Novel waterborne poly(urethane‐urea)/silica nanocomposites

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F20%3A00532979" target="_blank" >RIV/61389013:_____/20:00532979 - isvavai.cz</a>
Result on the web
<a href="https://onlinelibrary.wiley.com/doi/10.1002/pc.25690" target="_blank" >https://onlinelibrary.wiley.com/doi/10.1002/pc.25690</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1002/pc.25690" target="_blank" >10.1002/pc.25690</a>

Result language
angličtina
Original language name
Novel waterborne poly(urethane‐urea)/silica nanocomposites
Original language description
A series of novel transparent mechanically strong waterborne poly(urethane‐urea)/silica nanocomposites were prepared by mixing a waterborne poly(urethane‐urea) dispersion with aqueous nanosilica, followed by slow water evaporation. This procedure is simple, environmentally friendly and energetically undemanding. The silica content in the nanocomposite film varied from 0 to 50 wt%. Based on changes of tensile characteristics, for example, Young's modulus values, three types of behavior were observed: typical elastic (0‐10 wt%), plastic (30 wt%) and ceramic‐like (50 wt% silica) materials can be prepared. However, some films feature both elastic and plastic (material with 20 wt% silica) or plastic and ceramic‐like characteristics (material with 40 wt% silica). The Young's modulus varied from 6 to 705 MPa, and the maximal tensile strength and elongation‐at‐break were 17.3 MPa and 1270%, respectively. The maximum energy‐to‐break, 60 mJ mm−3, was achieved for the film containing 30 wt% silica. All these materials can potentially be used as soft‐to‐hard topcoats, depending on the specific demands.
Czech name
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Czech description
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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

Project
<a href="/en/project/GA18-03932S" target="_blank" >GA18-03932S: Polyurethanes with integrated inorganic/organic blocks and controllable hydrolytic stability</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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