Matches in SemOpenAlex for { <https://semopenalex.org/work/W3023179621> ?p ?o ?g. }
Showing items 1 to 89 of
89
with 100 items per page.
- W3023179621 abstract "In this study, broadband dielectric spectroscopy and differential scanning calorimetry (DSC) measurements are performed to study the dynamics of water and polymers in an aqueous solution of poly(vinylpyrrolidone) (PVP) with concentrations of 60, 65, and 70 wt % PVP in a temperature range of 123–298 K. Two distinct relaxation processes, l- and h-processes, which originate from the segmental chain motion of PVP and the primary relaxation process of water, respectively, are observed simultaneously. The relationship between l- and h-processes and their temperature dependences mimic those of the α-process and Johari–Goldstein β-process, which are observed in ordinal glass formers. The relaxation time of the l-process, τₗ, obeys the Vogel–Fulcher (VF)-type temperature dependence, and the glass-transition temperature of the l-process, Tg,ₗ, which is defined by the temperature that is reached in a τₗ of 100–1000 s, shows good agreement with the calorimetric Tg obtained by DSC. The temperature dependence of the relaxation time of the h-process, τₕ, exhibits a crossover from VF to Arrhenius behavior at the so-called fragile-to-strong transition (FST) of water at Tg,ₗ. The temperature dependence of the relaxation strength of the h-process, Δeₕ, increases with a decrease in temperature from 298 K to Tg,ₗ. Below Tg,ₗ, Δeₕ is nearly constant or slightly decreases with decreasing temperature. According to previous studies on aqueous solutions of sugars and alcohols, the Δe of the ν-process, which originates from local motion of water, decreases with decreasing temperature above the Tg of the α-process, which originates from the cooperative motion of the solute and water. Therefore, the l-process in the PVP–water mixture is not a result of the cooperative motion of PVP and water but rather a result of the polymer–polymer cooperative motion of PVP. In addition, agreement among Tg,ₗ, the temperature of the FST of water, and calorimetric Tg suggests that the FST of water occurs at Tg." @default.
- W3023179621 created "2020-05-13" @default.
- W3023179621 creator A5021069657 @default.
- W3023179621 creator A5032654467 @default.
- W3023179621 creator A5033236472 @default.
- W3023179621 creator A5035804543 @default.
- W3023179621 creator A5072045090 @default.
- W3023179621 creator A5090424201 @default.
- W3023179621 date "2016-01-01" @default.
- W3023179621 modified "2023-09-23" @default.
- W3023179621 title "Glass Transition and Dynamics of the Polymer and Water in the Poly(vinylpyrrolidone)–Water Mixtures Studied by Dielectric Relaxation Spectroscopy B" @default.
- W3023179621 hasPublicationYear "2016" @default.
- W3023179621 type Work @default.
- W3023179621 sameAs 3023179621 @default.
- W3023179621 citedByCount "0" @default.
- W3023179621 crossrefType "journal-article" @default.
- W3023179621 hasAuthorship W3023179621A5021069657 @default.
- W3023179621 hasAuthorship W3023179621A5032654467 @default.
- W3023179621 hasAuthorship W3023179621A5033236472 @default.
- W3023179621 hasAuthorship W3023179621A5035804543 @default.
- W3023179621 hasAuthorship W3023179621A5072045090 @default.
- W3023179621 hasAuthorship W3023179621A5090424201 @default.
- W3023179621 hasConcept C113196181 @default.
- W3023179621 hasConcept C121332964 @default.
- W3023179621 hasConcept C122865956 @default.
- W3023179621 hasConcept C133386390 @default.
- W3023179621 hasConcept C147789679 @default.
- W3023179621 hasConcept C15744967 @default.
- W3023179621 hasConcept C178790620 @default.
- W3023179621 hasConcept C184651966 @default.
- W3023179621 hasConcept C185592680 @default.
- W3023179621 hasConcept C188027245 @default.
- W3023179621 hasConcept C192562407 @default.
- W3023179621 hasConcept C2776029896 @default.
- W3023179621 hasConcept C39353612 @default.
- W3023179621 hasConcept C39519442 @default.
- W3023179621 hasConcept C49040817 @default.
- W3023179621 hasConcept C521977710 @default.
- W3023179621 hasConcept C77805123 @default.
- W3023179621 hasConcept C86183883 @default.
- W3023179621 hasConcept C95121573 @default.
- W3023179621 hasConcept C97355855 @default.
- W3023179621 hasConceptScore W3023179621C113196181 @default.
- W3023179621 hasConceptScore W3023179621C121332964 @default.
- W3023179621 hasConceptScore W3023179621C122865956 @default.
- W3023179621 hasConceptScore W3023179621C133386390 @default.
- W3023179621 hasConceptScore W3023179621C147789679 @default.
- W3023179621 hasConceptScore W3023179621C15744967 @default.
- W3023179621 hasConceptScore W3023179621C178790620 @default.
- W3023179621 hasConceptScore W3023179621C184651966 @default.
- W3023179621 hasConceptScore W3023179621C185592680 @default.
- W3023179621 hasConceptScore W3023179621C188027245 @default.
- W3023179621 hasConceptScore W3023179621C192562407 @default.
- W3023179621 hasConceptScore W3023179621C2776029896 @default.
- W3023179621 hasConceptScore W3023179621C39353612 @default.
- W3023179621 hasConceptScore W3023179621C39519442 @default.
- W3023179621 hasConceptScore W3023179621C49040817 @default.
- W3023179621 hasConceptScore W3023179621C521977710 @default.
- W3023179621 hasConceptScore W3023179621C77805123 @default.
- W3023179621 hasConceptScore W3023179621C86183883 @default.
- W3023179621 hasConceptScore W3023179621C95121573 @default.
- W3023179621 hasConceptScore W3023179621C97355855 @default.
- W3023179621 hasLocation W30231796211 @default.
- W3023179621 hasOpenAccess W3023179621 @default.
- W3023179621 hasPrimaryLocation W30231796211 @default.
- W3023179621 hasRelatedWork W1601092623 @default.
- W3023179621 hasRelatedWork W1970858481 @default.
- W3023179621 hasRelatedWork W1972088477 @default.
- W3023179621 hasRelatedWork W1976328666 @default.
- W3023179621 hasRelatedWork W1981117044 @default.
- W3023179621 hasRelatedWork W1993676543 @default.
- W3023179621 hasRelatedWork W2018635553 @default.
- W3023179621 hasRelatedWork W2031893610 @default.
- W3023179621 hasRelatedWork W2038086110 @default.
- W3023179621 hasRelatedWork W2064252290 @default.
- W3023179621 hasRelatedWork W2066902192 @default.
- W3023179621 hasRelatedWork W2071661861 @default.
- W3023179621 hasRelatedWork W2075833308 @default.
- W3023179621 hasRelatedWork W2142858082 @default.
- W3023179621 hasRelatedWork W2313999420 @default.
- W3023179621 hasRelatedWork W2377612149 @default.
- W3023179621 hasRelatedWork W2434260396 @default.
- W3023179621 hasRelatedWork W2954866766 @default.
- W3023179621 hasRelatedWork W3152362449 @default.
- W3023179621 hasRelatedWork W7870660 @default.
- W3023179621 isParatext "false" @default.
- W3023179621 isRetracted "false" @default.
- W3023179621 magId "3023179621" @default.
- W3023179621 workType "article" @default.