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Polyurethane networks based on polycaprolactone and hyperbranched polyester: Structural, thermal and mechanical investigation

Authorized Users Only
2019
Authors
Džunuzović, Jasna
Stefanović, Ivan
Džunuzović, Enis S.
Dapčević, Aleksandra
Šešlija, Sanja
Balanč, Bojana D.
Lamae, Giuseppe C.
Article (Published version)
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Abstract
A series of environmentally friendly polyurethane (PU) networks based on polycaprolactone as soft segment (SS) and Boltorn® aliphatic hyperbranched polyester of the second pseudo generation as crosslinking agent was prepared by a two-step polymerization in solution. The chemical structure of the PU networks was analyzed by Fourier transform infrared spectroscopy, while XRD analysis revealed that these samples are amorphous. Swelling measurements, water absorption study, dynamic mechanical analysis, differential scanning calorimetry, thermogravimetric analysis, mechanical tests and scanning electron microscope revealed that, swelling behavior, hydrophobicity, thermal and mechanical features and morphology of PU networks show clear dependence on polycaprolactone content. The increase of the SS content induced appearance of the microphase separated morphology, increase of thermal stability, elongation at break, hydrophobicity and swelling ability in tetrahydrofuran and toluene, but at the... same time it is responsible for the decrease of crosslinking density, glass transition temperatures, rigidity, tensile strength and Young’s modulus of PU networks. Scanning electron microscope images of the fracture surfaces of PU networks show that their surface is rough, irregular, with flake-like structure, where size of flakes increases with increasing SS content. These results indicate that by choosing adequate SS content, PU coatings with diverse features based on polycaprolactone and Boltorn® aliphatic hyperbranched polyester can be designed for appropriate and desired application

Keywords:
Morphology / Mechanical properties / Thermal properties / Hyperbranched polyesters / Polycaprolactone / Polyurethane networks
Source:
Progress in Organic Coatings, 2019, 137, 105305-
Publisher:
  • Elsevier
Funding / projects:
  • Synthesis and characterization of novel functional polymers and polymeric nanocomposites (RS-172062)
  • Zero- to Three-Dimensional Nanostructures for Application in Electronics and Renewable Energy Sources: Synthesis, Characterization and Processing (RS-45007)

DOI: 10.1016/j.porgcoat.2019.105305

ISSN: 03009440

WoS: 000500944400030

Scopus: 2-s2.0-85072222298
[ Google Scholar ]
14
6
URI
https://cer.ihtm.bg.ac.rs/handle/123456789/3220
Collections
  • Radovi istraživača / Researchers' publications
Institution/Community
IHTM
TY  - JOUR
AU  - Džunuzović, Jasna
AU  - Stefanović, Ivan
AU  - Džunuzović, Enis S.
AU  - Dapčević, Aleksandra
AU  - Šešlija, Sanja
AU  - Balanč, Bojana D.
AU  - Lamae, Giuseppe C.
PY  - 2019
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3220
AB  - A series of environmentally friendly polyurethane (PU) networks based on polycaprolactone as soft segment (SS) and Boltorn® aliphatic hyperbranched polyester of the second pseudo generation as crosslinking agent was prepared by a two-step polymerization in solution. The chemical structure of the PU networks was analyzed by Fourier transform infrared spectroscopy, while XRD analysis revealed that these samples are amorphous. Swelling measurements, water absorption study, dynamic mechanical analysis, differential scanning calorimetry, thermogravimetric analysis, mechanical tests and scanning electron microscope revealed that, swelling behavior, hydrophobicity, thermal and mechanical features and morphology of PU networks show clear dependence on polycaprolactone content. The increase of the SS content induced appearance of the microphase separated morphology, increase of thermal stability, elongation at break, hydrophobicity and swelling ability in tetrahydrofuran and toluene, but at the same time it is responsible for the decrease of crosslinking density, glass transition temperatures, rigidity, tensile strength and Young’s modulus of PU networks. Scanning electron microscope images of the fracture surfaces of PU networks show that their surface is rough, irregular, with flake-like structure, where size of flakes increases with increasing SS content. These results indicate that by choosing adequate SS content, PU coatings with diverse features based on polycaprolactone and Boltorn® aliphatic hyperbranched polyester can be designed for appropriate and desired application
PB  - Elsevier
T2  - Progress in Organic Coatings
T1  - Polyurethane networks based on polycaprolactone and hyperbranched polyester: Structural, thermal and mechanical investigation
IS  - 137
SP  - 105305
DO  - 10.1016/j.porgcoat.2019.105305
ER  - 
@article{
author = "Džunuzović, Jasna and Stefanović, Ivan and Džunuzović, Enis S. and Dapčević, Aleksandra and Šešlija, Sanja and Balanč, Bojana D. and Lamae, Giuseppe C.",
year = "2019",
abstract = "A series of environmentally friendly polyurethane (PU) networks based on polycaprolactone as soft segment (SS) and Boltorn® aliphatic hyperbranched polyester of the second pseudo generation as crosslinking agent was prepared by a two-step polymerization in solution. The chemical structure of the PU networks was analyzed by Fourier transform infrared spectroscopy, while XRD analysis revealed that these samples are amorphous. Swelling measurements, water absorption study, dynamic mechanical analysis, differential scanning calorimetry, thermogravimetric analysis, mechanical tests and scanning electron microscope revealed that, swelling behavior, hydrophobicity, thermal and mechanical features and morphology of PU networks show clear dependence on polycaprolactone content. The increase of the SS content induced appearance of the microphase separated morphology, increase of thermal stability, elongation at break, hydrophobicity and swelling ability in tetrahydrofuran and toluene, but at the same time it is responsible for the decrease of crosslinking density, glass transition temperatures, rigidity, tensile strength and Young’s modulus of PU networks. Scanning electron microscope images of the fracture surfaces of PU networks show that their surface is rough, irregular, with flake-like structure, where size of flakes increases with increasing SS content. These results indicate that by choosing adequate SS content, PU coatings with diverse features based on polycaprolactone and Boltorn® aliphatic hyperbranched polyester can be designed for appropriate and desired application",
publisher = "Elsevier",
journal = "Progress in Organic Coatings",
title = "Polyurethane networks based on polycaprolactone and hyperbranched polyester: Structural, thermal and mechanical investigation",
number = "137",
pages = "105305",
doi = "10.1016/j.porgcoat.2019.105305"
}
Džunuzović, J., Stefanović, I., Džunuzović, E. S., Dapčević, A., Šešlija, S., Balanč, B. D.,& Lamae, G. C.. (2019). Polyurethane networks based on polycaprolactone and hyperbranched polyester: Structural, thermal and mechanical investigation. in Progress in Organic Coatings
Elsevier.(137), 105305.
https://doi.org/10.1016/j.porgcoat.2019.105305
Džunuzović J, Stefanović I, Džunuzović ES, Dapčević A, Šešlija S, Balanč BD, Lamae GC. Polyurethane networks based on polycaprolactone and hyperbranched polyester: Structural, thermal and mechanical investigation. in Progress in Organic Coatings. 2019;(137):105305.
doi:10.1016/j.porgcoat.2019.105305 .
Džunuzović, Jasna, Stefanović, Ivan, Džunuzović, Enis S., Dapčević, Aleksandra, Šešlija, Sanja, Balanč, Bojana D., Lamae, Giuseppe C., "Polyurethane networks based on polycaprolactone and hyperbranched polyester: Structural, thermal and mechanical investigation" in Progress in Organic Coatings, no. 137 (2019):105305,
https://doi.org/10.1016/j.porgcoat.2019.105305 . .

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