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dc.creatorDžunuzović, Jasna
dc.creatorStefanović, Ivan
dc.creatorDžunuzović, Enis
dc.creatorDapčević, Aleksandra
dc.creatorŠešlija, Sanja
dc.creatorBalanč, Bojana
dc.creatorLamae, Giuseppe C.
dc.date.accessioned2021-03-10T13:58:19Z
dc.date.available2021-03-10T13:58:19Z
dc.date.issued2019
dc.identifier.issn0300-9440
dc.identifier.urihttp://TechnoRep.tmf.bg.ac.rs/handle/123456789/4118
dc.description.abstractA series of environmentally friendly polyurethane (PU) networks based on polycaprolactone as soft segment (SS) and Boltorn (R) 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 (R) aliphatic hyperbranched polyester can be designed for appropriate and desired application.en
dc.publisherElsevier Science Sa, Lausanne
dc.relationinfo:eu-repo/grantAgreement/MESTD/Basic Research (BR or ON)/172062/RS//
dc.relationinfo:eu-repo/grantAgreement/MESTD/Integrated and Interdisciplinary Research (IIR or III)/45007/RS//
dc.rightsrestrictedAccess
dc.sourceProgress in Organic Coatings
dc.subjectPolyurethane networksen
dc.subjectPolycaprolactoneen
dc.subjectHyperbranched polyestersen
dc.subjectThermal propertiesen
dc.subjectMechanical propertiesen
dc.subjectMorphologyen
dc.titlePolyurethane networks based on polycaprolactone and hyperbranched polyester: Structural, thermal and mechanical investigationen
dc.typearticle
dc.rights.licenseARR
dc.citation.other137: -
dc.citation.rankaM21
dc.citation.volume137
dc.identifier.doi10.1016/j.porgcoat.2019.105305
dc.identifier.rcubconv_6001
dc.identifier.scopus2-s2.0-85072222298
dc.identifier.wos000500944400030
dc.type.versionpublishedVersion


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