Phase transition in hydrogels of thermoresponsive interpenetrating polymer networks
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F16%3A00456047" target="_blank" >RIV/61389013:_____/16:00456047 - isvavai.cz</a>
Alternative codes found
RIV/00216208:11320/16:10332011
Result on the web
<a href="http://dx.doi.org/10.1002/masy.201400244" target="_blank" >http://dx.doi.org/10.1002/masy.201400244</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1002/masy.201400244" target="_blank" >10.1002/masy.201400244</a>
Alternative languages
Result language
angličtina
Original language name
Phase transition in hydrogels of thermoresponsive interpenetrating polymer networks
Original language description
We compared behavior of hydrogels of two types of thermoresponsive interpenetrating polymer networks (IPN), PNIPMAm/PNIPAm and PVCL/PNIPAm, during their phase transition. One or two transitions, depending on the ratio of both IPN components, were found by NMR and DSC. SANS results showed that compact multi-chain globules with gyration radius silimar to 20 nm are formed in collapsed IPN hydrogels. A certain portion of spatially restricted bound water (HDO) was established for all studied IPNs in the phase transition region and at temperatures above the phase transition by NMR methods. Fraction of bound water slowly decreases with time. The separate signal of bound water in NMR spectra appears already in pretransition region at temperatures when polymer segments just begin to form collapsed structures. Higher content of bound water as found for collapsed PVCL/PNIPAm hydrogels in comparison with PNIPMAm/PNIPAm hydrogels is in accord with swelling experiments and lower values of the shear mechanical modulus, and shows the decisive role of bound water in this respect.n
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
CD - Macromolecular chemistry
OECD FORD branch
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Result continuities
Project
<a href="/en/project/GA13-23392S" target="_blank" >GA13-23392S: Designing and characterization of novel thermosensitive polymer hydrogels</a><br>
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
Article name in the collection
Macromolecular Symposia. Volume 359, Issue 1
ISBN
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ISSN
1022-1360
e-ISSN
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Number of pages
7
Pages from-to
111-117
Publisher name
WILEY-VCH Verlag
Place of publication
Weinheim
Event location
Salerno
Event date
Sep 22, 2014
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
000377290000013