TY  - JOUR
AU  - Stefanović, Ivan
AU  - Spirkova, Milena
AU  - Ostojić, Sanja
AU  - Stefanov, Plamen
AU  - Pavlović, Vladimir B.
AU  - Pergal, Marija
PY  - 2017
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2092
AB  - The aim of this work was to prepare and characterize the series of segmented polyurethane nanocomposites (PUNC) modified with poly(dimethylsiloxane) and based on montmorillonite (Mt) as a nano-filler. alpha,omega-Dihydroxy-poly(propylene oxide)-b-poly(dimethylsiloxane)-b-poly(propylene oxide) macrodiol was used as the soft segment component, while 4,4'-diphenylmethane diisocyanate (MDI) and 1,4-butanediol (BD) were selected as the hard segment components. PUNC were synthesized with different ratio of hard/soft segments. PUNC were morphologically, structurally, thermally, mechanically and surface characterized by XRD, TEM, FTIR, AFM, TGA, DMTA, tensile test, XPS, contact angle, surface free energy (SFE) and water absorption measurements. Added Mt (1 wt%) was completely delaminated and well dispersed in the form of mixed exfoliated/intercalated layers in the polymer matrix, and that PUNC have more pronounced microphase separated morphology, higher thermal stability, superior mechanical features, enhanced surface properties, as well as outstanding hydrophobicity. Due to the improved features, developed polymers can be considered as candidates for materials with specific biomedical applications or as waterproof coatings.
PB  - Elsevier
T2  - Applied Clay Science
T1  - Montmorillonite/poly(urethane-siloxane) nanocomposites: Morphological, thermal, mechanical and surface properties
VL  - 149
SP  - 136
EP  - 146
DO  - 10.1016/j.clay.2017.08.021
ER  - 

@article{
author = "Stefanović, Ivan and Spirkova, Milena and Ostojić, Sanja and Stefanov, Plamen and Pavlović, Vladimir B. and Pergal, Marija",
year = "2017",
abstract = "The aim of this work was to prepare and characterize the series of segmented polyurethane nanocomposites (PUNC) modified with poly(dimethylsiloxane) and based on montmorillonite (Mt) as a nano-filler. alpha,omega-Dihydroxy-poly(propylene oxide)-b-poly(dimethylsiloxane)-b-poly(propylene oxide) macrodiol was used as the soft segment component, while 4,4'-diphenylmethane diisocyanate (MDI) and 1,4-butanediol (BD) were selected as the hard segment components. PUNC were synthesized with different ratio of hard/soft segments. PUNC were morphologically, structurally, thermally, mechanically and surface characterized by XRD, TEM, FTIR, AFM, TGA, DMTA, tensile test, XPS, contact angle, surface free energy (SFE) and water absorption measurements. Added Mt (1 wt%) was completely delaminated and well dispersed in the form of mixed exfoliated/intercalated layers in the polymer matrix, and that PUNC have more pronounced microphase separated morphology, higher thermal stability, superior mechanical features, enhanced surface properties, as well as outstanding hydrophobicity. Due to the improved features, developed polymers can be considered as candidates for materials with specific biomedical applications or as waterproof coatings.",
publisher = "Elsevier",
journal = "Applied Clay Science",
title = "Montmorillonite/poly(urethane-siloxane) nanocomposites: Morphological, thermal, mechanical and surface properties",
volume = "149",
pages = "136-146",
doi = "10.1016/j.clay.2017.08.021"
}

Stefanović, I., Spirkova, M., Ostojić, S., Stefanov, P., Pavlović, V. B.,& Pergal, M.. (2017). Montmorillonite/poly(urethane-siloxane) nanocomposites: Morphological, thermal, mechanical and surface properties. in Applied Clay Science
Elsevier., 149, 136-146.
https://doi.org/10.1016/j.clay.2017.08.021

Stefanović I, Spirkova M, Ostojić S, Stefanov P, Pavlović VB, Pergal M. Montmorillonite/poly(urethane-siloxane) nanocomposites: Morphological, thermal, mechanical and surface properties. in Applied Clay Science. 2017;149:136-146.
doi:10.1016/j.clay.2017.08.021 .

Stefanović, Ivan, Spirkova, Milena, Ostojić, Sanja, Stefanov, Plamen, Pavlović, Vladimir B., Pergal, Marija, "Montmorillonite/poly(urethane-siloxane) nanocomposites: Morphological, thermal, mechanical and surface properties" in Applied Clay Science, 149 (2017):136-146,
https://doi.org/10.1016/j.clay.2017.08.021 . .

TY  - JOUR
AU  - Pergal, Marija
AU  - Stefanović, Ivan
AU  - Poreba, Rafal
AU  - Steinhart, Milos
AU  - Jovancic, Petar
AU  - Ostojić, Sanja
AU  - Spirkova, Milena
PY  - 2017
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2260
AB  - Novel poly(dimethylsiloxane)-based polyurethane nanocomposites (TPU-NCs) were synthesized using in situ polymerization with the nanoclay Cloisite 30B. Differential scanning calorimetry, thermogravimetric analysis, and dynamic mechanical thermal analysis showed that TPU-NCs with an organoclay content of  LT = 5 wt % exhibited increased thermal stability, storage modulus, and hard-segment melt temperatures but decreased degrees of crystallinity. TPU-NCs displayed increased surface hydrophilicity and enhanced surface free energy with increasing organoclay content. Small and wide-angle X-ray scattering confirmed intercalated formations of organoclays in the nanocomposites. Individual clay particles on the surfaces of TPUs with lower organoclay loadings (1 or 3 wt %) or organoclay agglomerates in TPUs with higher amounts of organoclay (>= 5 wt %) were detectable using scanning electron microscopy. The relatively smooth and homogeneous character of pure TPU and the distinctly heterogeneous and rough surfaces of TPU-NCs were detected via atomic force microscopy. Among the nanomaterials prepared, TPU-NCs with 1 wt % organoclay provided the best balance between the organoclay concentration and the functional properties desired in biomedical applications.
PB  - American Chemical Society (ACS)
T2  - Industrial and Engineering Chemistry Research
T1  - Influence of the Organoclay Content on the Structure, Morphology, and Surface Related Properties of Novel Poly(dimethylsiloxane)-Based Polyurethane/Organoclay Nanocomposites
VL  - 56
IS  - 17
SP  - 4970
EP  - 4983
DO  - 10.1021/acs.iecr.6b04913
ER  - 

@article{
author = "Pergal, Marija and Stefanović, Ivan and Poreba, Rafal and Steinhart, Milos and Jovancic, Petar and Ostojić, Sanja and Spirkova, Milena",
year = "2017",
abstract = "Novel poly(dimethylsiloxane)-based polyurethane nanocomposites (TPU-NCs) were synthesized using in situ polymerization with the nanoclay Cloisite 30B. Differential scanning calorimetry, thermogravimetric analysis, and dynamic mechanical thermal analysis showed that TPU-NCs with an organoclay content of  LT = 5 wt % exhibited increased thermal stability, storage modulus, and hard-segment melt temperatures but decreased degrees of crystallinity. TPU-NCs displayed increased surface hydrophilicity and enhanced surface free energy with increasing organoclay content. Small and wide-angle X-ray scattering confirmed intercalated formations of organoclays in the nanocomposites. Individual clay particles on the surfaces of TPUs with lower organoclay loadings (1 or 3 wt %) or organoclay agglomerates in TPUs with higher amounts of organoclay (>= 5 wt %) were detectable using scanning electron microscopy. The relatively smooth and homogeneous character of pure TPU and the distinctly heterogeneous and rough surfaces of TPU-NCs were detected via atomic force microscopy. Among the nanomaterials prepared, TPU-NCs with 1 wt % organoclay provided the best balance between the organoclay concentration and the functional properties desired in biomedical applications.",
publisher = "American Chemical Society (ACS)",
journal = "Industrial and Engineering Chemistry Research",
title = "Influence of the Organoclay Content on the Structure, Morphology, and Surface Related Properties of Novel Poly(dimethylsiloxane)-Based Polyurethane/Organoclay Nanocomposites",
volume = "56",
number = "17",
pages = "4970-4983",
doi = "10.1021/acs.iecr.6b04913"
}

Pergal, M., Stefanović, I., Poreba, R., Steinhart, M., Jovancic, P., Ostojić, S.,& Spirkova, M.. (2017). Influence of the Organoclay Content on the Structure, Morphology, and Surface Related Properties of Novel Poly(dimethylsiloxane)-Based Polyurethane/Organoclay Nanocomposites. in Industrial and Engineering Chemistry Research
American Chemical Society (ACS)., 56(17), 4970-4983.
https://doi.org/10.1021/acs.iecr.6b04913

Pergal M, Stefanović I, Poreba R, Steinhart M, Jovancic P, Ostojić S, Spirkova M. Influence of the Organoclay Content on the Structure, Morphology, and Surface Related Properties of Novel Poly(dimethylsiloxane)-Based Polyurethane/Organoclay Nanocomposites. in Industrial and Engineering Chemistry Research. 2017;56(17):4970-4983.
doi:10.1021/acs.iecr.6b04913 .

Pergal, Marija, Stefanović, Ivan, Poreba, Rafal, Steinhart, Milos, Jovancic, Petar, Ostojić, Sanja, Spirkova, Milena, "Influence of the Organoclay Content on the Structure, Morphology, and Surface Related Properties of Novel Poly(dimethylsiloxane)-Based Polyurethane/Organoclay Nanocomposites" in Industrial and Engineering Chemistry Research, 56, no. 17 (2017):4970-4983,
https://doi.org/10.1021/acs.iecr.6b04913 . .

TY  - JOUR
AU  - Pergal, Marija
AU  - Stefanović, Ivan
AU  - Poreba, Rafal
AU  - Steinhart, Milos
AU  - Jovancic, Petar
AU  - Ostojić, Sanja
AU  - Spirkova, Milena
PY  - 2017
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3003
AB  - Novel poly(dimethylsiloxane)-based polyurethane nanocomposites (TPU-NCs) were synthesized using in situ polymerization with the nanoclay Cloisite 30B. Differential scanning calorimetry, thermogravimetric analysis, and dynamic mechanical thermal analysis showed that TPU-NCs with an organoclay content of  LT = 5 wt % exhibited increased thermal stability, storage modulus, and hard-segment melt temperatures but decreased degrees of crystallinity. TPU-NCs displayed increased surface hydrophilicity and enhanced surface free energy with increasing organoclay content. Small and wide-angle X-ray scattering confirmed intercalated formations of organoclays in the nanocomposites. Individual clay particles on the surfaces of TPUs with lower organoclay loadings (1 or 3 wt %) or organoclay agglomerates in TPUs with higher amounts of organoclay (>= 5 wt %) were detectable using scanning electron microscopy. The relatively smooth and homogeneous character of pure TPU and the distinctly heterogeneous and rough surfaces of TPU-NCs were detected via atomic force microscopy. Among the nanomaterials prepared, TPU-NCs with 1 wt % organoclay provided the best balance between the organoclay concentration and the functional properties desired in biomedical applications.
PB  - American Chemical Society (ACS)
T2  - Industrial and Engineering Chemistry Research
T1  - Influence of the Organoclay Content on the Structure, Morphology, and Surface Related Properties of Novel Poly(dimethylsiloxane)-Based Polyurethane/Organoclay Nanocomposites
VL  - 56
IS  - 17
SP  - 4970
EP  - 4983
DO  - 10.1021/acs.iecr.6b04913
ER  - 

@article{
author = "Pergal, Marija and Stefanović, Ivan and Poreba, Rafal and Steinhart, Milos and Jovancic, Petar and Ostojić, Sanja and Spirkova, Milena",
year = "2017",
abstract = "Novel poly(dimethylsiloxane)-based polyurethane nanocomposites (TPU-NCs) were synthesized using in situ polymerization with the nanoclay Cloisite 30B. Differential scanning calorimetry, thermogravimetric analysis, and dynamic mechanical thermal analysis showed that TPU-NCs with an organoclay content of  LT = 5 wt % exhibited increased thermal stability, storage modulus, and hard-segment melt temperatures but decreased degrees of crystallinity. TPU-NCs displayed increased surface hydrophilicity and enhanced surface free energy with increasing organoclay content. Small and wide-angle X-ray scattering confirmed intercalated formations of organoclays in the nanocomposites. Individual clay particles on the surfaces of TPUs with lower organoclay loadings (1 or 3 wt %) or organoclay agglomerates in TPUs with higher amounts of organoclay (>= 5 wt %) were detectable using scanning electron microscopy. The relatively smooth and homogeneous character of pure TPU and the distinctly heterogeneous and rough surfaces of TPU-NCs were detected via atomic force microscopy. Among the nanomaterials prepared, TPU-NCs with 1 wt % organoclay provided the best balance between the organoclay concentration and the functional properties desired in biomedical applications.",
publisher = "American Chemical Society (ACS)",
journal = "Industrial and Engineering Chemistry Research",
title = "Influence of the Organoclay Content on the Structure, Morphology, and Surface Related Properties of Novel Poly(dimethylsiloxane)-Based Polyurethane/Organoclay Nanocomposites",
volume = "56",
number = "17",
pages = "4970-4983",
doi = "10.1021/acs.iecr.6b04913"
}

Pergal, M., Stefanović, I., Poreba, R., Steinhart, M., Jovancic, P., Ostojić, S.,& Spirkova, M.. (2017). Influence of the Organoclay Content on the Structure, Morphology, and Surface Related Properties of Novel Poly(dimethylsiloxane)-Based Polyurethane/Organoclay Nanocomposites. in Industrial and Engineering Chemistry Research
American Chemical Society (ACS)., 56(17), 4970-4983.
https://doi.org/10.1021/acs.iecr.6b04913

Pergal M, Stefanović I, Poreba R, Steinhart M, Jovancic P, Ostojić S, Spirkova M. Influence of the Organoclay Content on the Structure, Morphology, and Surface Related Properties of Novel Poly(dimethylsiloxane)-Based Polyurethane/Organoclay Nanocomposites. in Industrial and Engineering Chemistry Research. 2017;56(17):4970-4983.
doi:10.1021/acs.iecr.6b04913 .

Pergal, Marija, Stefanović, Ivan, Poreba, Rafal, Steinhart, Milos, Jovancic, Petar, Ostojić, Sanja, Spirkova, Milena, "Influence of the Organoclay Content on the Structure, Morphology, and Surface Related Properties of Novel Poly(dimethylsiloxane)-Based Polyurethane/Organoclay Nanocomposites" in Industrial and Engineering Chemistry Research, 56, no. 17 (2017):4970-4983,
https://doi.org/10.1021/acs.iecr.6b04913 . .