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Fumed silica concentration effect on structure and dielectric properties of a styrene-cross-linked unsaturated polyester resin
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10.1063/1.4764328
/content/aip/journal/jap/112/9/10.1063/1.4764328
http://aip.metastore.ingenta.com/content/aip/journal/jap/112/9/10.1063/1.4764328

Figures

Image of FIG. 1.
FIG. 1.

Mass-spectra of thermal desorption products at ∼300 K for the unfilled polyester resin (a) and the resin filled with SiO2 of Cf , m  = 0.5% (b).

Image of FIG. 2.
FIG. 2.

Structure formula of elementary link of the styrene cross-linked polyester resin.

Image of FIG. 3.
FIG. 3.

Mass-spectra of thermal desorption products for the polyester resin filled with SiO2 nanoparticles of Cf , m  = 2.5% (a) and 5.0% (b) at ∼ 300 °C.

Image of FIG. 4.
FIG. 4.

Thermal desorption curves for the fragments of m/z = 44 (a) and m/z = 58 (b) for the unfilled polyester resin (the curve 1) and its SiO2-nanocompositesof Cf , m  = 0.5% (2), 2.5% (3) and 5.0% (4).

Image of FIG. 5.
FIG. 5.

Thermal desorption curves for the styrene molecular fragments—C6H4 (m/z = 76) (a), C6H5 (m/z = 77) (b), C6H5CHCH2 (m/z = 104) (с) and C6H5CHCH (m/z = 103) (d)—obtained for the unfilled polyester resin (the curve 1) and its SiO2-nanocomposites of Cf , m  = 0.5% (2), 2.5% (3) and 5.0% (4).

Image of FIG. 6.
FIG. 6.

Concentration dependencies of destruction products of polyester chains for CO (28), COO (44), COOCH2 (58) (a), and styrene cross-links for C6H4 (76), C6H5 (77) and C6HCHCH2 (104) (b).

Image of FIG. 7.
FIG. 7.

Diffuse IR-reflection spectrum for fumed silica nanoparticles.

Image of FIG. 8.
FIG. 8.

The IR-reflection spectra of the unfilled polyester resin (the curve 1) and SiO2-filled polyester resins of Cf , m  = 0.5% (2), 2.5% (3), and 5.0% (4).

Image of FIG. 9.
FIG. 9.

Temperature dependencies of ε 1 at 1.2 kHz (a) and 1.0 MHz (b) for the unfilled UPR (the curves 1) and its SiO2-nanocomposites with Cf , m  = 0.5% (2), 1.5% (3), and 5.0% (4).

Image of FIG. 10.
FIG. 10.

Temperature dependencies of ε 2 at 1.2 kHz (a) and 1.0 MHz (b) for the unfilled polyester resin (1) and its SiO2-nanocomposites with Cf , m  = 0.5% (2), 1.5% (3), and 5.0% (4).

Image of FIG. 11.
FIG. 11.

Frequency dependences of ε 1 obtained by replotting data of Fig. 8 at 201 K (a) and 300 K (b) for the unfilled resin (the curves 1) and its SiO2-nanocomposites with Cf , m  = 0.5% (2), 1.5% (3), and 5.0% (4).

Image of FIG. 12.
FIG. 12.

Frequency dependences of ε 2 obtained by replotting data of Fig. 9 at 201 K (a) and 300 K (b) for the unfilled resin (the curves 1) and its SiO2-nanocomposites with Cf , m  = 0.5% (2), 1.5% (3), and 5.0% (4).

Image of FIG. 13.
FIG. 13.

Concentration dependencies of ε 1 (a) and ε 2 (b) for the polyester resin SiO2-nanocomposites obtained at T = 300 K for 1.2 kHz (the curves 1) and 1.0 MHz (the curves 2).

Tables

Generic image for table
Table I.

Positronium annihilation parameters in polyester resin and its compositions with nanosilica.

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/content/aip/journal/jap/112/9/10.1063/1.4764328
2012-11-12
2014-04-25
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Fumed silica concentration effect on structure and dielectric properties of a styrene-cross-linked unsaturated polyester resin
http://aip.metastore.ingenta.com/content/aip/journal/jap/112/9/10.1063/1.4764328
10.1063/1.4764328
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