Influence of Short Central PEO Segment on Hydrolytic and Enzymatic Degradation of Triblock PCL Copolymers
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Ponjavić, MarijanaNikolić, Marija S.
Jeremić, Sanja
Đokić, Lidija
Nikodinović-Runić, Jasmina
Cosović, Vladan R.
Đonlagić, Jasna
Article (Published version)
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Hydrolytic, enzymatic degradation and composting under controlled conditions of series of triblock PCL/PEO copolymers, PCEC, with central short PEO block (M (n) 400 g/mol) are presented and compared with homopolymer (PCL). The PCEC copolymers, synthesized via ring-opening polymerization of epsilon-caprolactone, were characterized by H-1 NMR, quantitative C-13 NMR, GPC, DSC and WAXS. The introduction of the PEO central segment ( lt 2 wt%) in PCL chains significantly affected thermal degradation and crystallization behavior, while the hydrophobicity was slightly reduced as confirmed by water absorption and moisture uptake experiments. Hydrolytic degradation studies in phosphate buffer after 8 weeks indicated a small weight loss, while FTIR analysis detected changes in crystallinity indexes and GPC measurements revealed bulk degradation. Enzymatic degradation tested by cell-free extracts containing Pseudomonas aeruginosa PAO1 confirmed high enzyme activity throughout the surface causing ...morphological changes detected by optical microscopy and AFM analysis. The changes in roughness of polymer films revealed surface erosion mechanism of enzymatic degradation. Copolymer with the highest content of PEO segment and the lowest molecular weight showed better degradation ability compared to PCL and other copolymers. Furthermore, composting of polymer films in a model compost system at 37 A degrees C resulted in significant degradation of the all synthesized block copolymers.
Keywords:
Triblock copolymers / PCL / Hydrolytic degradation / Enzymatic degradation / Composting / AFM analysisSource:
Journal of Polymers and the Environment, 2018, 26, 6, 2346-2359Publisher:
- Springer/Plenum Publishers, New York
Funding / projects:
- Synthesis and characterization of novel functional polymers and polymeric nanocomposites (RS-MESTD-Basic Research (BR or ON)-172062)
- Microbial diversity study and characterization of beneficial environmental microorganisms (RS-MESTD-Basic Research (BR or ON)-173048)
DOI: 10.1007/s10924-017-1130-2
ISSN: 1566-2543
WoS: 000432803400014
Scopus: 2-s2.0-85032654211
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Institut za molekularnu genetiku i genetičko inženjerstvoTY - JOUR AU - Ponjavić, Marijana AU - Nikolić, Marija S. AU - Jeremić, Sanja AU - Đokić, Lidija AU - Nikodinović-Runić, Jasmina AU - Cosović, Vladan R. AU - Đonlagić, Jasna PY - 2018 UR - https://imagine.imgge.bg.ac.rs/handle/123456789/1125 AB - Hydrolytic, enzymatic degradation and composting under controlled conditions of series of triblock PCL/PEO copolymers, PCEC, with central short PEO block (M (n) 400 g/mol) are presented and compared with homopolymer (PCL). The PCEC copolymers, synthesized via ring-opening polymerization of epsilon-caprolactone, were characterized by H-1 NMR, quantitative C-13 NMR, GPC, DSC and WAXS. The introduction of the PEO central segment ( lt 2 wt%) in PCL chains significantly affected thermal degradation and crystallization behavior, while the hydrophobicity was slightly reduced as confirmed by water absorption and moisture uptake experiments. Hydrolytic degradation studies in phosphate buffer after 8 weeks indicated a small weight loss, while FTIR analysis detected changes in crystallinity indexes and GPC measurements revealed bulk degradation. Enzymatic degradation tested by cell-free extracts containing Pseudomonas aeruginosa PAO1 confirmed high enzyme activity throughout the surface causing morphological changes detected by optical microscopy and AFM analysis. The changes in roughness of polymer films revealed surface erosion mechanism of enzymatic degradation. Copolymer with the highest content of PEO segment and the lowest molecular weight showed better degradation ability compared to PCL and other copolymers. Furthermore, composting of polymer films in a model compost system at 37 A degrees C resulted in significant degradation of the all synthesized block copolymers. PB - Springer/Plenum Publishers, New York T2 - Journal of Polymers and the Environment T1 - Influence of Short Central PEO Segment on Hydrolytic and Enzymatic Degradation of Triblock PCL Copolymers EP - 2359 IS - 6 SP - 2346 VL - 26 DO - 10.1007/s10924-017-1130-2 ER -
@article{ author = "Ponjavić, Marijana and Nikolić, Marija S. and Jeremić, Sanja and Đokić, Lidija and Nikodinović-Runić, Jasmina and Cosović, Vladan R. and Đonlagić, Jasna", year = "2018", abstract = "Hydrolytic, enzymatic degradation and composting under controlled conditions of series of triblock PCL/PEO copolymers, PCEC, with central short PEO block (M (n) 400 g/mol) are presented and compared with homopolymer (PCL). The PCEC copolymers, synthesized via ring-opening polymerization of epsilon-caprolactone, were characterized by H-1 NMR, quantitative C-13 NMR, GPC, DSC and WAXS. The introduction of the PEO central segment ( lt 2 wt%) in PCL chains significantly affected thermal degradation and crystallization behavior, while the hydrophobicity was slightly reduced as confirmed by water absorption and moisture uptake experiments. Hydrolytic degradation studies in phosphate buffer after 8 weeks indicated a small weight loss, while FTIR analysis detected changes in crystallinity indexes and GPC measurements revealed bulk degradation. Enzymatic degradation tested by cell-free extracts containing Pseudomonas aeruginosa PAO1 confirmed high enzyme activity throughout the surface causing morphological changes detected by optical microscopy and AFM analysis. The changes in roughness of polymer films revealed surface erosion mechanism of enzymatic degradation. Copolymer with the highest content of PEO segment and the lowest molecular weight showed better degradation ability compared to PCL and other copolymers. Furthermore, composting of polymer films in a model compost system at 37 A degrees C resulted in significant degradation of the all synthesized block copolymers.", publisher = "Springer/Plenum Publishers, New York", journal = "Journal of Polymers and the Environment", title = "Influence of Short Central PEO Segment on Hydrolytic and Enzymatic Degradation of Triblock PCL Copolymers", pages = "2359-2346", number = "6", volume = "26", doi = "10.1007/s10924-017-1130-2" }
Ponjavić, M., Nikolić, M. S., Jeremić, S., Đokić, L., Nikodinović-Runić, J., Cosović, V. R.,& Đonlagić, J.. (2018). Influence of Short Central PEO Segment on Hydrolytic and Enzymatic Degradation of Triblock PCL Copolymers. in Journal of Polymers and the Environment Springer/Plenum Publishers, New York., 26(6), 2346-2359. https://doi.org/10.1007/s10924-017-1130-2
Ponjavić M, Nikolić MS, Jeremić S, Đokić L, Nikodinović-Runić J, Cosović VR, Đonlagić J. Influence of Short Central PEO Segment on Hydrolytic and Enzymatic Degradation of Triblock PCL Copolymers. in Journal of Polymers and the Environment. 2018;26(6):2346-2359. doi:10.1007/s10924-017-1130-2 .
Ponjavić, Marijana, Nikolić, Marija S., Jeremić, Sanja, Đokić, Lidija, Nikodinović-Runić, Jasmina, Cosović, Vladan R., Đonlagić, Jasna, "Influence of Short Central PEO Segment on Hydrolytic and Enzymatic Degradation of Triblock PCL Copolymers" in Journal of Polymers and the Environment, 26, no. 6 (2018):2346-2359, https://doi.org/10.1007/s10924-017-1130-2 . .