D.W. Van Krevelen, op cit - PowerPoint PPT Presentation

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D.W. Van Krevelen, op cit

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Claus Gabriel and Helmut M nstedt Rheol. Acta 38: 393 ... fortuitous. Carnegie Mellon. 187. Carnegie Mellon. 188. Carnegie Mellon. 189. G. C. Berry J. Polym. ... – PowerPoint PPT presentation

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Title: D.W. Van Krevelen, op cit


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D.W. Van Krevelen, op cit R. F. Boyer, Rubber
Reviews 361303-421
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G. C. Berry J. Rheology 401129-54 (1996)
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Moderately Concentrated Solutions
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Metallocene polyethylenes Claus Gabriel and
Helmut Münstedt Rheol. Acta 38 393-403 (1999)
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Metallocene polyethylenes Claus Gabriel and
Helmut Münstedt Rheol. Acta 38 393-403 (1999)
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Metallocene polyethylenes Claus Gabriel and
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Metallocene polyethylenes Claus Gabriel and
Helmut Münstedt Rheol. Acta 38 393-403 (1999)
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Metallocene polyethylenes Claus Gabriel and
Helmut Münstedt Rheol. Acta 38 393-403 (1999)
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From creep/recovery
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170 nm beads (0.05 to 0.2 volume fraction), in
15 polystyrene solution D. Meitz, L. Yen, G. C.
Berry and H. Markovitz J. Rheol. 32309-51
(1988)
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Cetyl triethylammonium tosylate
CTA -T
hydrophobic


hydrophilic
micelles grow 10 nm
micellar network
Schematic courtesy Dr. Lynn M. Walker
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These data reveal several deviations from simple
Maxwell behavior, including ? The rate of
decrease of h'(w) with increasing w for larger
w, to the extent of an increase in h'(w) with
increasing w for the data on the less
concentrated Sample ? The increase of J'(w)
above the imputed Js for smaller w for the data
on the more concentrated sample ? It may be
likely that these samples exhibit solid-like
behavior with a Je at smaller w than the
experimental range, and that Jp is truly Js ?
The relatively constant J'(w) is expected with
the Maxwell model, but this may be fortuitous
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J. F. A. Soltero and J. E. Puig Langmuir 12
141-8 (1996)
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G. C. Berry J. Polym. Sci. Polym. Phys. Ed.
14451-78 (1976)
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Linear and nonlinear behavior for a polymer with
a relatively narrow MWD
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