The effect of pre-set extension on the degree of hydrolytic degradation in multicomponent polyurethane elastomers
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F17%3A00474995" target="_blank" >RIV/61389013:_____/17:00474995 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1016/j.polymdegradstab.2017.05.033" target="_blank" >http://dx.doi.org/10.1016/j.polymdegradstab.2017.05.033</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.polymdegradstab.2017.05.033" target="_blank" >10.1016/j.polymdegradstab.2017.05.033</a>
Alternative languages
Result language
angličtina
Original language name
The effect of pre-set extension on the degree of hydrolytic degradation in multicomponent polyurethane elastomers
Original language description
The impact of pre-set extension on the degree of hydrolytic degradation in all-aliphatic polyurethane (PU) films was tested in phosphate-buffered saline (PBS) for a period of up to 12 months. The PUs were synthesized from polycarbonate-based macrodiol (MD), diisocyanate-1,6-hexane (HDI), butane-1,4-diol (BD) and d,l-lactide-based oligomeric diol (DLL). Macrodiol with molecular weights of ~2800 Da, three DLL oligomers (~400, 660 and 850 Da) and three MD-to-BD-to-DLL molar ratios were chosen for PU synthesis. The isocyanate-to-total-hydroxyl-group ratio was kept constant at 1.05. The functional properties of raw polyurethane films and the samples immersed for 1, 3, 6, 9 and 12 months in a model physiological environment (37 °C, pH = 7.4) were studied. The pre-set extension varied from 20 up to 150% and was applied on PUs with or without any DLL. The given pre-set strain had only slight – but varying – influence on the extent of the hydrolytic process, compared to the non-extended analogues. In samples that underwent efficient orientation and crystallization under strain (three-component PU and PU containing DLL ca. 400 Da), the degradation process was slightly inhibited compared with that of the unstrained analogues. If the systems were composed of sequences not capable of efficient crystallization under strain (PUs containing DLL ca. 660 and 850 Da), then the hydrolytic degradation of the pre-strained samples was accelerated. The observed changes in the functional properties of the mechanically strained PU materials subjected to the long-term hydrolytic process under physiology-mimicking conditions are important for potential medical, package coating, and film applications.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10404 - Polymer science
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Polymer Degradation and Stability
ISSN
0141-3910
e-ISSN
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Volume of the periodical
142
Issue of the periodical within the volume
August
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
10
Pages from-to
69-78
UT code for WoS article
000408183300008
EID of the result in the Scopus database
2-s2.0-85019997864