TY  - JOUR
AU  - Mihajlović, Slavica
AU  - Sekulić, Živko
AU  - Kolonja, Božo M.
AU  - Radulović, Dragan
PY  - 2015
UR  - https://ritnms.itnms.ac.rs/handle/123456789/340
AB  - U suspenziji kalcita i vode, čiji je pH 10,14, na granici kalcit/voda formirao se dvojni električni sloj. Njegova struktura, odnosno hidrofilne osobine minerala, su zavisile od koncentracije potencijal određujućih jona, Ca2+ i 2 CO 3 , pH sredine i adsorpcije molekula vode i jona (i molekula) formiranih u suspenziji kalcita usled njegove rastvorljivosti u alkalnoj sredini. Struktura tako formiranog dvojnog električnog sloja je uticala na interakciju minerala sa stearinskom kiselinom kao površinski aktivnom materijom. U prisustvu stearinske kiseline pH vrednost suspenzije je opadala do 8,72 zbog disocijacije stearinske kiseline u alkalnoj sredini i reakcije neutralizacije. Kao posledica disocijacije u suspenziji su se pored nedisosovanih molekula kiseline nalazili u određenoj koncentraciji i stearatni joni CH3(CH2)16COO-, (St-) koji su reagovali sa površinom minerala prevodeći je iz hidrofilne u hidrofobnu.
AB  - In the suspension of water and calcite, with pH 10.14, on the border of calcite / water was formed a double electric layer. Its structure, or hydrophilic properties of minerals, depended on the concentration of potential determination ions, Ca2+ i 2 CO3 , pH of the environment, and the adsorption of water molecules and ions (and molecules), formed in a suspension of calcite as a result of its solubility in alkaline media. The structure of such a way formed electrical double layer, influenced on interaction of minerals with stearic acid as a surface of active substance. In the presence of stearic acid, the pH value of slurry decreased to 8.72 due to the dissociation of stearic acid in alkaline medium and reaction of neutralization. As the result of dissociation, in the suspension, besides the un-dissociated acid molecules, there were also stearine ions CH3(CH2)16COO-, (St-), which have reacted with the surface of minerals, transforming it from hydrophilic to hydrophobic.
PB  - Institut za rudarstvo i metalurgiju, Bor
T2  - Mining and Metallurgy Engineering Bor
T1  - Reakcije kalcita u vodi i u prisustvu stearinske kiseline
T1  - Reactions of calcite in water in the presence of stearic acid
EP  - 144
IS  - 3
SP  - 129
DO  - 10.5937/mmeb1503129m
UR  - conv_420
ER  - 

@article{
author = "Mihajlović, Slavica and Sekulić, Živko and Kolonja, Božo M. and Radulović, Dragan",
year = "2015",
abstract = "U suspenziji kalcita i vode, čiji je pH 10,14, na granici kalcit/voda formirao se dvojni električni sloj. Njegova struktura, odnosno hidrofilne osobine minerala, su zavisile od koncentracije potencijal određujućih jona, Ca2+ i 2 CO 3 , pH sredine i adsorpcije molekula vode i jona (i molekula) formiranih u suspenziji kalcita usled njegove rastvorljivosti u alkalnoj sredini. Struktura tako formiranog dvojnog električnog sloja je uticala na interakciju minerala sa stearinskom kiselinom kao površinski aktivnom materijom. U prisustvu stearinske kiseline pH vrednost suspenzije je opadala do 8,72 zbog disocijacije stearinske kiseline u alkalnoj sredini i reakcije neutralizacije. Kao posledica disocijacije u suspenziji su se pored nedisosovanih molekula kiseline nalazili u određenoj koncentraciji i stearatni joni CH3(CH2)16COO-, (St-) koji su reagovali sa površinom minerala prevodeći je iz hidrofilne u hidrofobnu., In the suspension of water and calcite, with pH 10.14, on the border of calcite / water was formed a double electric layer. Its structure, or hydrophilic properties of minerals, depended on the concentration of potential determination ions, Ca2+ i 2 CO3 , pH of the environment, and the adsorption of water molecules and ions (and molecules), formed in a suspension of calcite as a result of its solubility in alkaline media. The structure of such a way formed electrical double layer, influenced on interaction of minerals with stearic acid as a surface of active substance. In the presence of stearic acid, the pH value of slurry decreased to 8.72 due to the dissociation of stearic acid in alkaline medium and reaction of neutralization. As the result of dissociation, in the suspension, besides the un-dissociated acid molecules, there were also stearine ions CH3(CH2)16COO-, (St-), which have reacted with the surface of minerals, transforming it from hydrophilic to hydrophobic.",
publisher = "Institut za rudarstvo i metalurgiju, Bor",
journal = "Mining and Metallurgy Engineering Bor",
title = "Reakcije kalcita u vodi i u prisustvu stearinske kiseline, Reactions of calcite in water in the presence of stearic acid",
pages = "144-129",
number = "3",
doi = "10.5937/mmeb1503129m",
url = "conv_420"
}

Mihajlović, S., Sekulić, Ž., Kolonja, B. M.,& Radulović, D.. (2015). Reakcije kalcita u vodi i u prisustvu stearinske kiseline. in Mining and Metallurgy Engineering Bor
Institut za rudarstvo i metalurgiju, Bor.(3), 129-144.
https://doi.org/10.5937/mmeb1503129m
conv_420

Mihajlović S, Sekulić Ž, Kolonja BM, Radulović D. Reakcije kalcita u vodi i u prisustvu stearinske kiseline. in Mining and Metallurgy Engineering Bor. 2015;(3):129-144.
doi:10.5937/mmeb1503129m
conv_420 .

Mihajlović, Slavica, Sekulić, Živko, Kolonja, Božo M., Radulović, Dragan, "Reakcije kalcita u vodi i u prisustvu stearinske kiseline" in Mining and Metallurgy Engineering Bor, no. 3 (2015):129-144,
https://doi.org/10.5937/mmeb1503129m .,
conv_420 .

TY  - JOUR
AU  - Sekulić, Živko
AU  - Kolonja, Božo M.
AU  - Kragović, Milan
AU  - Ivošević, Branislav
AU  - Mihajlović, Slavica
PY  - 2014
UR  - https://ritnms.itnms.ac.rs/handle/123456789/312
AB  - Testing of the quality of zeolite from the Igros and Donje Jesenje deposits was carried out by size classes. The objective of the testing was to point out the importance of the selection of the preparation procedure in determining the quality of individual size classes provide the required quality of zeolite product range. The results indicate that the Igros and Donje Jesenje zeolite deposits differ by the quality of some size classes. While the Igros sample has better quality of fine size classes, in the case of the Donje Jesenje deposit, the sample size class -2.4 +0.4 mm indicates better quality. Specifically, the cation exchange capacity (CEC) of the Igros zeolite is the highest at 161.25 meq/100g in the case of size class -5 +2.4 mm, while the highest CEC of zeolite from the Donje Jesenje deposits, 163.97 meq/100g, was found for the class -0.4 +0.063 mm. The results of XRD analyses showed that the mineral content was distributed differently in the Igros sample relative to the Donje Jesenje sample. The XRPD results showed a higher content of zeolite minerals in coarse size classes of the Igros sample, while in the Donje Jasenje zeolite, the size class of -0.063 +0 mm, and the presence of feldspar and lower content of clinoptilotite were observed. These results indicate that it is necessary to use the methods for obtaining finer size classes and classification in order to achieve the required quality of zeolite product range.
PB  - Polska Akad Nauk, Polish Acad Sciences, Miner & Energy Econ Res Inst Pas, Warszawa
T2  - Gospodarka Surowcami Mineralnymi-Mineral Resources Management
T1  - Quality of Zeolite in the Function of Size Class
EP  - 16
IS  - 3
SP  - 5
VL  - 30
DO  - 10.2478/gospo-2014-0028
UR  - conv_707
ER  - 

@article{
author = "Sekulić, Živko and Kolonja, Božo M. and Kragović, Milan and Ivošević, Branislav and Mihajlović, Slavica",
year = "2014",
abstract = "Testing of the quality of zeolite from the Igros and Donje Jesenje deposits was carried out by size classes. The objective of the testing was to point out the importance of the selection of the preparation procedure in determining the quality of individual size classes provide the required quality of zeolite product range. The results indicate that the Igros and Donje Jesenje zeolite deposits differ by the quality of some size classes. While the Igros sample has better quality of fine size classes, in the case of the Donje Jesenje deposit, the sample size class -2.4 +0.4 mm indicates better quality. Specifically, the cation exchange capacity (CEC) of the Igros zeolite is the highest at 161.25 meq/100g in the case of size class -5 +2.4 mm, while the highest CEC of zeolite from the Donje Jesenje deposits, 163.97 meq/100g, was found for the class -0.4 +0.063 mm. The results of XRD analyses showed that the mineral content was distributed differently in the Igros sample relative to the Donje Jesenje sample. The XRPD results showed a higher content of zeolite minerals in coarse size classes of the Igros sample, while in the Donje Jasenje zeolite, the size class of -0.063 +0 mm, and the presence of feldspar and lower content of clinoptilotite were observed. These results indicate that it is necessary to use the methods for obtaining finer size classes and classification in order to achieve the required quality of zeolite product range.",
publisher = "Polska Akad Nauk, Polish Acad Sciences, Miner & Energy Econ Res Inst Pas, Warszawa",
journal = "Gospodarka Surowcami Mineralnymi-Mineral Resources Management",
title = "Quality of Zeolite in the Function of Size Class",
pages = "16-5",
number = "3",
volume = "30",
doi = "10.2478/gospo-2014-0028",
url = "conv_707"
}

Sekulić, Ž., Kolonja, B. M., Kragović, M., Ivošević, B.,& Mihajlović, S.. (2014). Quality of Zeolite in the Function of Size Class. in Gospodarka Surowcami Mineralnymi-Mineral Resources Management
Polska Akad Nauk, Polish Acad Sciences, Miner & Energy Econ Res Inst Pas, Warszawa., 30(3), 5-16.
https://doi.org/10.2478/gospo-2014-0028
conv_707

Sekulić Ž, Kolonja BM, Kragović M, Ivošević B, Mihajlović S. Quality of Zeolite in the Function of Size Class. in Gospodarka Surowcami Mineralnymi-Mineral Resources Management. 2014;30(3):5-16.
doi:10.2478/gospo-2014-0028
conv_707 .

Sekulić, Živko, Kolonja, Božo M., Kragović, Milan, Ivošević, Branislav, Mihajlović, Slavica, "Quality of Zeolite in the Function of Size Class" in Gospodarka Surowcami Mineralnymi-Mineral Resources Management, 30, no. 3 (2014):5-16,
https://doi.org/10.2478/gospo-2014-0028 .,
conv_707 .

TY  - JOUR
AU  - Sekulić, Živko
AU  - Kragović, Milan
AU  - Kolonja, Božo M.
AU  - Terzić, Anja
AU  - Mihajlović, Slavica
PY  - 2014
UR  - https://ritnms.itnms.ac.rs/handle/123456789/291
PB  - Bauverlag BV GmbH
T2  - ZKG International
T1  - Natural, modified and saturated zeolites as additives in Portland cement
EP  - 56
IS  - 12
SP  - 49
VL  - 67
UR  - https://hdl.handle.net/21.15107/rcub_rims_249
UR  - conv_1047
ER  - 

@article{
author = "Sekulić, Živko and Kragović, Milan and Kolonja, Božo M. and Terzić, Anja and Mihajlović, Slavica",
year = "2014",
publisher = "Bauverlag BV GmbH",
journal = "ZKG International",
title = "Natural, modified and saturated zeolites as additives in Portland cement",
pages = "56-49",
number = "12",
volume = "67",
url = "https://hdl.handle.net/21.15107/rcub_rims_249, conv_1047"
}

Sekulić, Ž., Kragović, M., Kolonja, B. M., Terzić, A.,& Mihajlović, S.. (2014). Natural, modified and saturated zeolites as additives in Portland cement. in ZKG International
Bauverlag BV GmbH., 67(12), 49-56.
https://hdl.handle.net/21.15107/rcub_rims_249

Sekulić Ž, Kragović M, Kolonja BM, Terzić A, Mihajlović S. Natural, modified and saturated zeolites as additives in Portland cement. in ZKG International. 2014;67(12):49-56.
https://hdl.handle.net/21.15107/rcub_rims_249 .

Sekulić, Živko, Kragović, Milan, Kolonja, Božo M., Terzić, Anja, Mihajlović, Slavica, "Natural, modified and saturated zeolites as additives in Portland cement" in ZKG International, 67, no. 12 (2014):49-56,
https://hdl.handle.net/21.15107/rcub_rims_249 .

TY  - JOUR
AU  - Sekulić, Živko
AU  - Daković, Aleksandra
AU  - Kragović, Milan
AU  - Marković, Marija
AU  - Ivošević, Branislav
AU  - Kolonja, Božo M.
PY  - 2013
UR  - https://ritnms.itnms.ac.rs/handle/123456789/276
AB  - Obavljena su ispitivanja kvaliteta polaznog uzorka i kvaliteta pojedinih klasa krupnoće na uzorku prirodnog zeolita iz ležišta Zlatokop (okolina Vranjske Banje, Srbija). Cilj ispitivanja je bio da se utvrdi homogenost kvaliteta zeolita u pogledu klasa krupnoće i da li se odvajanjem neke klase lošijeg kvaliteta može izdvojiti klasa sa višim sadržajem osnovnog minerala - klinoptilolita. Karakterizacija polaznog zeolita, kao i određenih klasa krupnoće je urađena određivanjem hemijskog sastava, sadržaja oksida CaO+MgO+Na2O+K2O kao i kapaciteta katjonske izmene (KKI) kao i korišćenjem XRD analize. Dobijeni rezultati su ukazali da sve analizirane klase krupnoće (-2+0,8; -0,8+0,6; -0,6+0,4; -0,4+0,1; -0,1+0; -0,3+0,63; -0,63+0 i -0,43+0 mm) imaju dobar kvalitet. Najveće vrednosti kapaciteta katjonske izmene (KKI) imaju klase -0,043+0mm (166,5 meq/100 g) i -0,063+0 mm (158,8 meq/100 g). Rezultati su ukazali da nešto bolji kvalitet zeolita se može postići kada se ove klase izdvajaju prosejavanjem iz polaznog uzorka nego kada se iste dobiju mlevenjem polaznog uzorka na tu finoću.
AB  - This paper presents the results of investigations of the quality of the natural zeolite as well as the quality of specific particle size classes of the natural zeolite. The aim of the investigations was to determine if the different classes possess different qualities. The starting material used in experiments was the natural zeolite from the Zlatokop deposit (Vranjska Banja, Serbia). The classes -0.2+0.8 mm; -0.8+0.6 mm; -0.6+0.4 mm; -0.4+0.1 mm were obtained by wet sieving of the natural zeolite. Grinding processes of the natural zeolite gave classes -0.3+0.63 mm; -0.63+0 mm; -0,43+0 mm. Chemical composition, mineralogical XRPD and cation exchange capacities (CEC) were analyzed for the starting sample and the obtained particle size classes. It was determined that all particle size classes possess similar qualities. The highest cation exchange capacity was observed in classes -0.043+0 mm (166.5 meq/100 g) and -0.063+0 mm (158.8 meq/100 g).
PB  - Savez hemijskih inženjera, Beograd
T2  - Hemijska industrija
T1  - Kvalitet zeolita iz ležišta Vranjska banja po klasama krupnoće
T1  - Quality of zeolit from Vranjska banja deposit according to size classes
EP  - 669
IS  - 4
SP  - 663
VL  - 67
DO  - 10.2298/HEMIND120724107S
UR  - conv_300
ER  - 

@article{
author = "Sekulić, Živko and Daković, Aleksandra and Kragović, Milan and Marković, Marija and Ivošević, Branislav and Kolonja, Božo M.",
year = "2013",
abstract = "Obavljena su ispitivanja kvaliteta polaznog uzorka i kvaliteta pojedinih klasa krupnoće na uzorku prirodnog zeolita iz ležišta Zlatokop (okolina Vranjske Banje, Srbija). Cilj ispitivanja je bio da se utvrdi homogenost kvaliteta zeolita u pogledu klasa krupnoće i da li se odvajanjem neke klase lošijeg kvaliteta može izdvojiti klasa sa višim sadržajem osnovnog minerala - klinoptilolita. Karakterizacija polaznog zeolita, kao i određenih klasa krupnoće je urađena određivanjem hemijskog sastava, sadržaja oksida CaO+MgO+Na2O+K2O kao i kapaciteta katjonske izmene (KKI) kao i korišćenjem XRD analize. Dobijeni rezultati su ukazali da sve analizirane klase krupnoće (-2+0,8; -0,8+0,6; -0,6+0,4; -0,4+0,1; -0,1+0; -0,3+0,63; -0,63+0 i -0,43+0 mm) imaju dobar kvalitet. Najveće vrednosti kapaciteta katjonske izmene (KKI) imaju klase -0,043+0mm (166,5 meq/100 g) i -0,063+0 mm (158,8 meq/100 g). Rezultati su ukazali da nešto bolji kvalitet zeolita se može postići kada se ove klase izdvajaju prosejavanjem iz polaznog uzorka nego kada se iste dobiju mlevenjem polaznog uzorka na tu finoću., This paper presents the results of investigations of the quality of the natural zeolite as well as the quality of specific particle size classes of the natural zeolite. The aim of the investigations was to determine if the different classes possess different qualities. The starting material used in experiments was the natural zeolite from the Zlatokop deposit (Vranjska Banja, Serbia). The classes -0.2+0.8 mm; -0.8+0.6 mm; -0.6+0.4 mm; -0.4+0.1 mm were obtained by wet sieving of the natural zeolite. Grinding processes of the natural zeolite gave classes -0.3+0.63 mm; -0.63+0 mm; -0,43+0 mm. Chemical composition, mineralogical XRPD and cation exchange capacities (CEC) were analyzed for the starting sample and the obtained particle size classes. It was determined that all particle size classes possess similar qualities. The highest cation exchange capacity was observed in classes -0.043+0 mm (166.5 meq/100 g) and -0.063+0 mm (158.8 meq/100 g).",
publisher = "Savez hemijskih inženjera, Beograd",
journal = "Hemijska industrija",
title = "Kvalitet zeolita iz ležišta Vranjska banja po klasama krupnoće, Quality of zeolit from Vranjska banja deposit according to size classes",
pages = "669-663",
number = "4",
volume = "67",
doi = "10.2298/HEMIND120724107S",
url = "conv_300"
}

Sekulić, Ž., Daković, A., Kragović, M., Marković, M., Ivošević, B.,& Kolonja, B. M.. (2013). Kvalitet zeolita iz ležišta Vranjska banja po klasama krupnoće. in Hemijska industrija
Savez hemijskih inženjera, Beograd., 67(4), 663-669.
https://doi.org/10.2298/HEMIND120724107S
conv_300

Sekulić Ž, Daković A, Kragović M, Marković M, Ivošević B, Kolonja BM. Kvalitet zeolita iz ležišta Vranjska banja po klasama krupnoće. in Hemijska industrija. 2013;67(4):663-669.
doi:10.2298/HEMIND120724107S
conv_300 .

Sekulić, Živko, Daković, Aleksandra, Kragović, Milan, Marković, Marija, Ivošević, Branislav, Kolonja, Božo M., "Kvalitet zeolita iz ležišta Vranjska banja po klasama krupnoće" in Hemijska industrija, 67, no. 4 (2013):663-669,
https://doi.org/10.2298/HEMIND120724107S .,
conv_300 .

TY  - JOUR
AU  - Mihajlović, Slavica
AU  - Vučinić, Dušica
AU  - Sekulić, Živko
AU  - Milićević, Sonja
AU  - Kolonja, Božo M.
PY  - 2013
UR  - https://ritnms.itnms.ac.rs/handle/123456789/257
AB  - This paper presents the interpretation of binding mechanism of stearic acid for calcite surface in two modification methods. In the "dry" method, a surface dissociation of stearic acid is assumed where H+ ion goes to a surface carbonate ion and stearic ion is chemisorbed on primary surface center of -Ca+ ion which is only available for chemisorption. The structure of adsorbed layer indicates chemisorption of stearate, but due to steric effects, and the oblique or gauche conformation of hydrocarbon chains. A part of surface -Ca+ centers can be blocked, which is explained by the result that physical adsorption dominates over 1.5%. In the "wet" method, by adding stearic acid, at concentration above the critical concentration of micelle formation in base solution, micelles are formed, and on the other side free stearic acid molecules or molecules from developed micelle dissociate. The resulting stearic ions can be chemisorbed on primary centers of -Ca+ ions or participate in ion exchange with OH- ions from secondary surface centers. With increasing adsorption density, the adsorbed ions and molecules, due to interactions of hydrocarbon chains, and thickness of double electrical layer, achieve a vertical orientation and keep the trans-conformation of hydrocarbon chains.
PB  - Elsevier, Amsterdam
T2  - Powder Technology
T1  - Mechanism of stearic acid adsorption to calcite
EP  - 216
SP  - 208
VL  - 245
DO  - 10.1016/j.powtec.2013.04.041
UR  - conv_661
ER  - 

@article{
author = "Mihajlović, Slavica and Vučinić, Dušica and Sekulić, Živko and Milićević, Sonja and Kolonja, Božo M.",
year = "2013",
abstract = "This paper presents the interpretation of binding mechanism of stearic acid for calcite surface in two modification methods. In the "dry" method, a surface dissociation of stearic acid is assumed where H+ ion goes to a surface carbonate ion and stearic ion is chemisorbed on primary surface center of -Ca+ ion which is only available for chemisorption. The structure of adsorbed layer indicates chemisorption of stearate, but due to steric effects, and the oblique or gauche conformation of hydrocarbon chains. A part of surface -Ca+ centers can be blocked, which is explained by the result that physical adsorption dominates over 1.5%. In the "wet" method, by adding stearic acid, at concentration above the critical concentration of micelle formation in base solution, micelles are formed, and on the other side free stearic acid molecules or molecules from developed micelle dissociate. The resulting stearic ions can be chemisorbed on primary centers of -Ca+ ions or participate in ion exchange with OH- ions from secondary surface centers. With increasing adsorption density, the adsorbed ions and molecules, due to interactions of hydrocarbon chains, and thickness of double electrical layer, achieve a vertical orientation and keep the trans-conformation of hydrocarbon chains.",
publisher = "Elsevier, Amsterdam",
journal = "Powder Technology",
title = "Mechanism of stearic acid adsorption to calcite",
pages = "216-208",
volume = "245",
doi = "10.1016/j.powtec.2013.04.041",
url = "conv_661"
}

Mihajlović, S., Vučinić, D., Sekulić, Ž., Milićević, S.,& Kolonja, B. M.. (2013). Mechanism of stearic acid adsorption to calcite. in Powder Technology
Elsevier, Amsterdam., 245, 208-216.
https://doi.org/10.1016/j.powtec.2013.04.041
conv_661

Mihajlović S, Vučinić D, Sekulić Ž, Milićević S, Kolonja BM. Mechanism of stearic acid adsorption to calcite. in Powder Technology. 2013;245:208-216.
doi:10.1016/j.powtec.2013.04.041
conv_661 .

Mihajlović, Slavica, Vučinić, Dušica, Sekulić, Živko, Milićević, Sonja, Kolonja, Božo M., "Mechanism of stearic acid adsorption to calcite" in Powder Technology, 245 (2013):208-216,
https://doi.org/10.1016/j.powtec.2013.04.041 .,
conv_661 .

TY  - JOUR
AU  - Mihajlović, Slavica
AU  - Sekulić, Živko
AU  - Vučinić, Dušica
AU  - Jovanović, Vladimir
AU  - Kolonja, Božo M.
PY  - 2012
UR  - https://ritnms.itnms.ac.rs/handle/123456789/227
AB  - U radu su prikazani rezultati ispitivanja mehaničkih osobina (zatezna čvrstoća, zatezno izduženje, prekidna čvrstoća i prekidno izduženje) na PVC mešavinama koje sadrže PVC (polivinil-hlorid), stabilizator, klizno sredstvo i punilac. Kao punilac korišćen je nemodifikovani kalcit i uzorci kalcita modifikovani stearinskom kiselinom suvim i mokrim postupkom. Rezultati ispitivanja su pokazali da PVC mešavina, koja sadrži kalcit modifikovan mokrim postupkom ima bolje mehaničke osobine od one mešavine koja sadrži kalcit modifikovan suvim postupkom. Tako je čvrstoća pri zatezanju PVC mešavine koja sadrži kalcit modifikovan sa 1,5% stearinske kiseline mokrim postupkom za 2,84% veća u odnosu na čvrstoću pri zatezanju PVC mešavine, koja sadrži kalcit modifikovan sa istim sadržajem stearinske kiseline, ali suvim postupkom.
AB  - In this study, mechanical properties of PVC mixtures (PVC, stabilizer, lubricant and filler) such as tensile strength, tensile elongation, breaking strength and breaking elongation were investigated. Unmodified calcite, as well as calcite modified by stearic acid, were used as fillers in wet and dry processes. The PVC mixtures containing the calcite modified by wet procedure had better mechanical properties compared to those with the calcite modified by the dry process. Tensile and breaking strength of the PVC mixture containing the calcite modified with 1.5% stearic acid using the wet process were higher for 2.8 and 5.2%, respectively, compared to the PVC mixture containing the calcite modified with the same amount of acid used in the dry process. The tensile strength difference between the mixtures increased with the increase of the concentration of used stearic acid up to 3%. The strength of PVC mixture with the calcite modified by the wet process was 3.1% higher compared to the mixture containing calcite modified by dry process. The results showed that the bonding strength between calcite and the adsorbed organic component affected tensile strength, tensile elongation and breaking strength of the PVC mixtures. The best filler was obtained by wet modification using 1.5% stearic acid solution that provided the formation of a stearate monolayer chemisorbed on calcite. The PVC mixtures containing the calcite modified by wet process using 1.5% stearic acid solution exhibited the best mechanical properties. This calcite was completely hydrophobic with dominant chemically adsorbed surfactant, which means that stearate chemisorbed on calcite provided stronger interaction in the calcite-stearic acid-PVC system.
PB  - Savez hemijskih inženjera, Beograd
T2  - Hemijska industrija
T1  - Ispitivanje mehaničkih osobina polivinil-hlorida sa dodatkom modifikovanog kalcita kao punioca
T1  - Mechanical properties of polyvinyl chloride mixtures with the addition of modified calcite as filler
EP  - 794
IS  - 5
SP  - 787
VL  - 66
DO  - 10.2298/HEMIND111115025M
UR  - conv_298
ER  - 

@article{
author = "Mihajlović, Slavica and Sekulić, Živko and Vučinić, Dušica and Jovanović, Vladimir and Kolonja, Božo M.",
year = "2012",
abstract = "U radu su prikazani rezultati ispitivanja mehaničkih osobina (zatezna čvrstoća, zatezno izduženje, prekidna čvrstoća i prekidno izduženje) na PVC mešavinama koje sadrže PVC (polivinil-hlorid), stabilizator, klizno sredstvo i punilac. Kao punilac korišćen je nemodifikovani kalcit i uzorci kalcita modifikovani stearinskom kiselinom suvim i mokrim postupkom. Rezultati ispitivanja su pokazali da PVC mešavina, koja sadrži kalcit modifikovan mokrim postupkom ima bolje mehaničke osobine od one mešavine koja sadrži kalcit modifikovan suvim postupkom. Tako je čvrstoća pri zatezanju PVC mešavine koja sadrži kalcit modifikovan sa 1,5% stearinske kiseline mokrim postupkom za 2,84% veća u odnosu na čvrstoću pri zatezanju PVC mešavine, koja sadrži kalcit modifikovan sa istim sadržajem stearinske kiseline, ali suvim postupkom., In this study, mechanical properties of PVC mixtures (PVC, stabilizer, lubricant and filler) such as tensile strength, tensile elongation, breaking strength and breaking elongation were investigated. Unmodified calcite, as well as calcite modified by stearic acid, were used as fillers in wet and dry processes. The PVC mixtures containing the calcite modified by wet procedure had better mechanical properties compared to those with the calcite modified by the dry process. Tensile and breaking strength of the PVC mixture containing the calcite modified with 1.5% stearic acid using the wet process were higher for 2.8 and 5.2%, respectively, compared to the PVC mixture containing the calcite modified with the same amount of acid used in the dry process. The tensile strength difference between the mixtures increased with the increase of the concentration of used stearic acid up to 3%. The strength of PVC mixture with the calcite modified by the wet process was 3.1% higher compared to the mixture containing calcite modified by dry process. The results showed that the bonding strength between calcite and the adsorbed organic component affected tensile strength, tensile elongation and breaking strength of the PVC mixtures. The best filler was obtained by wet modification using 1.5% stearic acid solution that provided the formation of a stearate monolayer chemisorbed on calcite. The PVC mixtures containing the calcite modified by wet process using 1.5% stearic acid solution exhibited the best mechanical properties. This calcite was completely hydrophobic with dominant chemically adsorbed surfactant, which means that stearate chemisorbed on calcite provided stronger interaction in the calcite-stearic acid-PVC system.",
publisher = "Savez hemijskih inženjera, Beograd",
journal = "Hemijska industrija",
title = "Ispitivanje mehaničkih osobina polivinil-hlorida sa dodatkom modifikovanog kalcita kao punioca, Mechanical properties of polyvinyl chloride mixtures with the addition of modified calcite as filler",
pages = "794-787",
number = "5",
volume = "66",
doi = "10.2298/HEMIND111115025M",
url = "conv_298"
}

Mihajlović, S., Sekulić, Ž., Vučinić, D., Jovanović, V.,& Kolonja, B. M.. (2012). Ispitivanje mehaničkih osobina polivinil-hlorida sa dodatkom modifikovanog kalcita kao punioca. in Hemijska industrija
Savez hemijskih inženjera, Beograd., 66(5), 787-794.
https://doi.org/10.2298/HEMIND111115025M
conv_298

Mihajlović S, Sekulić Ž, Vučinić D, Jovanović V, Kolonja BM. Ispitivanje mehaničkih osobina polivinil-hlorida sa dodatkom modifikovanog kalcita kao punioca. in Hemijska industrija. 2012;66(5):787-794.
doi:10.2298/HEMIND111115025M
conv_298 .

Mihajlović, Slavica, Sekulić, Živko, Vučinić, Dušica, Jovanović, Vladimir, Kolonja, Božo M., "Ispitivanje mehaničkih osobina polivinil-hlorida sa dodatkom modifikovanog kalcita kao punioca" in Hemijska industrija, 66, no. 5 (2012):787-794,
https://doi.org/10.2298/HEMIND111115025M .,
conv_298 .