TY  - JOUR
AU  - Nikolić, Marija S.
AU  - Mitrić, Miodrag
AU  - Dapčević, Aleksandra
AU  - Đonlagić, Jasna A.
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/790
AB  - Viscoelastic properties in solid and in melt state of poly(epsilon-caprolactone), PCL, nanocomposites with organomodified clays (Cloisite30B and Cloisite15A) are thoroughly investigated. Although WAXD is insensitive to the difference in the nanocomposites structure, the melt rheology reveals pronounced differences between the two series. Melt yield stress values, obtained from fittings by the Carreau-Yasuda model, are used as a measure of partial exfoliation of the clay. Temperature dependence of the shift factors, used for time-temperature superposition of the modulus curves, yields similar values of the flow activation energies for all the samples. Temperature dependences of the dynamic modulus and loss factor of solid nanocomposites were correlated to the structural differences deduced from the melt rheology. The increase in the storage modulus is compared to the theoretical predictions from the Hal-pin-Tsai model. The effective aspect ratio obtained from this comparison agrees reasonably with the value estimated from the melt rheology. (C) 2015 Wiley Periodicals, Inc.
T2  - Journal of Applied Polymer Science
T1  - Viscoelastic properties of poly(e-caprolactone)/clay nanocomposites in solid and in melt state
VL  - 133
IS  - 3
DO  - 10.1002/app.42896
ER  - 

@article{
author = "Nikolić, Marija S. and Mitrić, Miodrag and Dapčević, Aleksandra and Đonlagić, Jasna A.",
year = "2016",
abstract = "Viscoelastic properties in solid and in melt state of poly(epsilon-caprolactone), PCL, nanocomposites with organomodified clays (Cloisite30B and Cloisite15A) are thoroughly investigated. Although WAXD is insensitive to the difference in the nanocomposites structure, the melt rheology reveals pronounced differences between the two series. Melt yield stress values, obtained from fittings by the Carreau-Yasuda model, are used as a measure of partial exfoliation of the clay. Temperature dependence of the shift factors, used for time-temperature superposition of the modulus curves, yields similar values of the flow activation energies for all the samples. Temperature dependences of the dynamic modulus and loss factor of solid nanocomposites were correlated to the structural differences deduced from the melt rheology. The increase in the storage modulus is compared to the theoretical predictions from the Hal-pin-Tsai model. The effective aspect ratio obtained from this comparison agrees reasonably with the value estimated from the melt rheology. (C) 2015 Wiley Periodicals, Inc.",
journal = "Journal of Applied Polymer Science",
title = "Viscoelastic properties of poly(e-caprolactone)/clay nanocomposites in solid and in melt state",
volume = "133",
number = "3",
doi = "10.1002/app.42896"
}

Nikolić, M. S., Mitrić, M., Dapčević, A.,& Đonlagić, J. A.. (2016). Viscoelastic properties of poly(e-caprolactone)/clay nanocomposites in solid and in melt state. in Journal of Applied Polymer Science, 133(3).
https://doi.org/10.1002/app.42896

Nikolić MS, Mitrić M, Dapčević A, Đonlagić JA. Viscoelastic properties of poly(e-caprolactone)/clay nanocomposites in solid and in melt state. in Journal of Applied Polymer Science. 2016;133(3).
doi:10.1002/app.42896 .

Nikolić, Marija S., Mitrić, Miodrag, Dapčević, Aleksandra, Đonlagić, Jasna A., "Viscoelastic properties of poly(e-caprolactone)/clay nanocomposites in solid and in melt state" in Journal of Applied Polymer Science, 133, no. 3 (2016),
https://doi.org/10.1002/app.42896 . .

TY  - JOUR
AU  - Bučevac, Dušan
AU  - Dapcevic, Aleksandra
AU  - Maksimović, Vesna
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5896
AB  - Porous acicular mullite was fabricated by using waste MoSi2 heating element and Al2O3. Careful calcination of the pulverized heating element led to the formation of a mixture of MoO3 and amorphous SiO2. This mixture was employed as both SiO2 precursor and pore former. The oxidation of MoSi2 and mullite formation were studied. The effect of fabrication temperature on phase composition, porosity, grain morphology, and compressive strength of sintered mullite was examined. Pure mullite with porosity of more than 60% and compressive strength of similar to 20 MPa was obtained at temperature as low as 1300 degrees C. The microstructure consisted of elongated, rectangular, prism-like grains which are known to be effective in filtration of diesel engine exhaust. The increase in sintering temperature caused the change of grain morphology and reduction in compressive strength. (C) 2013 Published by Elsevier Ltd.
T2  - Materials Research Bulletin
T1  - Porous acicular mullite obtained by controlled oxidation of waste molybdenum disilicide
VL  - 50
SP  - 155
EP  - 160
DO  - 10.1016/j.materresbull.2013.10.044
ER  - 

@article{
author = "Bučevac, Dušan and Dapcevic, Aleksandra and Maksimović, Vesna",
year = "2014",
abstract = "Porous acicular mullite was fabricated by using waste MoSi2 heating element and Al2O3. Careful calcination of the pulverized heating element led to the formation of a mixture of MoO3 and amorphous SiO2. This mixture was employed as both SiO2 precursor and pore former. The oxidation of MoSi2 and mullite formation were studied. The effect of fabrication temperature on phase composition, porosity, grain morphology, and compressive strength of sintered mullite was examined. Pure mullite with porosity of more than 60% and compressive strength of similar to 20 MPa was obtained at temperature as low as 1300 degrees C. The microstructure consisted of elongated, rectangular, prism-like grains which are known to be effective in filtration of diesel engine exhaust. The increase in sintering temperature caused the change of grain morphology and reduction in compressive strength. (C) 2013 Published by Elsevier Ltd.",
journal = "Materials Research Bulletin",
title = "Porous acicular mullite obtained by controlled oxidation of waste molybdenum disilicide",
volume = "50",
pages = "155-160",
doi = "10.1016/j.materresbull.2013.10.044"
}

Bučevac, D., Dapcevic, A.,& Maksimović, V.. (2014). Porous acicular mullite obtained by controlled oxidation of waste molybdenum disilicide. in Materials Research Bulletin, 50, 155-160.
https://doi.org/10.1016/j.materresbull.2013.10.044

Bučevac D, Dapcevic A, Maksimović V. Porous acicular mullite obtained by controlled oxidation of waste molybdenum disilicide. in Materials Research Bulletin. 2014;50:155-160.
doi:10.1016/j.materresbull.2013.10.044 .

Bučevac, Dušan, Dapcevic, Aleksandra, Maksimović, Vesna, "Porous acicular mullite obtained by controlled oxidation of waste molybdenum disilicide" in Materials Research Bulletin, 50 (2014):155-160,
https://doi.org/10.1016/j.materresbull.2013.10.044 . .