit asymptotic term, 1/ 0 , in the loss compliance function [40,41]. Thus, by finding the asymptote of J"(), at low frequencies one can estimate  0 and construct the modified loss compliance function:…”

Section: Resultsmentioning

confidence: 99%

“…The basic assumption of the outlined method is that the tested material is rheologically simple [40,41]. Only if this is the case can one construct the master curves of dynamic material functions, with the help of the time-temperature superposition principle [40,41].…”

Section: Resultsmentioning

confidence: 99%

“…Only if this is the case can one construct the master curves of dynamic material functions, with the help of the time-temperature superposition principle [40,41]. During the process of such construction, the horizontal shifting factors a T are obtained.…”

Section: Resultsmentioning

confidence: 99%

“…During the process of such construction, the horizontal shifting factors a T are obtained. In asphalt samples, a T is quite often described by the Williams-Landel-Ferry (WLF) form [40,41]: (3) where T is the temperature, T r is the reference temperature, and c 1 and c 2 are constants.…”

Section: Resultsmentioning

confidence: 99%

“…Preliminary strain sweep tests were performed in order to ensure that all experimental conditions remained in the linear domain. The test temperature was varied from -40 to 90°C, in order to construct the master curves of the dynamic material functions by using the time-temperature superposition principle [40,41].…”

Section: Conventionalmentioning

confidence: 99%

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Rheological properties of asphalt/SBS/clay blends

Polacco

Kříž

Filippi

et al. 2008

European Polymer Journal

141

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The effect of the addition of clay as a third component in polymer modified asphalts has been investigated. After a preliminary investigation on the binary asphalt/clay and polymer/clay blends, the tertiary blends were prepared by adding the clay and polymer to the asphalt, either separately or in the form of a premixed master batch. Intercalated nanocomposites with comparable interlayer distances and glass transition temperatures were obtained in both cases. However, the results show that the mixing procedure significantly affected the final rheological properties. The master curves built in the linear viscoelastic range and represented in both the frequency and the temperature domains help to visualize and evaluate such differences. Suggested Reviewers:Dear Professor Vancso, I'm submitting the new version, revised according to referees' suggestions. I would like to thank you and the referees for helping us in improving the quality of the paper. AbstractThe effect of the addition of clay as a third component in polymer modified asphalts has been investigated. After a preliminary investigation on the binary asphalt/clay and polymer/clay blends, the tertiary blends were prepared by adding the clay and polymer to the asphalt, either separately or in the form of a premixed master batch. Intercalated nanocomposites with comparable interlayer distances and glass transition temperatures were obtained in both cases. However, the results show that the mixing procedure significantly affected the final rheological properties. The master curves built in the linear viscoelastic range and represented in both the frequency and the temperature domains help to visualize and evaluate such differences.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Conventionalmentioning

confidence: 99%

See 3 more Smart Citations

Rheological properties of asphalt/SBS/clay blends

Polacco

Kříž

Filippi

et al. 2008

European Polymer Journal

141

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Melt strength and film bubble instability of LLDPE/LDPE blends

1999

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The relevance of measuring the melt strength of low density polyethylene (LDPE), linear low density polyethylene (LLDPE) and their blends to their performance in terms of bubble stability in the film blowing process has been investigated. A good correlation between the melt strength values for two series of LLDPE/LDPE blends and the size of the operating window for stable film bubble formation has been established. Both the macromolecular structure of the parent polymers, and melt morphology play an important role in the performance of these blends in the film blowing process. © 1999 Society of Chemical Industry

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Effects of temperature and strain amplitude on dynamic mechanical properties of EPDM gum and its carbon black compounds

Osanaiye

1996

J. Appl. Polym. Sci.

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SYNOPSISThe effects of carbon black loadings cp, temperature T, and shear frequency w on dynamic mechanical properties of EPDM gum elastomer and its carbon black compounds were investigated under sinusoidal shear flows. The region of shear flows where the gum elastomer and its carbon black compounds exhibited characteristic plateau in viscoelastic properties were established and found to directly depend on temperature but were inversely proportional to carbon black loading. The gum rubber and its 20% carbon black compound showed rather unusual similar dynamic flow behaviors a t 50 and 100°C attributed to the possible presence of crystallinity from the fractional ethylene components in the gum. This fraction could act as nucleation sites for macrogels that required higher temperatures than 50 and 100°C for melting, particularly in the presence of carbon black particles. Dynamic properties were amplified due to carbon black filler. This effect was more pronounced at low frequencies and at 50 and 15OoC, respectively. At 100°C, amplifications appeared to have been attenuated by the hydrodynamics of the continuum elastomer matrix. This observation helps the further understanding of the filler-elastomer interactions and the critical role played by temperature, particularly as it affects rubber processors. 0

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Melt Rheology and Its Role in Plastics Processing

Cited by 488 publications

References 0 publications

Rheological properties of asphalt/SBS/clay blends

Rheological properties of asphalt/SBS/clay blends

Melt strength and film bubble instability of LLDPE/LDPE blends

Effects of temperature and strain amplitude on dynamic mechanical properties of EPDM gum and its carbon black compounds

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