Influence of a Low Content of PEO Segment on the Thermal, Surface and Morphological Properties of Triblock and Diblock PCL Copolymers
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2016
Authors
Ponjavić, MarijanaNikolić, Marija S.
Jevtic, Sanja
Rogan, Jelena R.
Stevanović, Sanja
Đonlagić, Jasna
Article (Published version)
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Two series, one of triblock (PCL/PEO/PCL) and the other of diblock (PCL/PEO) copolymers were prepared by ring-opening polymerization of epsilon-caprolactone catalized with tin(II) octoate and by using dihydroxy or monohydroxy poly(ethylene oxide) as the macroinitiator. The PEO block length was fixed (M-n 1,000 g/mol) and the PCL block lengths (M-n 10,000-40,000 g/mol) were tailored by changing weight ratio of epsilon-CL/PEO. The copolymers' structure was confirmed by H-1 and quantitative C-13 NMR spectroscopy while their molecular weights were determined by GPC analysis. The thermal properties and the degree of crystallinity of the copolymers were investigated and compared by using DSC and WAXS. Both types of copolymers were semicrystalline with the orthorhombic PCL crystal lattice. The surface morphology of the copolymer films was investigated by using optical microscopy and AFM analysis, which confirmed the spherulitic lamellar structure with spherulites of different diameters. Data ...indicated that a low content of PEO segment had an influence on thermal degradation behavior, crystallinity and morphology of copolymers. Roughness of copolymer films was affected by the content of PEO and correlated with the spherulites' diameter. The small changes in water and moisture absorption properties of copolymers compared to homopolymer PCL were observed.
Keywords:
triblock copolymer / diblock copolymer / PCL/PEO/PCL / PEO/PCL / AFM analysisSource:
Macromolecular Research, 2016, 24, 4, 323-335Publisher:
- Springer, Dordrecht
Funding / projects:
- Synthesis and characterization of novel functional polymers and polymeric nanocomposites (RS-MESTD-Basic Research (BR or ON)-172062)
DOI: 10.1007/s13233-016-4048-y
ISSN: 1598-5032
WoS: 000374902700005
Scopus: 2-s2.0-84964433291
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IHTMTY - JOUR AU - Ponjavić, Marijana AU - Nikolić, Marija S. AU - Jevtic, Sanja AU - Rogan, Jelena R. AU - Stevanović, Sanja AU - Đonlagić, Jasna PY - 2016 UR - https://cer.ihtm.bg.ac.rs/handle/123456789/2003 AB - Two series, one of triblock (PCL/PEO/PCL) and the other of diblock (PCL/PEO) copolymers were prepared by ring-opening polymerization of epsilon-caprolactone catalized with tin(II) octoate and by using dihydroxy or monohydroxy poly(ethylene oxide) as the macroinitiator. The PEO block length was fixed (M-n 1,000 g/mol) and the PCL block lengths (M-n 10,000-40,000 g/mol) were tailored by changing weight ratio of epsilon-CL/PEO. The copolymers' structure was confirmed by H-1 and quantitative C-13 NMR spectroscopy while their molecular weights were determined by GPC analysis. The thermal properties and the degree of crystallinity of the copolymers were investigated and compared by using DSC and WAXS. Both types of copolymers were semicrystalline with the orthorhombic PCL crystal lattice. The surface morphology of the copolymer films was investigated by using optical microscopy and AFM analysis, which confirmed the spherulitic lamellar structure with spherulites of different diameters. Data indicated that a low content of PEO segment had an influence on thermal degradation behavior, crystallinity and morphology of copolymers. Roughness of copolymer films was affected by the content of PEO and correlated with the spherulites' diameter. The small changes in water and moisture absorption properties of copolymers compared to homopolymer PCL were observed. PB - Springer, Dordrecht T2 - Macromolecular Research T1 - Influence of a Low Content of PEO Segment on the Thermal, Surface and Morphological Properties of Triblock and Diblock PCL Copolymers VL - 24 IS - 4 SP - 323 EP - 335 DO - 10.1007/s13233-016-4048-y ER -
@article{ author = "Ponjavić, Marijana and Nikolić, Marija S. and Jevtic, Sanja and Rogan, Jelena R. and Stevanović, Sanja and Đonlagić, Jasna", year = "2016", abstract = "Two series, one of triblock (PCL/PEO/PCL) and the other of diblock (PCL/PEO) copolymers were prepared by ring-opening polymerization of epsilon-caprolactone catalized with tin(II) octoate and by using dihydroxy or monohydroxy poly(ethylene oxide) as the macroinitiator. The PEO block length was fixed (M-n 1,000 g/mol) and the PCL block lengths (M-n 10,000-40,000 g/mol) were tailored by changing weight ratio of epsilon-CL/PEO. The copolymers' structure was confirmed by H-1 and quantitative C-13 NMR spectroscopy while their molecular weights were determined by GPC analysis. The thermal properties and the degree of crystallinity of the copolymers were investigated and compared by using DSC and WAXS. Both types of copolymers were semicrystalline with the orthorhombic PCL crystal lattice. The surface morphology of the copolymer films was investigated by using optical microscopy and AFM analysis, which confirmed the spherulitic lamellar structure with spherulites of different diameters. Data indicated that a low content of PEO segment had an influence on thermal degradation behavior, crystallinity and morphology of copolymers. Roughness of copolymer films was affected by the content of PEO and correlated with the spherulites' diameter. The small changes in water and moisture absorption properties of copolymers compared to homopolymer PCL were observed.", publisher = "Springer, Dordrecht", journal = "Macromolecular Research", title = "Influence of a Low Content of PEO Segment on the Thermal, Surface and Morphological Properties of Triblock and Diblock PCL Copolymers", volume = "24", number = "4", pages = "323-335", doi = "10.1007/s13233-016-4048-y" }
Ponjavić, M., Nikolić, M. S., Jevtic, S., Rogan, J. R., Stevanović, S.,& Đonlagić, J.. (2016). Influence of a Low Content of PEO Segment on the Thermal, Surface and Morphological Properties of Triblock and Diblock PCL Copolymers. in Macromolecular Research Springer, Dordrecht., 24(4), 323-335. https://doi.org/10.1007/s13233-016-4048-y
Ponjavić M, Nikolić MS, Jevtic S, Rogan JR, Stevanović S, Đonlagić J. Influence of a Low Content of PEO Segment on the Thermal, Surface and Morphological Properties of Triblock and Diblock PCL Copolymers. in Macromolecular Research. 2016;24(4):323-335. doi:10.1007/s13233-016-4048-y .
Ponjavić, Marijana, Nikolić, Marija S., Jevtic, Sanja, Rogan, Jelena R., Stevanović, Sanja, Đonlagić, Jasna, "Influence of a Low Content of PEO Segment on the Thermal, Surface and Morphological Properties of Triblock and Diblock PCL Copolymers" in Macromolecular Research, 24, no. 4 (2016):323-335, https://doi.org/10.1007/s13233-016-4048-y . .