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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

  • Czech description

Classification

  • Type

    D - Article in proceedings

  • CEP classification

    CD - Macromolecular chemistry

  • OECD FORD branch

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

  • ISSN

    1022-1360

  • e-ISSN

  • 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