Degradability of cross-linked polyurethanes based on synthetic polyhydroxybutyrate and modified with polylactide
Authors
Brzeska, JoannaMorawska, Magda
Sikorska, Wanda
Tercjak, Agnieszka
Kowalczuk, Marek
Rutkowska, Maria
Issue Date
2017-06-14
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In many areas of application of conventional non-degradable cross-linked polyurethanes (PUR), there is a need for their degradation under the influence of specific environmental factors. It is practiced by incorporation of sensitive to degradation compounds (usually of natural origin) into the polyurethane structure, or by mixing them with polyurethanes. Cross-linked polyurethanes (with 10 and 30%wt amount of synthetic poly([R,S]-3-hydroxybutyrate) (R,S-PHB) in soft segments) and their physical blends with poly([d,l]-lactide) (PDLLA) were investigated and then degraded under hydrolytic (phosphate buffer solution) and oxidative (CoCl2/H2O2) conditions. The rate of degradation was monitored by changes of samples mass, morphology of surface and their thermal properties. Despite the small weight losses of samples, the changes of thermal properties of polymers and topography of their surface indicated that they were susceptible to gradual degradation under oxidative and hydrolytic conditions. Blends of PDLLA and polyurethane with 30 wt% of R,S-PHB in soft segments and PUR/PDLLA blends absorbed more water and degraded faster than polyurethane with low amount of R,S-PHB.Citation
Brzeska, J., Morawska, M., Sikorska, W. Tercjak, A., Kowalczuk, M., Rutkowska, M. (2017) 'Degradability of cross-linked polyurethanes based on synthetic polyhydroxybutyrate and modified with polylactide' Chemical Papers, 71(11), pp. 2243-2251Publisher
SpringerJournal
Chemical PapersAdditional Links
http://link.springer.com/10.1007/s11696-017-0218-4Type
Journal articleLanguage
enISSN
1336-9075ae974a485f413a2113503eed53cd6c53
10.1007/s11696-017-0218-4
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