Thermoresponsive behaviour of terpolymers containing poly(ethylene oxide), poly(2-ethyl-2-oxazoline) and poly(.epsilon.-caprolactone) blocks in aqueous solutions: an NMR study
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F16%3A00464015" target="_blank" >RIV/61389013:_____/16:00464015 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1007/s00396-016-3930-7" target="_blank" >http://dx.doi.org/10.1007/s00396-016-3930-7</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s00396-016-3930-7" target="_blank" >10.1007/s00396-016-3930-7</a>
Alternative languages
Result language
angličtina
Original language name
Thermoresponsive behaviour of terpolymers containing poly(ethylene oxide), poly(2-ethyl-2-oxazoline) and poly(.epsilon.-caprolactone) blocks in aqueous solutions: an NMR study
Original language description
1H NMR spectroscopy was used for the first time to investigate temperature behaviour of aqueous solutions of nanoparticles (NPs) prepared from linear and Y-shape terpolymers containing blocks of poly(ethylene oxide) (PEO), poly(2-ethyl-2-oxazoline) (PEtOx) and one linear or two star poly(ε-caprolactone) (PCL) blocks with different length. Structural changes were characterized separately for all blocks in a temperature range 295–360 K, and a broad transition was observed at temperatures above similar to 320 K. The temperature behaviour of NPs solutions depends on polymer concentration and especially on terpolymer architecture. At the same time, NMR measurements revealed important role of PCL blocks in this behaviour. The spin-spin relaxation times T2 of water (HDO) give information on the behaviour of water and on polymer-water interactions within the aforementioned temperature range. In NPs solutions of the linear copolymer, two types of water were detected at higher temperatures: “free and “bound water molecules with long and very short T2 values, respectively. For NPs solution of non-linear terpolymer, two types of water were observed only for the highest used (1.5 wt%) polymer concentration.
Czech name
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Czech description
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Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
CD - Macromolecular chemistry
OECD FORD branch
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Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Colloid and Polymer Science
ISSN
0303-402X
e-ISSN
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Volume of the periodical
294
Issue of the periodical within the volume
11
Country of publishing house
DE - GERMANY
Number of pages
10
Pages from-to
1717-1726
UT code for WoS article
000386339600003
EID of the result in the Scopus database
2-s2.0-84982095359