Modified main groups metal oxides as potential active fillers for polymers

Kijeński, J.; Osawaru, Osazuwa

doi:10.14314/polimery.2006.115

Cited by 8 publications

(3 citation statements)

References 26 publications

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“…On the other hand, we know that oxygen vacancies are the main defects type observed in TCOs [32,33]. This defects type could be identified in Sb 2 O 3 photoluminescence spectra: the vacancies can recombine with electrons and give rise to an emission band in 2,92 eV [19].…”

Section: Discussionmentioning

confidence: 98%

Synthesis and characterization of microstructures of Sb2O3

Gonçalves¹,

Silva²,

Baldan³

et al. 2017

Brazilian Workshop on Semiconductor Physics

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In this work, we synthesized microstructures of antimony oxide by carbothermal reduction process associated with the vapor-solid (VS) mechanism. The samples were characterized by Field Effect Gun Scanning Electron Microscopy (FEG-SEM), X-ray Diffraction (XRD) and Raman Spectroscopy. FEG-SEM images show that the structures collected in the hottest zone of growth (760-630°C) are mainly composed by belts with branched morphology while in the cooler zone of growth (510-440°C) crystals with dendritic structure and Diffraction data showed that these samples were grown in the cubic phase and orthorhombic phase of Sb2O3, respectively. The diffractogram presented evidence that the microstructures of Sb2O3 are single crystals with crystalline quality and with preferential growth orientation. Raman spectroscopy confirmed the crystalline quality of the samples and also that samples grow in different phases of antimony trioxide, cubic and orthorhombic. Raman measurements showed a break in the selection rules for the orthorhombic phase of Sb2O3 (branched belts). This effect is probably associated with intrinsic defects in the structure of the belts such as oxygen vacancies.

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Section: Discussionmentioning

confidence: 98%

Synthesis and characterization of microstructures of Sb2O3

Gonçalves¹,

Silva²,

Baldan³

et al. 2017

Brazilian Workshop on Semiconductor Physics

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“…The above equation is volume-fraction independent and needs to incorporate the concentration. In the case of Newtonian medium, the modified Bingham model is expressed as: (4) where: µ M -Newtonian viscosity of polymer matrix.…”

Section: Rheological Properties Of Highly Filled Systems Showing the mentioning

confidence: 99%

“…Filled thermoplastics with short fibres belong to a new class of engineering materials with high commer-cial importance [1][2][3][4][5]. Compared to pure polymers, these materials possess improved physical properties, such as stiffness and strength.…”

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confidence: 99%

Rheological behavior of fiber-filled polymer melts at low shear rate. Part. I. Modeling of rheological properties

Hausnerová

Honková²,

Lengalova³

et al. 2008

Polimery

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In this review the models applied for the description of non-Newtonian liquids were presented. Highly filled polymer melts showing distinct yield stress are such liquids. The effects of forces of geometrical and physical interactions among the filler particles on the properties were discussed. These interactions forces depend on the type, size and shape of filler particles and in case of fibers also on their orientation. The deformations and flow of fibers assemblies in the melt under shear stress were discussed. The equations used for description of three-or two-dimensionally oriented fibers sets are presented. Key words: polymer melt, filler, modeling of rheological properties, viscosity, yield stress, shear rate.CHARAKTERYSTYKA REOLOGICZNA W ZAKRESIE MA£YCH SZYBKOOECI OECINANIA STOPÓW POLIMERÓW NAPE£NIONYCH W£ÓKNAMI. Cz. I. MODELOWANIE W£AOECIWOOECI REOLO-GICZNYCH Streszczenie -W pracy przegl¹dowej przedstawiono modele stosowane do opisu w³aoeciwooeci reologicznych cieczy nienewtonowskich, którymi s¹ stopy polimerów o wysokim stopniu nape³nienia wykazuj¹ce wyraŸn¹ granicê plastycznooeci. Omówiono wp³yw na omawiane w³aoeciwooeci si³ oddzia-³ywañ geometrycznych i fizycznych miêdzy cz¹stkami nape³niacza. Si³y tych oddzia³ywañ zale¿¹ od rodzaju, wielkooeci i kszta³tu cz¹stek nape³niacza, a w przypadku w³ókien, tak¿e od ich orientacji. Przedyskutowano tak¿e deformacje i przep³yw zespo³ów w³ókien w stopie pod wp³ywem naprê¿eñ oecinaj¹cych. Przedstawiono równanie stosowane w przypadku zespo³ów w³ókien o orientacji trójwymiarowej oraz dwuwymiarowej. S³owa kluczowe: stop polimeru, nape³niacz, modelowanie w³aoeciwooeci reologicznych, lepkooeae, granica plastycznooeci, szybkooeae oecinania.

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