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Linear viscoelastic properties of ethylene–octene copolymer/nanosilica composites investigated over a broad range of frequencies
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10.1122/1.4774405
/content/sor/journal/jor2/57/2/10.1122/1.4774405
http://aip.metastore.ingenta.com/content/sor/journal/jor2/57/2/10.1122/1.4774405

Figures

Image of FIG. 1.
FIG. 1.

TEM images of composites containing 5 wt. % SiO2 before and after a 5000 s time sweep experiment, at 5% strain and 0.1 Hz. (a) EOC/SiO2; (b) (EOC/EOC-g-MA)/SiO2; (c) EOC/SiO2 after time sweep; (d) (EOC/EOC-g-MA)/SiO2 after time sweep.

Image of FIG. 2.
FIG. 2.

Strain-sweeps at 0.1 Hz and 100 °C; (⋄) EOC, (♦) EOC/5 wt. % SiO2, (▪) (EOC/EOC-g-MA)/5 wt. % SiO2.

Image of FIG. 3.
FIG. 3.

Time sweeps showing the evolution of the storage modulus, G′(t) as a function of time, normalized with respect to the modulus at time 0 ( ) at 100 °C under a 5% strain and 0.1 Hz (0.7 rad/s) for EOC and EOC/EOC-g-MA based composites containing 5 wt. % SiO2.

Image of FIG. 4.
FIG. 4.

Dynamic oscillatory properties for (EOC/EOC-g-MA)/SiO2 composites at 100 °C: (⋄) EOC/EOC-g-MA; (□) (EOC/EOC-g-MA)/2 wt. % SiO2; (△) (EOC/EOC-g-MA)/5 wt. % SiO2.

Image of FIG. 5.
FIG. 5.

Creep compliance, Jc, and creep recovery compliance, Jr, for (EOC/EOC-g-MA)/SiO2 composites at 100 °C: (__) EOC/EOC-g-MA; (---) (EOC/EOC-g-MA)/2 wt. % SiO2; (….) (EOC/EOC-g-MA)/5 wt. % SiO2.

Image of FIG. 6.
FIG. 6.

Superposition of complex viscosity data from SAOS experiments (points) and t/J data from creep/recovery experiments (lines) for (EOC/EOC-g-MA)/SiO2 composites at 100 °C: (⋄) EOC/EOC-g-MA; (□) (EOC/EOC-g-MA)/2 wt. % SiO2; (△) (EOC/EOC-g-MA)/5 wt. % SiO2; (__) EOC/EOC-g-MA; (---) (EOC/EOC-g-MA)/2 wt. % SiO2; (….) (EOC/EOC-g-MA)/5 wt. % SiO2.

Image of FIG. 7.
FIG. 7.

Retardation spectra obtained from creep/recovery (lines) and SAOS data (points): (□) (EOC/EOC-g-MA)/2 wt. % SiO2; (△) (EOC/EOC-g-MA)/5 wt. % SiO2; (---) (EOC/EOC-g-MA)/2 wt. % SiO2; (__) (EOC/EOC-g-MA)/5 wt. % SiO2.

Image of FIG. 8.
FIG. 8.

Superposition of SAOS data (points) and NLREG fits (lines) generated from creep and creep recovery data; (⋄) EOC/EOC-g-MA; (□) (EOC/EOC-g-MA)/2 wt. % SiO2; (△) (EOC/EOC-g-MA)/5 wt. % SiO2.

Image of FIG. 9.
FIG. 9.

Dynamic oscillatory properties for EOC/SiO2 composites at 100 °C: (⋄) EOC; (□) EOC/2 wt. % SiO2; (△) EOC/5 wt. % SiO2.

Image of FIG. 10.
FIG. 10.

Normalized complex viscosities with respect to the matrix viscosity at 100 °C: (x) (EOC/EOC-g-MA)/2 wt. % SiO2; (-) EOC/2 wt. % SiO2; (△) (EOC/EOC-g-MA)/5 wt. % SiO2; (♦) EOC/5 wt. % SiO2.

Image of FIG. 11.
FIG. 11.

Creep compliance, Jc, for EOC/SiO2 composites at 100 °C: (__) EOC; (---) EOC/2 wt. % SiO2; (….) EOC/5 wt. % SiO2.

Image of FIG. 12.
FIG. 12.

Superposition of SAOS data (points) and NLREG fits (lines) generated from creep and creep recovery data; (⋄) EOC; (□) EOC/2 wt. % SiO2; (△) EOC/5 wt. % SiO2.

Image of FIG. 13.
FIG. 13.

Continuous relaxation spectra obtained by combining SAOS (data points) and creep (lines) experiments: (○) EOC/2 wt. % SiO2; (▪) (EOC/EOC-g-MA)/2 wt. % SiO2; (△) (EOC-g-MA)/5 wt. % SiO2; (⋄) EOC/5 wt. % SiO2.

Image of FIG. 14.
FIG. 14.

Conceptual illustration of SiO2 particle aggregates, showing the formation of large aggregates dispersed within the EOC matrix (a); and the presence of smaller aggregates, surrounded by a bound polymer shell within the EOC/EOC-g-MA compatibilized matrix (b).

Tables

Generic image for table
TABLE I.

Conditions of creep/creep recovery measurements.

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/content/sor/journal/jor2/57/2/10.1122/1.4774405
2013-01-14
2014-04-20
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Linear viscoelastic properties of ethylene–octene copolymer/nanosilica composites investigated over a broad range of frequencies
http://aip.metastore.ingenta.com/content/sor/journal/jor2/57/2/10.1122/1.4774405
10.1122/1.4774405
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