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A sensitive method to detect very low levels of long chain branching from the molar mass distribution and linear viscoelastic response
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10.1122/1.2048743
    + View Affiliations - Hide Affiliations
    Affiliations:
    1 Centre for Systems Engineering and Applied Mechanics (CESAME), Université Catholique de Louvain, B-1348 Louvain-la-Neuve, Belgium
    2 Unité de Physique et de Chimie des Hauts Polymères, Université Catholique de Louvain, B-1348 Louvain-la-Neuve, Belgium
    3 Centre for Systems Engineering and Applied Mechanics (CESAME), Université Catholique de Louvain, B-1348 Louvain-la-Neuve, Belgium
    4 Unité de Physique et de Chimie des Hauts Polymères, Université Catholique de Louvain, B-1348 Louvain-la-Neuve, Belgium
    a) Present address: FORTH, Department of Materials Science and Technology, Heraklion, Crete, Greece.
    b) Present address: Total Petrochemicals, Feluy, Belgium.
    c) Author to whom correspondence should be addressed; electronic mail: bailly@poly.ucl.ac.be
    J. Rheol. 49, 1503 (2005); http://dx.doi.org/10.1122/1.2048743
/content/sor/journal/jor2/49/6/10.1122/1.2048743
http://aip.metastore.ingenta.com/content/sor/journal/jor2/49/6/10.1122/1.2048743

Figures

Image of FIG. 1.
FIG. 1.

Effect of thermoreological complexity on the loss modulus vs for pPE. Master curve built from experimental data at (∙∙∙∙), (—), and (---).

Image of FIG. 2.
FIG. 2.

MMDs of zPE (—), pPE (-•-), and mPE (--).

Image of FIG. 3.
FIG. 3.

MMDs of zPE and fractions. Original sample (—), fraction F1 (•••), fraction F2 (---), MMD rebuilt from fractions (-•-). F1 and F2 fractions, respectively, represent 78 and of the total collected matter.

Image of FIG. 4.
FIG. 4.

Storage moduli of zPE (엯엯), pPE (●●), mPE (◻◻), F1 (▴▴), and F2 (▵▵), at .

Image of FIG. 5.
FIG. 5.

Loss moduli of zPE (엯엯), pPE (●●), mPE (◻◻), F1 (▴▴), and F2 (▵▵), at .

Image of FIG. 6.
FIG. 6.

Activation energies spectra ( vs ) of zPE (●●), pPE (∗∗), mPE (◇◇), F1 (엯엯), and F2 (◻◻).

Image of FIG. 7.
FIG. 7.

Zero-shear viscosity (for zPE and F1) or (for pPE, mPE, and F2) vs weight-average MM . The stars are the experimental data and the line represents Eq. (3) shifted to .

Image of FIG. 8.
FIG. 8.

Experimental (엯엯엯) and predicted (—) dynamic moduli using the proposed method for (a) zPE, (b) pPE, (c) mPE, (d) F1, and (e) F2, at . Master curves have been used for zPE and F1.

Tables

Generic image for table
TABLE I.

Main characteristics of all investigated samples.

Generic image for table
TABLE II.

Horizontal flow activation energies for all investigated samples.

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/content/sor/journal/jor2/49/6/10.1122/1.2048743
2005-11-01
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: A sensitive method to detect very low levels of long chain branching from the molar mass distribution and linear viscoelastic response
http://aip.metastore.ingenta.com/content/sor/journal/jor2/49/6/10.1122/1.2048743
10.1122/1.2048743
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